研究目的
To analyze the performance of a newly proposed hybrid dense-array concentrator photovoltaic (CPV) and gamma type low temperature differential (LTD) Stirling engine system.
研究成果
The hybrid system with the cooling system coupled to LTD Stirling engine for waste heat recovery is 10.1% and 10.7% more efficient than the CPV system without waste heat recovery. The overall efficiency of the hybrid system and power conversion efficiency of CPV are directly proportional to the water flow rate, but the efficiency of the Stirling engine is inversely proportional to the water flow rate.
研究不足
The study is theoretical and does not include experimental validation. The performance of the system is simulated under ideal conditions.
1：Experimental Design and Method Selection:
Theoretical modelling was employed to analyze the performance of hybrid CPV and thermal (CPV/T) system using gamma type LTD Stirling engine. Schmidt Analysis was applied to compute the performance of LTD Stirling engine while computational fluid dynamic was employed to simulate the heat transfer in the CPV receiver.
2：Sample Selection and Data Sources:
The study used a dense-array CPV module and a gamma type LTD Stirling engine.
3：List of Experimental Equipment and Materials:
The system included a non-imaging dish concentrator (NIDC), an array of crossed compound parabolic concentrator (CCPC) lenses coupled to CPV cells, and a cooling block.
4：Experimental Procedures and Operational Workflow:
The active cooling system operates via a low power water pump to circulate water through the cavity of the cooling block attached to solar cells. The heat is then transferred to water flowing through the cooling block and channelled to the hot side of the Stirling engine for power conversion to mechanical power.
5：Data Analysis Methods:
The simulated result was subsequently used to determine the power conversion efficiency of the hybrid system.
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