scholarly journals Impact of instantaneous solar irradiance on refrigeration characteristics of household PCM storage air conditioning directly driven by distributed photovoltaic energy

2022 ◽  
Author(s):  
Yongfeng Xu ◽  
Ming Li
Keyword(s):  
Solar Irradiance ◽  
Air Conditioning ◽  
Photovoltaic Energy

Performance Analysis on a Solar-Driven Air-Cooled Ejector Refrigeration System for Air-Conditioning Using Ammonia as Refrigerant

2014 ◽  
Vol 501-504 ◽  
pp. 2282-2287 ◽  
Author(s):  
Yu Hang Liao ◽  
Wei Lu ◽  
Lie Pan
Keyword(s):  
Performance Analysis ◽  
Solar Irradiance ◽  
Air Conditioning ◽  
Cooling Capacity ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Refrigeration System ◽  
Outdoor Temperature ◽  
Indoor Temperature ◽  
Changing Trend

The performance of a solar-driven air-cooled ejector refrigeration system using ammonia as refrigerant with rated cooling capacity of 10.5kW was analyzed for air-conditioning purpose. The cooling capacity of the proposed system increases with the rising of indoor temperature and enhancement of solar irradiance, while decreases with the rising of outdoor temperature. The COP has similar changing trend with that of the cooling capacity except that it increases rapidly with the enhancement of solar irradiance firstlyand then become stable by and large after solar irradiance exceeding a certain value. The cooling capacity is 6.3~52kW and the COP 0.06~0.11 under the normal operating conditions with indoor temperature over 27, outdoor temperature below 38°C and solar irradiance surpassing 500 W/m2. The proposed system can match the climatic conditions in air-conditioning season of Nanning, a typical city in hot summer and warm winter region.

Performance analysis of static ice refrigeration air conditioning system driven by household distributed photovoltaic energy system

Solar Energy ◽  
2017 ◽  
Vol 158 ◽  
pp. 147-160 ◽  
Author(s):  
Yongfeng Xu ◽  
Xun Ma ◽  
Reda Hassanien Emam Hassanien ◽  
Xi Luo ◽  
Guoliang Li ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Air Conditioning ◽  
Energy System ◽  
Air Conditioning System ◽  
Photovoltaic Energy

scholarly journals Energy Conversion and Transmission Characteristics Analysis of Ice Storage Air Conditioning System Driven by Distributed Photovoltaic Energy System

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Yongfeng Xu ◽  
Ming Li ◽  
Reda Hassanien Emam Hassanien
Keyword(s):  
Air Conditioning ◽  
Structure Optimization ◽  
Energy Coupling ◽  
Energy System ◽  
Exergy Efficiency ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Ice Storage ◽  
Air Conditioning System ◽  
Photovoltaic Energy

In order to reduce the investment and operation cost of distributed PV energy system, ice storage technology was introduced to substitute batteries for solar energy storage. Firstly, the ice storage air conditioning system (ISACS) driven by distributed photovoltaic energy system (DPES) was proposed and the feasibility studies have been investigated in this paper. And then, the theoretical model has been established and experimental work has been done to analyze the energy coupling and transferring characteristics in light-electricity-cold conversion process. In addition, the structure optimization analysis was investigated. Results revealed that energy losses were high in ice making process of ice slide maker with only 17.38% energy utilization efficiency and the energy efficiency and exergy efficiency of ISACS driven by DPES were 5.44% and 67.30%, respectively. So the immersed evaporator and cointegrated exchanger were adopted for higher energy utilization efficiency and better financial rewards in structure optimization. The COP and exergy efficiency of ice maker can be increased to 1.48 and 81.24%, respectively, after optimization and the energy utilization efficiency of ISACS driven by DPES could be improved 2.88 times. Moreover, ISACS has the out-of-the-box function of ordinary air conditioning system. In conclusion, ISACS driven by DPES will have good application prospects in tropical regions without power grid.

scholarly journals Study of Photovoltaic Energy Storage by Supercapacitors through Both Experimental and Modelling Approaches

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Pierre-Olivier Logerais ◽  
Olivier Riou ◽  
Mohamed Ansoumane Camara ◽  
Jean-Félix Durastanti
Keyword(s):  
Energy Storage ◽  
Solar Irradiance ◽  
Electrical Circuit ◽  
Experimental Setup ◽  
Equivalent Electrical Circuit ◽  
Stored Energy ◽  
Photovoltaic Energy ◽  
Photovoltaic Array ◽  
Energy Conversion Systems ◽  
Charge Discharge

The storage of photovoltaic energy by supercapacitors is studied by using two approaches. An overview on the integration of supercapacitors in solar energy conversion systems is previously provided. First, a realized experimental setup of charge/discharge of supercapacitors fed by a photovoltaic array has been operated with fine data acquisition. The second approach consists in simulating photovoltaic energy storage by supercapacitors with a faithful and accessible model composed of solar irradiance evaluation, equivalent electrical circuit for photovoltaic conversion, and a multibranch circuit for supercapacitor. Both the experimental and calculated results are confronted, and an error of 1% on the stored energy is found with a correction largely within ±10% of the transmission line capacitance according to temperature.

Solar Photovoltaic Energy

2010 ◽  
Author(s):  
Anne Labouret ◽  
Michel Villoz
Keyword(s):  
Solar Photovoltaic ◽  
Photovoltaic Energy
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