Cooling Load Calculation Procedure Engineering Essay

Cooling Load Calculation Procedure Engineering Essay The total amount of heat energy that must be removed from a system by a cooling mechanism in a unit time, equal to the rate at which heat is generated by people, machinery, and processes, plus the net flow of heat into the system not associated with the cooling machinery. [1] The sensible and latent heat transfer between the space air and the surroundings can be classified as follows: 1. Space heat gain qe, in Btu/h (W), represents the rate at which heat enters a conditioned space from an external source or is released to the space from an internal source during a given time interval. 2. Space cooling load, often simply called the cooling load Qrc, Btu /h (W), is the rate at which heat must be removed from a conditioned space so as to maintain a constant temperature and acceptable relative humidity. The sensible cooling load is equal to the sum of the convective heat transfer from the surfaces of the building envelope, furnishings, occupants, appliances, and equipment. 4. Space heat extraction rate Qex, Btu /h (W), is the rate at which heat is actually removed from the conditioned space by the air system. The sensible heat extraction rate is equal to the sensible cooling load only when the space air temperature remains constant. 5. Coil load Qc, Btu /h (W), is the rate of heat transfer at the coil. The cooling coil load Qcc, Btu/h (W), is the rate at which heat is removed by the chilled water flowing through the coil or is absorbed by the refrigerant inside the coil. Cooling load usually can be classified into two categories: external and internal. External Cooling Loads[1] These loads are formed because of heat gains in the conditioned space from external sources through the building envelope or building shell and the partition walls. Sources of external loads include the following cooling loads: 1. Heat gain entering from the exterior walls and roofs 2. Solar heat gain transmitted through the fenestrations 3. Conductive heat gain coming through the fenestrations 4. Heat gain entering from the partition walls and interior doors 5. Infiltration of outdoor air into the conditioned space Internal Cooling Loads[1] These loads are formed by the release of sensible and latent heat from the heat sources inside the conditioned space. These sources contribute internal cooling loads: 1. People 2. Electric lights 3. Equipment and appliances For [1-1] [1] see the section of references CHAPTER 2 COOLING LOAD CALCULATION PROCEDURE [2]The estimation of cooling load for a space involves calculating a surface by surface conductive, convective, and radiative heat balance for each room surface and a convective heat balance for the room air. Based on the same underlying principles, the following methods have been developed for calculating the cooling load. Cooling Load by Transfer Function Method (TFM). Total Equivalent Temperature Difference (TETD) method. Cooling Load Temperature Difference (CLTD) method. Transfer Function Method (TFM)[1] The transfer function method or weighting factor method is a simplification of the laborious heat balance method. The wide application of the TFM is due to the user-friendliness of the inputs and outputs of the TFM software and the saving of computing time. In the transfer function method, interior surface temperatures and the space cooling load were first calculated by the exact heat balance method for many representative constructions. The transfer function coefficients (weighting factors) were then calculated which convert the heat gains to cooling loads. Sometimes, transfer function coefficients were also developed through test and experiments. Calculation Procedure The calculation of space cooling load using the transfer function method consists of two steps. First, heat gains or heat loss from exterior walls, roofs, and floors is calculated using response factors or conduction transfer function coefficients; and the solar and internal heat gains are calculated directly for the scheduled hour. Second, room transfer function coefficients or room weighting factors are used to convert the heat gains to cooling loads, or the heat losses to heating loads. As described in Sec. 6.2, the sensible infiltration heat gain is the instantaneous sensible cooling load. All latent heat gains are instantaneous latent cooling loads. The TFM is limited because the cooling loads thus calculated depend on the value of transfer function coefficients as well as the characteristics of the space and how they are varied from those used to generate the transfer function coefficients. In addition, TFM assumed that the total cooling load can be calculated by simply adding the individual components-the superposition principle. However, this assumption can cause some errors. Total Equivalent Temperature Difference (TETD) Method[1] In the total equivalent temperature difference (TETD)/time-averaging (TA) method, heat gains of a number of representative exterior wall and roof assemblies are calculated. The internal heat gains and conductive heat gain are calculated in the same manner as in the TFM. The radiant fraction of each of the sensible heat gains is then allocated to a period including the current and successive hours, a total of 1 to 3 h for light construction and 6 to 8 h for heavy construction. The TETD/ TA method is also a member of the TFM family and is developed primarily for manual calculation. TETD/TA is simpler in the conversion of heat gains to cooling loads. However, the time-averaging calculation procedure is subjective-it is more an art than a rigorous scientific method. Also the TETD/TA method inherits the limitations that a TFM possesses if the TFM is used to calculate the TETD. Cooling Load Temperature Difference (CLTD) Method [2] CLTD is the method we used to calculate the cooling load of the project we were assigned. The CLTD method accounts for the thermal response in the heat transfer through the wall or roof, as well as the response due to radiation of part of the energy from the interior surface of the wall to objects and surfaces within the space. The CLTD method makes use of (a) the temperature difference in the case of walls and the roofs and (b) the cooling load factors (CLF) in the case of solar heat gain through windows and internal heat sources, i.e , Q = U x A x CLTDC Where Q is the net room conduction heat gain through roof, wall or glass (W) A is the area of the roof , wall or glass (m2) U is the overall heat transfer co efficient (kW/m2.K) CLTDC is the cooling load temperature difference (oC) For [1] [2] see the section of references CHAPTER 3 CALCULATING COOLING LOADS USING CLTD Outdoor Design Conditions[2] ASHRAE Table A 2, F1980, provides the outdoor design conditions for various locations in many countries including India, Malaysia and Singapore. The summer design column lists hourly temperature which is exceeded by 1%, 2.5 % and 5% of all the hours in the year. Selection of Indoor Conditions[2] In private homes, the indoor conditions may be chosen by the owner. But in public premisis, various codes and regulations and ordinances dictate the limits of the specific indoor design conditions. For some critical occupancy, such as, hospitals, nursing homes, computer rooms, clean rooms, etc. specific indoor design conditions will usually be established by the regulating authorities or the owners. Transmission gains[2] Heat transfer through the different components of the building envelop occurs primarily the process of conduction and convection and is generally referred to as transmission load. Transmission heat transfer is given by the following equation: Q = = (U) (A) (TD) Where, Q is the heat transfer rate (W) Rt is the sum of the individual thermal resistances (m2.oC/W) A is the surface area perpendicular to heat flux (m2) TD is the design temperature difference between indoors and outdoors U = 1/Rt is the overall heat transfer co efficient (W/m2.oC) With, Rt = R1 + R2 +  ¼ + Rm for resistance in series. The values of thermal resistances are provided for specific thickness for typical building materials usually designated by U. For materials that vary in thickness according to the application, specific conductivity k is listed in terms of unit thickness. The relation between the two is R = Where k is the coefficient of thermal conductivity (W/m.K) L is the length of the conduction path (m). CLTD/CLF calculation[2] To account for the temperature and the solar variations, the concept of cooling load temperature difference (CLTD) is introduced. The CLTD is a steady state representation of the complex heat transfer involving actual temperature difference between indoors and outdoors, mass and solar radiation by the building materials, and the time of day. The following relation makes corrections in the CLTDs for walls and roofs for deviations in design and solar conditions are as follows: CLTDc = [(CLTD + LM)k + (25.5 Tr) + (To 29.4)] f Where CLTDc is the corrected value of CLTD. LM is the colour adjustment for light coloured roof. Tr is the design room temeperature To is average outdoor temperature, computed as the design temperature less half the daily range. f is attic fan factor Solar heat gain[2] When solar rays impinge on a glass surface, some of the radiation is reflected back outside before penetrating the glass. Of that radiation which is not reflected, some is transmitted through the glass and some is absorbed by the glass. The remaining radiation is refracted slightly and goes on to heat the contents of the room. If there is external shading, such as with blinds or drapes or shades, a portion of t radiation entering the room is confined to the area immediately adjacent to the window and has a diminished effect on the conditioning of the room. All of these effects are accounted for to some degree by the following relation for calculation of cooling loads due to solar radiation: QSHG = A(SC)(SHGF)(CLF) Where QSHG is the solar radiation cooling load (W) A is the open glass area (m2) SC is the shading co efficient for various types of glasses and shadings SHGF is the maximum solar heat gain factor for specific orientation of surface, latitude and month (W/m2) CLF is the cooling load factor, dimensionless. Internal Loads[2] Lighting is often is the major space cooling load component. The rate of heat gain at any instant, however, is not the same as the heat equivalent of power supplied instantaneously to these lights. Only part of the energy from lights is transferred to the room air by convection, and thus becomes the cooling load. The remaining portion is the radiant heat that affects the conditioned space only after having been absorbed by walls, floor, furniture, upholstery, etc. and released after a time lag. The cooling load imposed by these sources is given by Q appliances= P(CLF) Where Q appliances is the cooling load due to equipment of appliances (W) P is the input operating power rating of the appliance or equipment (W) CLF is the cooling load factor (dimensionless) depending on operating hours, room construction, and air circulation. Occupancy[2] The people who occupy the building give off thermal energy continuously, the rate of which depend on the level and type of activity in which they are engaged. For the sensible portion of the heat released, a cooling load factor similar the one applied to lights and appliances has been developed to account for the lag in time between occupancy and the observed cooling load. The sensible cooling load due to people is therefore, QS = (N)(GS)(CLFS) Where QS is the sensible cooling load due to occupants (W) N is the number of occupants GS is the sensible heat gain depending on activity and time for entry (W) CLFS is the cooling load factor (dimensionless) for people. The latent heat gain from occupants is found by Ql = (N)(Gl) Where Ql is the latent heat gain N is the number of occupants Gl is the latent heat gains from occupants depending on activity and time from entry Ventilation/Infiltration[2] Heat gain from ventilation and infiltration needs to be considered in the cooling load calculations. General Design Guidelines[2] The general procedure required to calculate the space cooling load is as follows: Building configuration an characteristics: Determine the building location, orientation and external shading, building materials, external surface colour and shape. These details are usually obtained from building plans and specifications. Outdoor design conditions: Obtain the outdoor weather data for the building location and select the outdoor design conditions. Indoor design conditions: Specify temperature, humidity, air velocity, etc. Operating schedules: obtain a schedule of lighting, occupancy, internal equipment, appliances and processes generating heat load. Date and time: Select the time of the day and month to estimate the cooling load. Several different times of the day and several different months need to be analyzed to determine the peak load time. The particular day and month are often dictated by peak solar conditions. For [2] see the section of references CHAPTER 4 DATA FOR THE MAIN MOSQUE Mosque 1st Floor Figure 4.1 First floor Figure 4.2 Window type 1 (WT1) Figure 4.3 Window type 2 (WT2) Figure 4.4 Doors 1 (D1) 4.2 Mosque Ground Floor Figure 4.5 Ground floor Figure 4.6 Window Type 3 (WT3) Figure 4.7 Window Type 4 (WT4) Figure 4.8 Door 2 (D2) General Information Latitude 32ËÅ ¡, Longitude 72ËÅ ¡ [7] Main Mosque, College of Electrical and Mechanical Engineering, Rawalpindi, Pakistan Walls 33cm brick, 1.5 cm cement on both sides Roof 15 cm concrete Construction Cream color paint on both sides Glass 0.5cm black shaded Lighting 1 76 tubes each 18W, 8hrs per day Lighting 2 4 tubes each 40W, 8hrs per day Occupancy 300 people moderately active Ceiling fan 18 ceiling fans each 75 W, 8hrs per day Bracket fan 9 bracket fans, each 40W, operating 8hrs per day Ventilation 7.5 x 300 = 2200 liters/sec Note: Suspended ceiling was broken therefore; we considered it as the refrigerating space. U Value Calculation Roof Components L/k m/(W/m.K) R W/m2.K Reference Table Table title Outside air 0.044 Table A6 Surface conductance (W/m2.oC) and resistance (m2.oC/W) for air Concrete 10cm 0.15/0.51 0.294 [3] Inner air 0.160 Table A6 Surface conductance (W/m2.oC) and resistance (m2.oC/W) for air Total 0.498 U = 1/R = 1/0.498 = 2.01 Wall Component L/k m/(W/m.K) R W/m2.K Reference Table Table title Outer air 0.044 Table A6 Surface conductance (W/m2.oC) and resistance (m2.oC/W) for air Brick 0.33/0.32 1.0315 Table A7 Typical thermal properties of common building and insulating materials Cement 20.015/0.72 0.0417 Table A7 Typical thermal properties of common building and insulating materials Inside air film 0.120 Table A6 Surface conductance (W/m2.oC) and resistance (m2.oC/W) for air Total 1.237 U = 1/R = 1/1.237 = 0.808 For [3] see references Glass Component L/k m/(W/m.K) R W/m2.K Reference Table Table title Glass material 0.005/0.05 0.1 Table A7 Typical thermal properties of common building and insulating materials Outer air 0.044 Table A6 Surface conductance (W/m2.oC) and resistance (m2.oC/W) for air Inner air 0.12 Table A6 Surface conductance (W/m2.oC) and resistance (m2.oC/W) for air Total 0.264 U =1/R = 1/0.264 = 3.79 Description of appliances Items Ground floor (Qty) First Floor (Qty) Ceiling fans 12 6 Tube lights 76 (small) 4 (large) Wall fan 9 Area Calculations Eastern Wall Areas Wall area 108.11514 m2 Door area 26.3 m2 Windows area 12.76 m2 Actual wall area 69.055 m2 Actual glass area 30.4 m2 Note: The area for aluminum in the windows is not accounted for. 4.6.2 Western Wall Areas Wall area 88.4816 m2 Windows area 6.583 m2 Actual wall area 81.899 m2 Actual glass 6.003 m2 Note: The area for aluminum in the windows is not accounted for. 4.6.3 Northern Wall Areas Wall area 52.45 m2 Windows area 12.61 m2 Actual wall area 39.84 m2 Actual glass area 11.62 m2 Note: The area for aluminum in the windows is not accounted for. 4.6.4 Southern Wall Areas Wall area 52.45 m2 Windows area 6.58 m2 Door area 1.86 m2 Actual wall area 44.01 m2 Actual glass area 7.58 m2 Note: The area for aluminum in the windows is not accounted for. 4.6.5 Roof Areas Total roof area m2 4.7 CLTD Correction Calculation To = 47 16/2 = 39 To is the average outside temperature on design day equal to our design temperature minus half of daily temperature range. Exposure CLTD LM[4] K[5] 25.5 Tr To 29.4 F[6] CLTDc North 7 0.5 0.5 25.5 25.5 39 29.4 1 13.35 East 15 0 0.5 25.5 25.5 39 29.4 1 17.1 South 11 -2.2 0.5 25.5 25.5 39 29.4 1 14 West 11 0 0.5 25.5 25.5 39 29.4 1 15.1 Roof 36 1.1 0.5 25.5 25.5 39 29.4 1 27.05 For [4], [5] [6] see references. CHAPTER 5 COOLING LOAD CALCULATIONS FOR THE MAIN MOSQUE Building Main mosque Location EME College, RWP Month June Day 22 Time 0200hrs Psychrometric analysis Item Tdb Twb RH Enthalpy (h) Sp. Humidity (w) Outside 47 41 70% 183.87 0.0528 Inside 25.5 17.82 50% 57.35 0.012 Difference 21.5 23.18 20% 126.52 0.041 Daily range = 16 Transmission Load Item Description Area(m2) U factor CLTDc (oC) Qtransmission(W) Walls North 39.84 0.808 13.35 429.75 South 44.01 0.808 14 497.8 East 69.005 0.808 17.1 953.4 West 81.899 0.808 15.1 999.2 Roof 194.15 2.01 27.05 10556.03 Glass North 11.62 3.79 20.1 885.2 South 7.58 3.79 20.1 577.44 East 30.4 3.79 20.1 2315.84 West 6.008 3.79 20.1 457.3 Total transmission cooling load (W) 17671.89 Solar Radiation Description Area(m2) SC SHGF CLF QSHG North 0 South 7.58 0.94 189 0.36 484.8 East 0 West 6.003 0.94 695 0.55 2228.6 Total solar radiation gain cooling (W) 2713.4 Internal loads Item Input (W) CLF Qappliance Lights 1528 0.08 122.2 Appliances 1710 1 1710 Total internal gain cooling (W) 1832.24 Occupancy Number SHG/LHG CLF Ql Qs Sensible 300 75 0.49 11025 Latent 300 55 1 16500 Total Occupancy gains, Qoccupancy (W) 27525 Ventilation/Infiltration m3/s CFM ΆT/Άw Ql Qs Sensible 2.2 1.23 ΆT=21.5 58.18 Latent 2.2 3010 Άw=.041 7180 Total Infiltration / Ventilation load (W) 7238.2 Grand total cooling loads Ql Qs Total latent load (W) 23680 Total sensible load (W) 33300.61 Total load (kW) 56.98 Tons of refrigeration 16.3 CHAPTER 6 RESULTS AND RECOMMENDATIONS Results Following the CLTD method we calculated cooling load to be 16.3 Tons. In which main contribution was from people present in the mosque (almost half the contribution) and heat conduction through walls and windows glass. The contribution from each mode is shown in fig 6.1. Fig 6.1 Contribution from each mode of heat transfer in cooling load Recommendations Use 6 ACs each of 2.5 Ton and one of 1.5 ton, we will need all the ACs switched ON during Jumma prayers only. On normal days we will switch ON 3 or 4 ACs depending on the number of occupants. As the number of occupants decreases the required cooling load also decreases. For different values of occupants required cooling load has been calculated and shown in the fig 6.2. Fig 6.2 Relation between number of occupants and cooling load Normally 30 people are present in the mosque at prayer times so we need only 9.2 tons of refrigeration. We will switch ON three ACs of 2.5 tons and one of 1.5 tons We can minimize the Cooling load by Increasing the glass thickness By using opaque sheets on the outer side of the windows and doors By using reflecting and insulating material on the roof, reflective material will reduce solar radiation and insulating material will minimize conduction Growing trees on southern side

Charitable Works of Muhammad Ali :: Biography

Muhammad Ali is important in many ways. First, his boxing career success inspired many people to follow their dreams to attain greatness. Second, Muhammad Ali and Peter Arnell founded G.O.A.T. (Greatest of All Time) (Our). G.O.A.T. is a food and beverage company that seeks to inspire young adults to eat smarter, to live healthier lives, and to rise above their current status. G.O.A.T. products are expected to come out early next year. Third, Muhammad Ali has raised over fifty million dollars for charities throughout the world. Finally, although Ali retired from the sport in 1981, he showed his love for it by inspiring the Muhammad Ali Boxing Reform Act. This act promotes fairness in boxing. I have learned many new things about Muhammad Ali. Previously, I thought he was the greatest boxer of all time, however after my researching, I think he is one of the greatest persons of all time. I never would have guessed that by the time he was 19 years old he had already won six Kentucky Golden Gloves, two National Golden Gloves, two National AAU Titles, and an Olympic gold medal (Howard). I never knew that Ali refused to join the army because of his religion. Because of this, his boxing license was cancelled. He was stripped of his title, and was sentenced to five years in prison for draft evasion. The Supreme Court, however, reversed the draft evasion conviction on June 29, 1971, and Ali continued his boxing career. I did not know that Muhammad Ali was honored as a United Nations messenger of peace and went to Iraq in 1990 to negotiate and successfully get fifteen United States hostages released. Ali also received the Medal of Freedom last November. Ali's impact on today's society is enormous because of his success in everything he does. You can visit the Muhammad Ali Center in Louisville, Kentucky, and learn about Ali the poet, Ali the boxer, and Ali the dreamer (Visitor). The Muhammad Ali Center also offers an exhibit where you can learn about Ali's life. The Muhammad Ali Center is a non-profit organization and donations support the vision, preserve the legacy, and promote a global community. Ali has inspired many people through his boxing and through his peace work. He is a role model in whom one can find humor, equality, and good character.

Machende

c)Is there evidence for market failures or government failures in the provision of public services, merit goods and control of demerit goods in Sub-Saharan Africa? Discuss (30 marks) Market failure is a circumstance in which private markets do not bring about the allocation of resources that best satisfies society’s wants. Government failures are inefficiencies of the public sector. Public goods are goods that would not be provided in the free market system, because firms would not be adequately charge for them.Merit goods are goods that are deemed as necessary for consumption by the state and if left to the private sector only, such goods would be under-consumed . Demerit goods are goods and services whose consumption is considered unhealthy, degrading or otherwise socially undesirable due to the perceived negative effects on the consumers. Such goods are deemed as unnecessary for consumption by the state. Most of the countries in the Sub-Saharan Africa like Zimbabwe, Zambia and South Africa are operating under a mixed economy. A free-market on its own can’t best allocate resources in a best way that satisfies the society.Market failures would arise as the invisible hand on its own can’t provide adequately for the society. S d1 Qp a c d2 Costs and benefits Output External benefit Welfare loss because merit goods tend to be under consumed by the free market b Qs 0 Merit goods provide externalities but if left wholly to the private sector, it is likely that merit goods will be under consumed. In most Sub-Saharan African countries such as Zimbabwe, Namibia and Zambia, the private sector provides education at high costs which results in the under-consumption of the good.Most Governments often provide merit goods for free but when considering Sub-Saharan African countries, this has not been in practice, for instance, public schools in Burkina Faso have since been experiencing high charges of fees. This often results in welfare loss as illustrat ed by the diagram below: Welfare loss caused by under-consumption of merit goods As shown by the diagram above, under-consumption of merit goods in Sub-Sahara Africa results in the loss of welfare of ABC. Moreover, merit goods are often provided by the state, thus, to increase consumption of merit goods, the state has to increase spending on such goods.This has been practically impossible for most Sub-Saharan African countries as they have no incentive for spending on merit goods. For instance, countries such as Somalia, Burundi and Uganda. In most Sub-Saharan African countries the invisible hand and the state have since failed to control the consumption of demerit goods. The consumption of demerit goodscan lead to negative externalities which causes a fall in social welfare. The free-market often fails to control the consumption of demerit goods as it may fail to take into account the negative externalities of consumption (social cost exceeds private cost).This may be due to imperf ect information as information is a commodity that costs to obtain. For example, methods of conveying information to customers is rather poor in Africa than in European countries. Furthermore, Governments may fail to control consumption of demerit goods due to a number of reasons. For example, the government may decide to intervene in the market for the regulation of demerit goods and impose taxes on producers or consumers. This often raises prices and may produce detrimental effects to the economy like inflation in the long-run.This may restrict government from taking such decisions . In South Africa, there has been a proposal for the ban of advertisement of alcohol but it has been a failure since many alcohol producing companies have been responsible for sponsoring most sporting activities. Costs and benefits Social cost External costs {negative externalities} Private costs Limited information full information D2 D1 0 Failure to regulate consumption of demerit goods results in wel fare loss. This is illustrated below: Output Q1 Q2 Q3 Welfare loss due to unregulated consumption of demeritsAs shown above, the social optimal level of consumption would be q3, an output that takes into account the information failure of consumers and also negative externalities. There are also some government failures in Sub-Saharan Africa. Governments are awarding subsidies to firms but this may protect inefficient firms from competition and create barriers to entry for new firms because prices are kept artificially low. Subsidies and other forms of assistance by the governments cause moral hazard. Most Sub-Saharan African countries are subsidizing firms that produce fertilizer as a way of achieving long term food securities.This causes barriers to new firms which might want to produce fertilizers, as they can’t withstand the competition due to low production costs enjoyed by the existing firms. More so, there is evidence of government failure caused by rent seeking. Most Governments in the Sub-Saharan countries are in charge of controlling natural resources. This causes barriers to entry in industries that require the use of natural resources like minerals. The government will now be a monopoly in that industry and it may fail to allocate resources in the most socially desirable manner.Most Sub-Saharan countries are still developing they are bureaucratic which is very slow in decision making. This causes most governments to be inefficient as it takes time for firms and institutions to be given the permission to produce goods and services. Such goods and services might be merit or public goods and services. For example, the decision to allow Econet in Zimbabwe was slow meaning that it would rather take long for Zimbabwean citizens to enjoy the telecommunication services to be offered by Econet.In Zimbabwe there is unfair distribution of some merit goods like education, for instance, universities or tertiary education institutions. In Manicaland there are no state universities as compared to other regions such as Mashonaland, Masvingo, Midlands and Matebeleland. Examples of such universities in the favoured regions include University of Zimbabwe, Midlands States University and others. When it comes to the government provision of public services in countries like Zimbabwe, there is an unequal distribution of such services.For instance, politicians may use funds which should be assigned to produce public services to campaign. Therefore they may increase spending on public goods and services in some regions at the expense of other regions in a bid to gain political millage in such regions. However, the governments of Sub-Saharan African countries have not completely failed to provide public services, merit goods and control of demerit but have intervened in correcting market failures. Some Sub-Saharan African countries have been successful in banning the consumption and importation of cocaine which is a harmful drug.They are also c ontrolling the consumption of other drugs like marijuana . Some governments have also been improving on the provision of public services such as road networks. For instance, roads in South Africa are better off. South Africa and Nigeria have also been subsidizing the production of merit goods like education. To solve failures such as under-consumption of merit goods such as education, the Governments of Sub-Saharan African countries can increase expenditure or spending on such services. For example, the construction of more educational institutions.In Zimbabwe, there is a current project that is running the construction of a university in Manicaland (to be named Manicaland State University). The same can also to public service expenditure by the Governments of these countries. Zimbabwe is currently undergoing the construction of a dual carriage way from Mutare to Harare. This reflects an increase in expenditure on public services. Therefore, in conclusion, there is evidence of marke t failure as reflected by Government intervention. However, the governments of Sub-Saharan African countries may also fail as discussed above.

Translatory

Translatory Translatory Translatory By Maeve Maddox This reader’s question relates to the word translatory. Before writing, he looked it up:    Merriam-Webster definition: â€Å"of, relating to, or involving uniform motion in one direction.† Nothing about its clear parallel, translate. The Free Dictionary lists â€Å"translatory as an adjective under its entry for translation. Oxford does not appear to list it as a word at all – at least via online search. Translational is likely the correct adjective to use when discussing a translation, although translatory has been used to mean translational (e.g., ‘the translatory pen of William Tyndale’).    Ah, the ongoing battle of the dictionaries. The Merriam-Webster Unabridged I pay for has an entry for translatory, but no definition, just a link to translational. The OED I use via subscription does have an entry for translatory: â€Å"of or pertaining to physical translation† and offers this example from 1849: â€Å"The negative tension of an insulated metal is sensibly augmented by giving a translatory motion to the gas which attacks its surface.† M-W has a separate entry for â€Å"translatory motion†: â€Å"motion in which all points of a moving body move uniformly in the same line or direction.† No example of usage is offered. The short answer to the reader’s question is that some speakers may use translatory in reference to translating languages, but translational is the more common adjective in that context. A cursory search of the Web brought up two uses of translatory in reference to the translation of language, both from non-native English-speaking sources: The  master’s programmeprovides in-depth knowledge of (foreign) languages and translatory skills acquired in the bachelor’s programme.- University of Graz (Austria). [Some translators] failing to see the larger context or the  translatory  action at work.- Literary Translation in Modern Iran: A sociological study, by Esmaeil Haddadian-Moghaddam. A search for â€Å"translatory† on Google brings up the admonitory message: â€Å"Did you mean translator?† and Word flags the word translatory with a squiggly red line. The words translate, translator and translation have different meanings in different contexts. For me, a translation is a text written in a language other than the original, and a translator is someone who renders a work written in one language into another. In another context, a translator is a transmitter that rebroadcasts the signals of a distant TV station to rural areas: In 1973, the construction of a network of transmitters and translators connected by microwave relay was approved by the state legislature. Another meaning of translate is â€Å"To change in form, appearance, or substance.† Peter Quince uses the word with this meaning in A Midsummer Night’s Dream when, like Snount, he reacts to the sight of Bottom with an ass’s head: SNOUT: O Bottom, thou art changed! What do I see on thee? BOTTOM: What do you see? You see an ass head of your own, do you? QUINCE: Bless thee, Bottom, bless thee. Thou art translated. Translatory has its uses, but it is not the conventional choice in the context of language translation. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Vocabulary category, check our popular posts, or choose a related post below:100 Exquisite AdjectivesDeck the HallsHow to Style Legislative Terms

An Article Marketing Guide

An Article Marketing Guide An Article Marketing Guide An Article Marketing Guide By Sharon Article marketing is a great way to promote a product, service, website or blog. The name says it all: article marketing means marketing yourself with articles and its easy to do if you know how. Heres how to create a good article marketing article. The Title The title of your article is the most important part, because thats what will grab the reader. The golden rule is to tell readers what the article offers and tell them quickly within the first three or four words if possible. If youre writing about buying a second home, then use this: Buying A Second Home: Five Tips For Success rather than this: Five Tips For Success When Buying A Second Home The first tells readers straight away what they will get from your article; the second focuses on the number of tips. The Body Article marketing articles are used on websites and blogs, so follow the rules for writing good web articles. Put the most important information at the top, keep sentences and paragraphs short and make good use of subheadings. And if you promise five tips, make sure thats what you deliver. I usually start with a rough plan which outlines my main points and then I expand on each of those points in a single paragraph. I dont make these too long, as the average article marketing article is between 250 and 500 words long. The Resource Box The resource box is where you get to sell your product or service. It needs to contain your name, the address of your website, your elevator pitch and a call to action. The elevator pitch is a couple of sentences that say what you have to offer. It briefly answers the question whats in it for the reader? The call to action aims to get readers to your site to buy, join, signup orwhatever you want them to do. Other Important Information Once you have completed the article, write a summary of between two and five sentences to hook the reader. This may be a repeat of the lead or something completely different that points out what the article has to offer. If you like, include an invitation to the reader to read on. Finally, craft an author bio that shows your expertise and youre ready to submit your article. Where To Submit There are hundreds of article directories, so the choice can be daunting. Some of the best ones Ive used are: EzineArticles GoArticles IdeaMarketers There may also be article directories specific to the niche you want to target, which may be a better option for some people. Once you have written the first article, its easy to write more. I have more than 40 articles on EzineArticles and they bring traffic to my site and serve as examples of my writing. Good luck with your article marketing efforts. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Freelance Writing category, check our popular posts, or choose a related post below:Avoid Beginning a Sentence with â€Å"With†Social vs. SocietalHow Many Sentences in a Paragraph?

Environmental Economics Essay Example | Topics and Well Written Essays - 1250 words

Environmental Economics - Essay Example It is the study of environmental policies and to see how well the businesses abide by these when striving for profits. The major and common costs that these companies levy are air pollution, noise pollution, toxic and solid waste in water harming the water quality and global warming. Since about a decade, these environmental hazards have kept increasing extremely rapidly and rampantly. Thus, there is a now a sense of urgency to get rid of these problems completely. However, this has become very difficult; millions of policies have been formulated by the government and various organizations, but is they still do not produce the desirable results. One another major issue that has been faced since many years is the 'carbon emission'. Coal is one of the biggest energy resource currently used; it accounts for 50% of the electricity produced in the United States. Today, fossil fuels are a source of 80% of the world's energy needs; coal accounts for 25%, natural gas 21%, petroleum oil 34%, nuclear 6.5%, hydro power 2.2%, and biomass and waste 11%. The resources that are environmental friendly such as geothermal, solar and wind are responsible for only a measly 0.4% of the overall demand in the world. The US alone produces 1.5 billion tons of carbon dioxide from coal-burning power plants. Also, it produces great amounts of nitrogen oxides, sulphur oxides, mercury emissions and other combustible gases when coal is burned. This makes it very clear how harmful the usage of coal is for our environment. The Massachusetts Institute of Technology conducted a study and made a report called 'The Future Coal' in which they examined all developing countries that try to alleviate global warming and their usage of coal. This report discusses the hazards of global warming and how countries should restrict the emission of carbon dioxide and other greenhouse gases. It also focuses on how coal remains and important and indispensable part of every country's production, how there is a need to control the carbon emissions and then how these countries need to take care of emissions yet make use of coal to meet urgent and large energy needs. However, at the same time, this reports deals with future technologies that can be used in place of coal to meet the goal of reduced coal emissions. The main reason why businesses and producers go for coal is that it is inexpensive and abundant. Coal can be used at only a cheap cost of $1 - $2 for each MMBtu compared to $6- $12 for gas and oil (The Future Coal, 2007). Also, coal mines are evenly distributed and spread and can be found everywhere, for example United States, China, India etc; except for only a few regions such as Persian Gulf, where instead are huge oil and gas reserves. The non-carbon emitting resources, mainly nuclear and renewable, are not available everywhere; thus, these areas still rely on coal despite all the policies and awareness of carbon hazards. The positive point of following this report is that it does not advocate certain policies that improve the environment; it diverts all its findings towards the technologies that can be used if these policies are actually followed by people. It is only natural to ask for an alternative if a certain act is prohibited; and that is exactly what The Future Coal is focusing on. This study focuses on technologies that

Causes and effects of globalization Essay Example | Topics and Well Written Essays - 250 words

Causes and effects of globalization - Essay Example the importance of multinationals operating in their nation and as companies recognized the importance of expanding their business globally (Ritzer, 2007, p.70). Decrease in trade barriers such as quota systems and import, export duties even became an underlining reason that promoted globalization. When trade barriers were removed, consumers realized that they can obtain goods and services at much lesser prices as compared to the goods and products available and produced locally. Globalization was even created as organizations and nations understood the importance of technological advancements that were taking place in other regions and due to their desire to obtain these technological advancements. Globalization has been impacting humankind both in negative and positive way. This process has increased job opportunities for the workforce throughout the world, now people can find employment anywhere around the world. Another positive effect was that the developing nations have started working for developed nations which aided in solving the problem of unemployment rate in these nations. Due to globalization, interaction between cultures increased and cultural boundaries became blurred, and due to this people of one nation started accepting and adopting the cultures of other