| The absorption refrigeration unit driven by solar energy is one of the most extensive and successful solar refrigeration applications.Therefore,this paper takes the single-effect lithium bromide absorption refrigeration unit driven by solar energy vacuum collector as the research object,analyzes the operation characteristics of the solar refrigeration system under a typical daily meteorological condition.Firstly,the steady-state model of LiBr absorption chiller is established,and the variable condition analysis of single effect LiBr absorption chiller is carried out.The influences of temperature and flow rate of cooling water,chilled water and driving heat source water on unit performance are studiedSecondly,the mathematical model of solar vacuum tube collector is established to analyze the influence of solar radiation intensity,environmental temperature,the outlet temperature of bromine machine chilled water and the temperature of heat source water on the conversion efficiency of light coolingThen,the simulation of solar LiBr absorption refrigeration system is established to simulate the operation under different typical weather conditions(high or low radiation intensity)in the cooling season of Beijing.The total cooling capacity,time,efficiency of LiBr unit and the cooling efficiency of solar absorption system with the operating temperature(bromine unit)are obtained The change rule of the water temperature of the starting heat sourceFinally,the effects of different heat loss efficiency and water tank ratio on the performance of solar LiBr absorption refrigeration system are simulated. |
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