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以成都某高校公共浴室热水系统为例,连续跟踪采集空气源热泵热水机组2年的运行数据。分析运行数据明确空气源热泵热水机组实际运行能效随着环境温度的降低而降低,制热效率受冬季室外气温影响最严重,浴室热水机组在不同年份运行能效是不同的。基于此提出基于典型气象年气象数据评估热泵热水机组的能效。给出了热泵机组全年能源消耗效率APF概念及其计算公式,根据温度频数法将全年运行环境分为高温区、中温区和低温区,简化APF计算公式,方便计算。结合实际工程案例,由测试数据计算得到机组运行全年能效3.9,与基于典型气象年的全年能效计算结果 APF=4.1接近,而和机组额定能效比COP=4.5相差较大。结果表明:利用基于典型气象年数据和BIN分析法的全年能源消耗效率APF评价空气源热泵热水机组的能效较额定COP更为合理。
Taking a public bath hot water system in a certain university in Chengdu as an example, the 2-year operating data of the air source heat pump hot water unit was continuously tracked and collected. Analysis of operational data clearly air-source heat pump hot water unit actual operation of energy efficiency decreases with the decrease of ambient temperature, heating efficiency is most affected by outdoor temperature in winter, bathroom hot water unit operating energy efficiency in different years are different. Based on this, it is proposed to evaluate the energy efficiency of heat pump water heaters based on typical meteorological year meteorological data. The annual APF concept and its calculation formula for heat pump unit are given. According to the temperature frequency method, the annual operating environment is divided into high temperature zone, medium temperature zone and low temperature zone. The formula of APF is simplified to facilitate the calculation. According to the actual engineering case, the annual energy efficiency 3.9 of the unit is calculated from the test data, which is close to the full-year energy efficiency calculation result APF of 4.1 based on the typical meteorological year, but greatly different from the unit rated efficiency of COP = 4.5. The results show that it is more reasonable to estimate the energy efficiency of the air source heat pump water heater than the rated COP by using annual energy consumption efficiency APF based on typical meteorological years data and BIN analysis method.