太阳能热水系统与跨临界二氧化碳热泵系统双向优化组合

Bi-directional Optimal Combination of Solar Hot Water System and Trans-critical Carbon Dioxide Heat Pump System

太阳能是可再生能源。它资源丰富,既可免费使用,又无需运输,对环境无任何污染。为了促进节能与环境保护,太阳能热水系统已得到广泛应用。二氧化碳作为制冷工质具有一些独特的优势:环境友好物质(ODP=0,GWP=1),无回收问题;良好的安全性和化学稳定性;具有与制冷循环和设备相适应的热力学性质;具有良好的输运和传热性质。与常规制冷剂相比,二氧化碳跨临界循环的压缩比较小,约为2.5～4.0。介绍一种太阳能热水系统与跨临界二氧化碳热泵系统的组合系统,包括太阳能热水系统,二氧化碳热泵系统。针对不同气候条件,本系统分别采用制冷、热水、制热运行模式,从而实现热水、空调与热泵三大功能。

Solar energy is a renewable energy. It is abounding and flee, and no need to transportation, without any pollution to the environment. In order to promote energy saving and environmental protection, solar water heating system has been widely used. Carbon dioxide as a refrigerant has some unique advantages： environmentally friendly natural material（ODP=O, GWl^- 1）, and no recovery; good safety and chemical stability; the ability to adapt the refrigeration cycle and the thermodynamic properties of compatible devices; a good transport and heat transfer properties. Compared with conventional refrigerants, carbon dioxide tram-critical cycle of compression is relatively small, about 2~4. In this paper, a new combined system is introduced, which consists of solar hot water system and ,tram-critical CO2 heat pump system. This system contains solar collector system, CO2 heat pump and in-outdoor heat exchange system. This combined system is easily controlled and its structure is simple. According to different air condition, this system is run under each three models： refrigeration, heating and heating water, and all achieve hot water and air-conditioning.