Study of Solar Ejector Refrigerant System Using Refrigerant R717 in Office Building

2013 ◽  
Author(s):  
Hui-fan Zheng ◽  
Xiao-wei Fan ◽  
Hong-chao Liu
Keyword(s):  
Solar Collector ◽  
Air Conditioning ◽  
Simulation Method ◽  
Climatic Conditions ◽  
Time Sequence ◽  
Office Building ◽  
Coefficient Of Performance ◽  
Evacuated Tube Solar Collector ◽  
Detailed Simulation ◽  
Evacuated Tube

A detailed simulation program calculating the performance of solar ejector refrigerant system for comfort air conditioning was presented in this paper. Based on the climatic conditions of xi’an region, the performance of a solar ejector refrigerant system for office building has been analyzed using R717 as refrigerant, the results show that the coefficient of performance (COP) of the system decline in time sequence, and the average COP about the specific days from May to August can arrive to 0.22, 0.12, 0.11, and 0.14. In addition, it is found that solar ejector refrigerant system can provide 13% to 83% heat cooling that the office building needed when the evacuated tube solar collector is 500m2 in xi’an specific days from May to August. The simulation method and results are both a useful reference for the design of solar ejector refrigerant system in xi’an region.

scholarly journals The effect of changing the evacuated tube tilt angle and the fluid of the solar collector on the performance of a hybrid solar air conditioning system

2015 ◽  
Vol 12 (2) ◽  
pp. 288-292
Author(s):  
Baghdad Science Journal
Keyword(s):  
Tilt Angle ◽  
Solar Collector ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Evacuated Tube Solar Collector ◽  
Current Consumption ◽  
Air Conditioning Systems ◽  
Evacuated Tube ◽  
Consumption Saving ◽  
A Current

In the hybrid coolingsolar systems , a solar collectoris used to convertsolar energy intoheat sourcein order to super heat therefrigerant leave thecompressor,andthisprocess helpsin the transformation ofrefrigerant state from gaseous statetothe liquid statein upper two-thirdsof thecondenserinstead of the lower two-thirdssuchas in thetraditional air-conditioning systems and this willreduce theenergyneeded torun the process ofcooling.In this research two hybrid air-conditioning system with an evacuated tube solar collector were used, therefrigerant was R22 and the capacity was 2 tons each.The tilt angle of the evacuated tube solar collector was changed and the solar collector fluid was replaced into oil instead of water.A comparison wasin the amount ofcurrentconsumptionof the two systems at the same operating conditions.The currentconsumptionof the hybrid coolingsystemwith the changed tilt angle and replaced fluid wasless thantheunchanged oneby(38% - 58%), meaning that there was a current consumption saving as a result of tubes tilt angle and solar collector fluid changing.

scholarly journals Experimental Investigation of a Single Basin -Single Slope Solar Still Coupled with Evacuated Tube Solar Collector

2021 ◽  
Vol 27 (6) ◽  
pp. 16-34
Author(s):  
Rafal N. Taqi ◽  
Zeina Ali Abdul Redha ◽  
Falah Ibrahim Mustafa
Keyword(s):  
Experimental Investigation ◽  
Solar Collector ◽  
Climatic Conditions ◽  
Solar Still ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube ◽  
The Impact

This work is an experimental investigation for single basin-single slope solar still coupled with an evacuated tube solar collector. The work is carried out under the climatic conditions of Baghdad city (33.2456º North and East latitude, 44.3337º longitude) through certain days of the months of the year 2019 to study the impact of using evacuated tube solar collector on the daily productivity and efficiency under the outdoors climatic conditions. It was found that using the evacuated tube solar collector increase daily productivity from 2.175 kg/  to 2.95 kg/ for 9 hours (35.63 %) for clear days, also an enhancement about 10.97 % in daily efficiency.

scholarly journals Study of a solar air conditioning system with ejector

2020 ◽  
Vol 5 (1) ◽  
pp. 14
Author(s):  
Ghodbane Mokhtar
Keyword(s):  
Solar Collector ◽  
Air Conditioning ◽  
Human Life ◽  
Electrical Energy ◽  
Well Being ◽  
Climatic Conditions ◽  
Power Grids ◽  
Air Conditioner ◽  
The Face ◽  
Thermal Generator

Air conditioning is one of the indispensable conditions of well-being in human life, so the face of this research to provide this basic necessity in remote areas and in desert places far from power grids. To achieve this goal, solar air conditioning has been adopted, where the compressor was replaced by an ejector, a parabolic trough solar collector and a small pump; this means that the solar air conditioner does not need a huge amount of electrical energy to operate. This paper is studding the thermodynamic cycles of this air conditioner as a function of changing the climatic conditions of Bouzaréah region in Algeria under several practical conditions of heat exchangers (Condenser, Evaporator and Generator). This study will allow the determination of the optical and thermal efficiency of the solar collector used as a solar thermal generator, refrigeration subsystem performance (COPEje) and system thermal ratio of the air conditioner, where the cooling load is estimated at 18 kW.

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