冷热互联系统研究及其能效计算准则讨论

随着节能减排的不断深入和能源效率的逐步提高,同时利用冷量和热量的冷热互联系统将得到进一步的推广应用。与传统的制冷系统和制热系统的能效计算相比,冷热互联系统能综合利用冷热两部分的能量,原来单独冷、热量的能效计算法则是否适用于新的系统需要重新考虑。本文构建了复叠机组和热泵机组互联(A系统)、以及常规制冷机组和热泵互联(B系统)两种冷热互联系统,提出了3种能效计算方式,通过具体实验操作和分析给出了3种系统的COP计算方式和结果,其中第3种计算方法综合考虑了制冷系统制冷量和热泵系统制热量作为收益,将整个系统的轴功率看作补偿能量,最为合理。

Discussion of Energy Efficiency Calculation Critera in Integrated System Coupling Refrigeration with Heating

With the deepening of energy conservation and emission reduction, the improvement of energy efficiency, integrated system coupling refrigeration with heating is bound to be further promoted and applied. Compared with traditional refrigeration system and heating system, the integrated system can comprehensively utilize the energy of both cold and heat. Therefore, whether the calculation of the energy efficiency of individual cold and heat is still applicable to the new system. In this paper, two kinds of integrated system coupling refrigeration with heating of integrated system A with cascade unit and heat pump, and integrated system B with conventional refrigeration unit and heat pump are constructed, and three methods of energy efficiency calculation are proposed. Through specific experiments, three coefficients of performance (COP) calculation methods and results are given for discussion and analysis within the industry. Among them, the third calculation method take into account the cooling capacity of the refrigeration system and the heating of the heat pump system, and the shaft power of the whole system is regarded as the compensation energy, it is the most reasonable method.