《建筑给水排水设计标准》中空气源热泵热水系统设计探讨

Discussion on Design Method of Air Source Heat Pump Hot Water System in the Standard for Design of Building Water Supply and Drainage

为了使广大设计者掌握空气源热泵热水系统的计算方法,对《建筑给水排水设计标准》(GB 50015—2019)中空气源热泵热水系统及辅助热源的适用性、辅助热源的运行及其供热量的计算、空气源热泵机组的供热量、贮热水箱(罐)的容积等方面存在的问题进行了分析,完善了空气源热泵机组、辅助热源、贮热水箱(罐)容积的计算方法。指出空气源热泵热水系统不仅适用于夏热冬暖和夏热冬冷地区,也适用于寒冷和严寒地区;在标准中应将空气源热泵的技术内容独立于水源热泵书写;应对以最冷月平均气温和春分、秋分所在月的平均气温作为指标的合理性进行深入研究。

For the designers to master the calculation method of the air source heat pump hot water system,some aspects included in the Standard for Design of Building Water Supply and Drainage(GB50015-2019)such as the applicability of air source heat pump hot water system and auxiliary heat source,the operation and calculation of heating capacity of auxiliary heat source,heat capacity of air source heat pump unit,the volume of heat water storage tank and so on were analyzed.The calculation methods about air source heat pump unit,auxiliary heat source and heat water storage tank were improved.It was pointed out that air source heat pump hot water system is not only suitable for hot summer/warm winter and hot summer/cold winter zones,but also suitable for severe cold and cold zones.The technical content of air source heat pump in the standard should be elaborated independently from water source heat pump.Whether the mean air temperature of coldest months and the average temperature of spring equinox and autumn equinox months are reasonable parameters or not should be studied further.