摘  要  采用兩級氨水吸收循環(huán)可以實現(xiàn)太陽能熱水驅(qū)動與風(fēng)冷冷卻的結(jié)合，從而適應(yīng)太陽能空調(diào)家用小型化需要。本文建
立了系統(tǒng)的數(shù)學(xué)模型，從熱力性能以及電力性能兩個方面對系統(tǒng)進行評估，研究表明冷卻空氣串聯(lián)流過冷凝器其次流過吸收
器時系統(tǒng)性能系數(shù)較高，夏季極端工況下熱力 COP 為 0.34，電力 COP 大于 25。變工況研究表明熱源溫度升高，蒸發(fā)溫度升
高，冷卻空氣溫度降低時系統(tǒng)熱力COP、電力COP均增大，系統(tǒng)在不利工況下性能波動較小。風(fēng)冷兩級氨水吸收循環(huán)發(fā)生的
氨蒸汽濃度較高，無需精餾，并且熱源進出口溫差較大，能夠充分利用低品位熱能，某些工況能夠回收低壓級排出的部分吸
收熱用于發(fā)生。太陽能熱水驅(qū)動氨水兩級吸收風(fēng)冷空調(diào)具有良好的應(yīng)用前景。
關(guān)鍵詞  氨水 兩級吸收 風(fēng)冷 太陽能
 
STUDY OF TWO STAGE AIR COOLED AMMONIA-WATER SOLAR
ABSORPTION AIR CONDITIONING
Lin Peng  Wang Ruzhu, Xia Zaizhong
 
(Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240)
Abstract   Combined Solar hot water driven and air-cooled air conditioning for small scale residential uses could be
realized by two stage ammonia-water absorption refrigeration. In this paper both thermal and electrical performances
are evaluated by mathematical models. The analysis showed that cooling air should cool condenser firstly and absorber
secondly. Thermal COP about 0.34 and electric COP above 25 could be obtained in hot summer condition. The
researches show that both  the thermal and electrical COP increase with  the increase of hot water and evaporation
temperature, and with the decrease of cooled air temperature. Rectifier is not required in the system because the basic
concentration of ammonia vapor could reach the standard. Low grade heat could be utilized efficiently due to large inlet
and outlet temperature difference of the driven hot water. Absorption heat recovery of low pressure side could be used
for generation to increase thermal COP in some working condition.
Keywords   Ammonia-water  Two stage absorption  Air cooled  Solar energy