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通过对高温热水驱动的双效溴化锂吸收式热泵机组内传热部件进行热力及传热分析,建立非线性耦合模型,并采用内部映射牛顿法进行求解,分析采用高温热源水流量调节法和高温热源水流量与溶液循环量组合式调节法时吸收式热泵机组制冷变工况性能和制热名义工况、制热变工况时热泵机组性能。研究结果表明:泵机组制冷采用高温热源水流量与溶液循环量组合式调节法时COP c较好,但高温热源水流量略高;制热名义工况时机组COPh为2.498,制热效果优于现有双效冷温水机组;机组制热变工况性能在负荷率为40%时最优,COPh高达2.700。
Through the heat and heat transfer analysis of the heat transfer components in the double effect lithium bromide absorption heat pump driven by high temperature hot water, a nonlinear coupling model was established and solved by the Newton method of internal mapping. The high temperature heat source water flux adjustment method and high temperature Heat source water flow and solution circulation volume combined adjustment method absorption heat pump unit cooling variable performance conditions and heating nominal conditions, heating and heating conditions when the heat pump performance. The results show that the COP c is better when the pump unit adopts the combination of high-temperature heat source water flow and solution circulation, but the high-temperature heat source water flow is slightly higher; when the heating nominal condition COPh is 2.498, the heating effect is better than The existing double-effect cold and warm water unit; unit heating variable performance conditions in the load rate of 40% of the best, COPh up to 2.700.