Study on the temperature adaptability of free-piston Stirling heat pump

Heat pump technology can effectively reduce the energy consumption and environmental pollution caused by coal-fired heating. However, commonly used heat pump heating systems have poor performance in low temperature environments, making it challenging to meet the heating demand in cold regions. In this paper, the performance of an electrically driven free-piston Stirling heat pump is studied based on SAGE software. The numerical simulation results show that the 2409 W heating capacity can be obtained with the input electric power of 1 kW, heating temperature of 40 degrees C and ambient temperature of -20 degrees C. The overall coefficient of performance reaches 2.41 with corresponding relative Carnot efficiency of 46.2%. In addition, the operation characteristics of this heat pump system under different temperature conditions are investigated in detail. With the constant difference between heating and ambient temperatures, this heat pump can operate efficiently in different temperature ranges. With the increase of temperature difference, the available energy loss in the whole system decreases, leading to the improvement of relative Carnot efficiency. These results show the strong adaptability of the free-piston Stirling heat pump system to different working temperatures.

Automated summary

This study investigates the performance of an electrically driven free-piston Stirling heat pump system, showing efficient heating in low temperature environments and detailed analysis of its operational characteristics under different temperature conditions.