摘要
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。
According to the thermodynamic and heat-transfer theories, the nonlinear-coupled models of double effect LiBr-H2O absorption heat pump were built to analyze its cooling off-design performance and its heating nomi- nal and off-design performances. These models were solved using interior-reflective Newton method. The simulation results show that the cooling COPc of double effect absorption heat pump with heat-source water flow and solution flow control method is better than that with heat-source water flow control method, but the heat-source water flow is also higher. Moreover, the heating nominal COPh of double effect absorption heat pump is 2. 498, better than that of existing absorption water heater chiller. In addition, the off-design performance of absorption heat pump is the best and COPh is 2. 700 when heating load ratio is 40%.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2013年第3期420-426,共7页
Acta Energiae Solaris Sinica
基金
高等学校博士学科点专项科研基金(20070056141)
关键词
双效溴化锂吸收式热泵
非线性耦合模型
内部映射牛顿法
变工况性能
COP
double effect LiBr-H2O absorption heat pump
nonlinear-coupled model
interior-reflective Newton method
off-design performance
COP
