2023年全國碩士研究生考試考研英語一試題真題(含答案詳解+作文范文)_第1頁
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1、3500 英文單詞, 英文單詞,1.9 萬英文字符,中文 萬英文字符,中文 5400 字文獻出處: 文獻出處:Gugulothu R, Somanchi N S, Banoth H B, et al. A Review on Solar Powered Air Conditioning System [J]. Procedia Earth 1. IntroductionAs a kind of renewable energy, sol

2、ar energy is paid more and more attention in the world. Solar system can be classified into two categories; those are thermal systems which convert solar energy to thermal energy and photovoltaic systems which convert so

3、lar energy to electrical buildings of three or fewer stories above graded. Manufacturing buildings, which manufacture and store products for examples medicinese. The transportation sectors like Automobiles, aircraft, rai

4、lroad cars, buses and cruising ships.... etcAir conditioning systems are mainly for the occupant’s health and comfort. They are often called comfort air conditioning systems.1.2. Principle of air conditioning systemFigur

5、e 1 shows the window mounted air conditioning system. The cabinet is divided into indoor and outdoor compartments which are separated by insulated wall to reduce the heat transfer. The DX coil and indoor fan are in the i

6、ndoor compartment. The outdoor compartment contains the compressors, condensers, outdoor fan, capillary tube and fan motor. The fan motor often has a double ended shaft which drives both fans at a time.Fig. 1. Window mou

7、nted air conditioningReturn air from the conditioned space flows through a coarse air filter and is cooled and dehumidified in a DX coil and then enters the inlet of the indoor fan. In a room air conditioner, the indoor

8、fan is a forward curved centrifugal fan. The conditioned air is pressurised in the impeller and forced through the air passage that leads to the supply grille. The conditioned air is then supplied to the conditioned spac

9、e to offset the space cooling load.Outdoor air is extracted by the propeller fan and forced through the condensing coils, in which hot gaseous refrigerant is condensed to liquid refrigerant. During condensation, condensi

10、ng heat is released to the outside through the cooling air. A portion of outdoor ventilation air is extracted by the indoor fan and mixed with the return air. The opening of the outdoor ventilation air intake is adjustab

11、le.Scientists and engineers are trying to develop more efficient air conditioning systems that are capable of achieving good indoor air quality with low energy consumption rates and air pollution emissions. Among the evo

12、lving energy efficient air conditioning technologies are liquid desiccant air conditioning (LDAC) systems, which have showed promising performance during the past decades and are believed to be a strong competitor with t

13、he widely used conventional air conditioning systems (CAC).The air handling in air conditioning systems was moist because of the dehumidification process in summer, so bacteria were easily propagated and developed. In ad

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