CAJ | 학술논문

在小功率CO2热泵热水器的基础上设计与构建了一种大功率跨临界循环CO2热泵热水系统。在该跨临界循环CO2热泵热水系统中，采用二级冷却套管式CO2气体冷却器、双毛细管并联组合节流及设置回热器等技术途径，用以提高系统的热力性能。在恒温环境实验室中测试分析了气候参数及运行参数对跨临界循环CO2热泵热水系统稳态热力性能的影响。各种典型气候条件下系统日平均运行性能的测试结果表明，根据气候条件合理地选取运行参数，该系统具有优良的热力性能。系统的制热温度可在60～85℃选取，在环境温度为4.1～27.3℃的气候条件下日平均性能系数（COP）在3.45～4.04之间。
재소공솔CO2열빙열수기적기출상설계여구건료일충대공솔과림계순배CO2열빙열수계통。재해과림계순배CO2열빙열수계통중，채용이급냉각투관식CO2기체냉각기、쌍모세관병련조합절류급설치회열기등기술도경，용이제고계통적열력성능。재항온배경실험실중측시분석료기후삼수급운행삼수대과림계순배CO2열빙열수계통은태열력성능적영향。각충전형기후조건하계통일평균운행성능적측시결과표명，근거기후조건합리지선취운행삼수，해계통구유우량적열력성능。계통적제열온도가재60～85℃선취，재배경온도위4.1～27.3℃적기후조건하일평균성능계수（COP）재3.45～4.04지간。
A high power transcritical CO2 heat pump hot water system was designed and built on the basis of the existing low power water heater. In order to improve system efficiency, two-stage gas cooler, dual capillary tube combination throttle and internal heat exchanger were used in the CO2 heat pump hot water system. The effects of climatic and operational parameters on the steady state thermal performance of the CO2 heat pump hot water system were tested and analyzed in the constant temperature environmental chamber. Test results under typical climate conditions showed that system performance was excellent. The CO2 heat pump hot water system could provide 60—85℃hot water according to climatic conditions, and its daily COP (coefficient of performance) was about 3.45—4.04 under the climatic conditions of ambient temperature at 4.1 to 27.3℃.