蓄能型空气源热泵热水机组性能实验

Performance experiment of air-source heat pump-based hot water unit with energy-storage

摘要:

为了探索蓄能型空气源热泵热水机组的原理及应用的可行性,研制了实验样机,并通过实验测试对机组在各种模式下的运行性能进行研究.结果表明:机组在蓄热、蓄热蓄冷、单供热水以及供热水同时供冷水模式下均能实现高效运行,尤其是在蓄热蓄冷和供热水同时供冷水模式下机组运行平均能效比更高;在蓄能运行时,蓄冷罐和蓄热罐内水温分布比较均匀,有利于提高机组的蓄能能力.增加蓄冷罐的体积以及降低压缩器启动控制点的位置,有助于改善机组的节能效果和提高机组运行的可靠性.

Abstract:

To research the principle of air-source heat pump water unit with energy storage and the application feasibility in this field,the prototype of the hot water unit is developed.Performance of the unit in every mode is studied by experiments.Test results show that the unit can efficiently work in multiple modes,such as heat storage mode,heat and cooling storage mode,hot water supply mode,hot water and chilled water supply mode.Especially,the unit works with higher average energy efficiency ratio in heat and cooling storage mode as well as hot water and chilled water supply mode.In energy storage process,water temperature distribution in hot/chilled water tanks is comparatively uniform,which is favorable for improving the capacity of thermal storage.At the mean time,increasing accumulator volume and debasing location of compressor startup can improve the energy-saving potential and enhance reliability of the unit.