制冷与空调
製冷與空調
제랭여공조
REFRIGERATION AND AIR-CONDITIONING
2014年
10期
104-108
,共5页
热泵%混合工质%传热窄点%COP
熱泵%混閤工質%傳熱窄點%COP
열빙%혼합공질%전열착점%COP
heat pump%mixture%heat transfer pinch point%COP
对热泵系统,提出将R744/R290/R600a三种天然工质组成的混合物替代现有制冷剂.在热泵热水器名义工况下,计算分析不同配比下混合工质热泵系统循环性能,并分别与R22,R290,R600a和R744/R290(21 %/79%)热泵系统性能进行对比.结果表明:R744/R290/R600a在最优配比下,系统制热性能系数为4.514,比R22,R290,R600a和R744/R290 (21 %/79%)系统分别增加20.50%,35.15%,41.50%和9.670%;系统冷凝压力比R22,R290和R744/R290 (21 %/79%)系统分别降低45.34%,41.20%和55.47%;新的混合工质不仅具有良好的热力学性能,而且可以有效降低系统运行压力,可以作为热泵工质的替代物.
對熱泵繫統,提齣將R744/R290/R600a三種天然工質組成的混閤物替代現有製冷劑.在熱泵熱水器名義工況下,計算分析不同配比下混閤工質熱泵繫統循環性能,併分彆與R22,R290,R600a和R744/R290(21 %/79%)熱泵繫統性能進行對比.結果錶明:R744/R290/R600a在最優配比下,繫統製熱性能繫數為4.514,比R22,R290,R600a和R744/R290 (21 %/79%)繫統分彆增加20.50%,35.15%,41.50%和9.670%;繫統冷凝壓力比R22,R290和R744/R290 (21 %/79%)繫統分彆降低45.34%,41.20%和55.47%;新的混閤工質不僅具有良好的熱力學性能,而且可以有效降低繫統運行壓力,可以作為熱泵工質的替代物.
대열빙계통,제출장R744/R290/R600a삼충천연공질조성적혼합물체대현유제랭제.재열빙열수기명의공황하,계산분석불동배비하혼합공질열빙계통순배성능,병분별여R22,R290,R600a화R744/R290(21 %/79%)열빙계통성능진행대비.결과표명:R744/R290/R600a재최우배비하,계통제열성능계수위4.514,비R22,R290,R600a화R744/R290 (21 %/79%)계통분별증가20.50%,35.15%,41.50%화9.670%;계통냉응압력비R22,R290화R744/R290 (21 %/79%)계통분별강저45.34%,41.20%화55.47%;신적혼합공질불부구유량호적열역학성능,이차가이유효강저계통운행압력,가이작위열빙공질적체대물.