【摘要】 双级压缩跨临界CO₂热泵适合于低温地板辐射采暖。以北京市某建筑为对象,进行了双级压缩跨临界CO₂热泵中间冷却型式的优化分析。结果表明:与单级压缩循环相比,双级压缩循环提高了系统供热的性能系数（COP）,并且双级压缩循环中间完全冷却的COP高于中间不完全冷却型式。同时在保持最佳中间冷却压力下,双级压缩中间不完全冷却型式的COP随着高压级压缩机入口CO₂蒸气过热度的增加而逐渐减小。因此在实际系统设计中,双级压缩跨临界CO₂采暖热泵宜采用中间完全冷却型式。更多还原

【Abstract】 A two-stage trans-critical CO₂ heat pump is suitable for heating low-temperature radiant floor.For an architecture in Beijing,the intercooling pattern optimization of a two-stage trans-critical CO₂ heat pump is processed.Results indicate that the two-stage compression cycle has a higher coefficient of heating performance（COP） than that in a single stage compression cycle.For a two-stage compression cycle,the COP of a complete intercooling type is higher than an incomplete intercooling type.As the degree of superheated CO₂ vapor at higher stage compressor inlet increases, the COP of the incomplete intercooling type decreases under the optimum intermediate pressure.So when designing the actual system,the intercooling pattern of a two-stage trans-critical carbon dioxide heat pump should be a complete type.更多还原