冷热组合型超市系统的设计与经济性分析.pdfVIP

上海节能 节 能 技 术 冷热组合型超市系统的 设计与经济性分析 天津商业大学制冷系 宁静红 李惠宇 彭苗 摘 要:设计了冷热组合型超市系统,利用CO2跨临界循环对空间夏季供冷和冬季供热,采用 R290/CO2复叠式制冷循环对食品冷冻冷藏,同时回收CO2跨临界循环高温气体散发的热量和 R290/CO2复叠式制冷循环R290高温循环气体的冷凝热,实现夏季空间供冷、食品制冷的同时供 应生活热水,冬季空间供暖、食品制冷的同时供应生活热水,及春秋季节食品制冷同时供应生活热 水。并与供冷、供暖、食品制冷和供应生活热水分别进行的常规R404A超市系统的能效相比较,得 出冷热组合型超市系统的能耗大大降低,能效明显增加,不仅节约能源,而且保护环境,是很有发展 前景的绿色环保系统。 关键词:组合系统;超市;CO2跨临界循环;R290/CO2复叠式制冷循环;热回收 DesignandeconomicsanalysisonCCHHRsystem insupermarket ByNingJinghong LiHuiyu PengMiao : Abstract Inthispaper,acombinedspacecooling,spaceheating,waterheatingandfood refrigeration(CCHHR)system usedinsupermarketisdesigned.Thissystem providescoolingfor spaceinsummerandprovidesheatingforspaceinwinterbyusingCO transcriticalcycle.A 2 R290/CO cascadedrefrigerationcycleusingR290astherefrigerantforthehighertemperature 2 cycleandCO astherefrigerantforthelowertemperaturecycleisusedforfoodrefrigeration. 2 Thecoolingheatemittedfrom hotCO gasofCO transcriticalcycleandcondensationheat 2 2 emittedfrom R290cycleisrecoveredbyheatrecoverysystem.Itnotonlyreducestheheat- pollutionbutalsoprovideshotwater.Sothissystem havethreerunningmode,providescooling space,hotwaterandfoodrefrigerationinsummer,providesheatingspace,hotwaterandfood refrigerationinwinter,provideshotwaterandfoodrefrigerationinspringaswellasautumn. Moreover,thissystem iscomparedwithtypicalconventionalsupermarkettechnologythatprovides coolingspace,heatingspace,hotwaterandfoodrefrigerationrespectively.Itisobtainedthatthe energyconsumptionintheCCHHR system isreducedlargelyandenergyefficiencyisincrea