R22风冷蒸发器计算书制冷

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,,,,,,需要自己填入参数的表格,,,,,,,,,,,,,,,,,

,,,,,,需要注意替换的表格,,,,,,,,,,,,,,,,,

,,,,,,需要注意的表格,,,,,,,,,,,,,,,,,

,,,,,,可不填写表格,,,,,,,,,,,,,,,,,

,,,,,提醒,提醒字体,,,,,,,,,,,,,,,,,

,,,,,R22冷媒,,,,,R407C冷媒,,,,,R134a冷媒,,,,,R410A冷媒,,,

,,,,,恒温恒湿空调,,水冷柜机,,热水机,恒温恒湿空调,,水冷柜机,,热水机,恒温恒湿空调,,水冷柜机,,热水机,恒温恒湿空调,,水冷柜机,

序号,项目,结果,单位,,水冷,风冷,水冷,风冷,空气源,水冷,风冷,水冷,风冷,空气源,水冷,风冷,水冷,风冷,空气源,水冷,风冷,水冷,风冷

1,请根据制冷剂的类型和系统的设计工况选取合理的制冷剂热力参数。过热度取5℃，过冷度取5℃。制冷循环在压焓图上示意如图三（附表参数参考solkan软件）,,,工况,Te/Tc=5/40℃,Te/Tc=5/50℃,Te/Tc=7/40℃,Te/Tc=7/50℃,Te/Tc=7/60℃,Te/Tc=5/40℃,Te/Tc=5/50℃,Te/Tc=7/40℃,Te/Tc=7/50℃,Te/Tc=7/60℃,Te/Tc=5/40℃,Te/Tc=5/50℃,Te/Tc=7/40℃,Te/Tc=7/50℃,Te/Tc=7/60℃,Te/Tc=5/40℃,Te/Tc=5/50℃,Te/Tc=7/40℃,Te/Tc=7/50℃

2,1点温度t1,12,℃,,10,10,12,12,12,10,10,12,12,12,10,10,12,12,12,10,10,12,12

3,比焓h1,428.63,kJ/kg,,410.51,410.51,411.24,411.24,411.24,416.61,416.61,417.58,417.58,417.58,405.89,405.89,407.07,407.07,407.07,428.04,428.04,428.63,428.63

6,2点温度t2,66.19,℃,,69.69,83.91,68.5,82.55,97.03,62.3,75.28,61.49,74.29,87.6,55.2,66.44,54.77,65.84,77.39,67.31,81.44,66.19,80.2

7,比焓h2,462.5,kJ/kg,,443.38,450.58,442.34,449.35,456.69,450.73,458.33,449.82,457.15,464.89,435.91,442.54,435.45,441.86,448.53,463.9,471.65,462.5,470.02

10,3点温度t3,34.88,℃,,35,45,35,45,55,29.91,40.33,29.91,45.33,55.85,35,45,35,45,55,34.88,44.89,34.88,44.89

11,比焓h3,256.89,kJ/kg,,243.14,256.26,243.14,265.26,270.07,244.31,260.75,244.31,260.75,278.41,249.08,263.9,249.08,263.9,279.32,256.89,275.68,256.89,275.68

14,4点温度(蒸发温度)t4,7,℃,,5,5,7,7,7,5,5,7,7,7,5,5,7,7,7,5,5,7,7

15,比焓h4,256.89,kJ/kg,,243.14,256.26,243.14,265.26,270.07,244.31,260.75,244.31,260.75,278.41,249.08,263.9,249.08,263.9,279.32,256.89,275.68,256.89,275.68

19,据此可得：,,,,,,,,,,,,,,,,,,,,,,

20,单位压缩功w0=h2-h1,33.87,kJ/kg,,制冷剂,R407C,,,,,,,,,,,,,,,,,

21,单位制冷量q0=h1-h4,171.74,kJ/kg,,蒸发/冷凝,5/54,,,,,,,,,,,,,,,,,

22,单位冷凝热qk=h2-h3,205.61,kJ/kg,,,,,,,,,,,,,,,,,,,,

23,设计风量,65000,m3/h,,,,,,,,,,,,,,,,,,,,

24,设计冷量,400,kW,,,,,,,,,,,,,,,,,,,,

25,本机采用铜管套铝片蒸发器，初步确定其结构参数如下：,,,,,,,,,,,,,,,,,,,,,,

26,每排管管数N=,192,根;,,,,,,,,,,,,,,,,,,,,

27,管排数P=,6,排;,,常规排数为4、6排，大风量小冷量场合可以考虑2排设计，不建议排数为奇数或6排以上的设计,,,,,,,,,,,,,,,,,,

28,"8流程,分路数n=",192,;,,,,,,,,,,,,,,,,,,,,

29,片间距e=,0.001814,m;,,每英寸片数：,14,"常规排数为12,14片/in，不建议密度为奇数",,,,,,,,,,,,,,,,

30,管间距s1=,0.0254,m;,,,,,,,,,,,,,,,,,,,,

31,排间距s2=,0.022,m;,,,,,,,,,,,,,,,,,,,,

32,叠片长度L=,1.6,m;,,,,,,,,,,,,,,,,,,,,

33,铜管内径di=,0.00923,m;,,,,,,,,,,,,,,,,,,,,

34,铜管外径do=,0.00993,m;,,,,,,,,,,,,,,,,,,,,

35,翅片厚度δ=,0.000115,m;,,,,,,,,,,,,,,,,,,,,

36,则:,,,,,,,,,,,,,,,,,,,,,,

37,每米肋管长的肋片表面积Af=(s1*s2-π*do2/4)*2/e,0.530628545,m2,,,,,,,,,,,,,,,,,,,,

38,每米肋管长的肋片间基管外表面积Ap=π*do*(e-δ)/e,0.029218629,m2,,,,,,,,,,,,,,,,,,,,

39,每米换热管外表面的换热面积为A=Af+Ap,0.559847174,m2,,,,,,,,,,,,,,,,,,,,

40,每米换热管内表面的换热面积为Ai=π*di,0.0289969,m2,,,,,,,,,,,,,,,,,,,,

41,肋化系数τ=A/Ai,19.30713903,,,,,,,,,,,,,,,,,,,,,

42,肋通系数（每米肋管外表面积与迎风面之比）a=A/s1,22.04122732,,,,,,,,,,,,,,,,,,,,,

43,净面比（最窄流通断面积与迎风面之比）ε=(s1-do)(e-δ)/s1/e,0.570449656,,,,,,,,,,,,,,,,,,,,,

44,总的换热面积F=A*总换热管长,1031.910311,m2,,,,,,,,,,,,,,,,,,,,

45,迎风面积Fy=N*s1*L,7.80288,m2,,,,,,,,,,,,,,,,,,,,

46,迎面风速Vy=Qf/Fy/3600,2.313960429,m/s,,迎面风速，全新风按1.2～1.8m/s设计，全回风按≤2.76m/s，混风机组按1.8m/s～2.76m/s,,,,,,,,,,,,,,,,,,

47,最小流动截面的风速v=Vy/ε,4.056379744,m/s,,,,,,,,,,,,,,,,,,,,

48,空气流通段面的当量直径de=2*(s1-di)*(e-δ)/((s1-di)+(e-δ)),0.003075383,m,,,,,,,,,,,,,,,,,,,,

49,根据给定的设计参数、室外参数和进风温度，可以计算蒸发器进出风状态点的参数如下:,,,,工况,普通,全新风,,,,恒温恒湿,,,,,,,,,,,,

50,进风干球温度t1,32.7,℃,,,27,35,,,,23,,,,,,,,,,,,

51,进风湿球温度ts1,24.33,℃,,可不填写,19,28,,,,17,,,,,,,,,,,,

52,进风焓i1,72.88,kJ/kg,,,53.55,89.11,,,,47.45,,,,,,,,,,,,

53,出风干球温度t2,20.24,℃,,,根据出风焓i2和可达到的出风相对湿度计算(一般情况下建议按90％的出风相对湿度),,,,,,,,,,,,,,,,,

54,出风湿球温度ts2,19.11,℃,,可不填写,根据出风焓i2和可达到的出风相对湿度计算(一般情况下建议按90％的出风相对湿度),,,,,,,,,,,,,,,,,

55,出风焓i2,54.41846154,kJ/kg,,,按客户参数反推得到，一般不得修改,,,,,,,,,,,,,,,,,

56,机器露点t3,,℃,,可不填写,根据出风的绝对湿度和可达到的机器露点对应的相对湿度进行反推计算（一般情况下建议按98％的机器露点相对湿度）,,,,,,,,,,,,,,,,,

57,机器露点温度对应的焓i3,,kJ/kg,,可不填写,根据出风的绝对湿度和可达到的机器露点对应的相对湿度进行反推计算（一般情况下建议按98％的机器露点相对湿度）,,,,,,,,,,,,,,,,,

58,则:,,,,,,,,,,,,,,,,,,,,,,

59,达到空气处理过程所需要的冷却效率η=(i1-i2)/(i1-i3),0.253314194,,,,,,,,,,,,,,,,,,,,,

60,达到空气处理过程所需要的制冷量Q0=G*ρ*(i1-i2),400,kW,,,,,,,,,,,,,,,,,,,,

61,空气处理过程中的析湿系数ξ=(i1-i2)/1.01(t1-t2),1.466994458,,,,,,,,,,,,,,,,,,,,,

62,空气的定性温度ta=(t1+t2)/2,26.47,℃,,,,,,,,,,,,,,,,,,,,

63,"下面利用插值法求21.5℃的空气的热物性参数,查有关资料的20℃和30℃的空气的热物性参数为:",,,,,,,,,,,,,,,,,,,,,,

64,（插值上值温度）,20,℃,,10,20,,,,,,,,,,,,,,,,,

65,运动粘度系数ν（插值上值）,0.00001506,m2/s,,0.00001416,0.00001506,,,,,,,,,,,,,,,,,

66,导温系数a（插值上值）,0.0000214,m2/s,,0.00002,0.0000214,,,,,,,,,,,,,,,,,

67,导热系数λ（插值上值）,0.0259,W/m/℃,,0.0251,0.0259,,,,,,,,,,,,,,,,,

68,密度ρ（插值上值）,1.205,kg/m3,,1.247,1.205,,,,,,,,,,,,,,,,,

69,动力粘度系数μ（插值上值）,0.0000181,N*s/m2,,0.0000176,0.0000181,0.0000186,,,,,,,,,,,,,,,,

70,（插值下值温度）,30,℃,,20,30,,,,,,,,,,,,,,,,,

71,运动粘度系数ν（插值下值）,0.000016,m2/s,,0.00001506,0.000016,,,,,,,,,,,,,,,,,

72,导温系数a（插值下值）,0.0000229,m2/s,,0.0000214,0.0000229,,,,,,,,,,,,,,,,,

73,导热系数λ（插值下值）,0.0267,W/m/℃,,0.0259,0.0267,,,,,,,,,,,,,,,,,

74,密度ρ（插值下值）,1.165,kg/m3,,1.205,1.165,,,,,,,,,,,,,,,,,

75,动力粘度系数μ（插值下值）,0.0000186,N*s/m2,,,,,,,,,,,,,,,,,,,,

76,则21℃的空气的相关热物性参数为:,,,,,,,,,,,,,,,,,,,,,,

77,运动粘度系数ν,1.56682E-05,m2/s,,,,,,,,,,,,,,,,,,,,

78,导温系数a,2.23705E-05,m2/s,,,,,,,,,,,,,,,,,,,,

79,导热系数λ,0.0264176,W/m/℃,,,,,,,,,,,,,,,,,,,,

80,密度ρ,1.17912,kg/m3,,,,,,,,,,,,,,,,,,,,

81,动力粘度系数μ,1.84235E-05,N*s/m2,,,,,,,,,,,,,,,,,,,,

82,管外空气侧的计算:,,,,,,,,,,,,,,,,,,,,,,

83,雷诺数Re=v*de/ν,796.1946999,,,,,,,,,,,,,,,,,,,,,

84,系数c1=1.36-0.24*Re/1000,1.168913272,,,,,,,,,,,,,,,,,,,,,

85,l/de,42.92148133,,,,,,,,,,,,,,,,,,,,,

86,系数c2=0.518-2.315*(l/de)/100+4.25*(l/de)2/10000-3*(l/de)3/1000000,0.070108715,,,,,,,,,,,,,,,,,,,,,

87,指数n=-0.28+0.08*Re/1000,-0.216304424,,,,,,,,,,,,,,,,,,,,,

88,指数m=0.45+0.0066*l/de,0.733281777,,,,,,,,,,,,,,,,,,,,,

89,管外空气侧换热系数αw=c1*c2*(λ/de)*(l/de)n*Rem,50.21569583,W/m2/℃,,,,,,,,,,,,,,,,,,,,

90,蒸发器能达到的冷却效率η'=1-exp(-αw*a*P/cp/ρ/Vy),0.912310681,,,,,,,,,,,,,,,,,,,,,

91,求空气侧肋管外表面的当量放热系数,,,,,,,,,,,,,,,,,,,,,,

92,m=(2ξαw/λf/δ)0.5,79.34468677,,,,,,,,,,,,,,,,,,,,,

93,l=(a*s1/2-ro)(1+0.805lg(a*s1/2/ro))正六边形肋片a=1.065,0.011559786,,,,,,,,,,,,,,,,,,,,,

94,湿工况下的肋片效率ηf=th(ml)/ml,0.789977888,,,,,,,,,,,,,,,,,,,,,

95,空气侧肋管外表面的当量放热系数αae=1.1ξαw(ηfAf+Ap)/A,64.90230112,W/m2/℃,,,,,,,,,,,,,,,,,,,,

96,计算管内换热系数αb=0.95Bqi0.6g0.2di-0.2,,,,,,,,,,,,,,,,,,,,,,

97,"插值法求蒸发温度为7.2℃时的系数A,按文献1的表7-10",,,,,,,,,,,,,,,,,,,,,,

98,10,1.54,10℃时,,,,,,,,,,,,,,,,,,,,

99,-10,1.22,-10℃时,,,,,,,,,,,,,,,,,,,,

100,7,1.492,,,,,,,,,,,,,,,,,,,,,

101,热流密度qi=制冷量/管内换热面积,7484.037644,W/m2,,,,,,,,,,,,,,,,,,,,

102,