水源熱泵熱力計算

根據(jù)壓縮機(jī)樣本計算輸氣系數(shù)λ、電效率η,,,,,,,,,,

一,壓縮機(jī)選型,,,,,,,,,

1,壓縮機(jī)：谷輪ZR144K3（12HP）全封閉式。,,,,,,,,,

二,工況參數(shù),,,,,,,,,

,項目,單位,代號,參數(shù),參數(shù),參數(shù),參數(shù),參數(shù),參數(shù),備注

,壓縮機(jī)排汽量,cm3/r,G容,,,184.2,,,,

,壓縮機(jī)排汽量,m3/h,G容,33.2,510.0,32.1,35.8,28.99,35.8,

1,壓縮機(jī)排汽量,dm3/h,G容,33200,510000,32100,35800,28990,35800,樣本給出.

2,蒸發(fā)溫度,℃,t0,3.0,2.0,3.0,3.0,3.0,2.5,t水′=12、t水″=7

3,壓縮機(jī)吸汽過熱度,℃,txr,11.1,10.0,11.1,11.1,11.1,10.0,樣本給出.

4,壓縮機(jī)吸汽溫度,℃,t1=t0+txr,14.1,12.0,14.1,14.1,14.1,12.5,

5,冷凝溫度,℃,tK,50.0,50.0,50.0,50.0,50.0,40.0,t風(fēng)′=35、t風(fēng)″=45

6,過冷度,℃,tL,8.3,5.0,8.3,8.3,8.3,0.0,樣本給出.

7,冷凝器出口溫度,℃,t3=tK-tL,41.7,45.0,41.7,41.7,41.7,40.0,

8,制冷量,W,QY,31381,396000,34000,36100,30100,33100,樣本給出.

9,電機(jī)輸入功率,W,PY,9318,134300,9980,10800,8960,7980,樣本給出.

三,作壓焓圖,,,,,,,,,

四,從壓焓圖查得狀態(tài)參數(shù),,,,,,,,,

1,壓縮機(jī)吸汽焓,kJ/kg,h1,414.5,413.2,413.2,413.2,413.2,413.5,

2,壓縮機(jī)排汽焓,kJ/kg,h2,448.0,447.9,447.9,447.9,447.9,440.8,

3,冷凝器出口焓,kJ/kg,h3,252.0,256.6,256.6,256.6,256.6,249.7,

4,吸汽比容,dm3/kg,v1,45.5,46.5,46.5,46.5,46.5,45.9,

三,計算,,,,,,,,,

1,壓縮機(jī)單位制冷量,W/kg,q0=（h1-h3）/3.6,45.139,43.500,43.500,43.500,43.500,45.500,

2,制冷劑質(zhì)量流量,kg/h,G質(zhì)=QY/q0,695.2,9103.4,781.6,829.9,692.0,727.5,

3,輸氣系數(shù),,λ=G質(zhì)v1/G容,0.953,0.830,1.132,1.078,1.110,0.933,G質(zhì)=G容λ/v1

4,單位理論功,W/kg,w0=（h2-h1）/3.6,9.31,9.64,9.64,9.64,9.64,7.58,

5,電機(jī)理論功率,W,PL=w0G質(zhì),6469.3,87747.1,7533.8,7999.2,6669.7,5516.7,

6,電效率,,η=PL/PY,0.694,0.653,0.755,0.741,0.744,0.691,

7,輸氣系數(shù),,λ=3.6QYv1/(h1-h3)/G容,0.953,0.830,1.132,1.078,1.110,0.933,公式簡化

8,電效率,,η=(h2-h1)G容λ/3.6/v1/PY,0.694,0.653,0.755,0.741,0.744,0.691,公式簡化

,,,,,,,,,,,

計算蒸發(fā)器、冷凝器負(fù)荷、電機(jī)功率,,,,,,,,,,

一,工況參數(shù),,,,,,,,,

,項目,單位,代號,參數(shù),參數(shù),參數(shù),參數(shù),參數(shù),參數(shù),

1,壓縮機(jī)排汽量,dm3/h,G容,33200,510000,32100,35800,28990,35800,樣本給出.

2,蒸發(fā)溫度,℃,t0,3,2,2,2,2,2.5,t水′=12、t水″=7

3,壓縮機(jī)吸汽過熱度,℃,txr,10,10,10,10,10,10,設(shè)定

4,壓縮機(jī)吸汽溫度,℃,t1=t0+txr,13,12,12,12,12,12.5,

5,冷凝溫度,℃,tK,50,50,50,50,50,40,t風(fēng)′=35、t風(fēng)″=45

6,過冷度,℃,tL,2,2,2,2,2,5,樣本給出.

7,冷凝器出口溫度,℃,t3=tK-tL,48,48,48,48,48,35,

8,蒸發(fā)器出口過熱度,℃,tzr,2,2,2,2,2,2,設(shè)定

9,蒸發(fā)器出口溫度,℃,t0′=t0+tzr,5,4,4,4,4,5,

二,作壓焓圖,,,,,,,,,

三,從壓焓圖查得狀態(tài)參數(shù),,,,,,,,,

1,壓縮機(jī)吸汽焓,kJ/kg,h1,414.0,413.2,413.2,413.2,413.2,413.5,

2,壓縮機(jī)排汽焓,kJ/kg,h2,447.1,447.9,447.9,447.9,447.9,440.8,

3,冷凝器出口焓,kJ/kg,h3,260.3,260.6,260.6,260.6,260.6,243.6,

4,蒸發(fā)器出口焓,kJ/kg,h0′,408.0,408.0,408.0,408.0,408.0,408.0,

5,吸汽比容,dm3/kg,v1,45.4,46.5,46.5,46.5,46.5,45.9,

四,系數(shù)、效率,,,,,,,,,

1,輸氣系數(shù),,λ,0.953,0.830,1.132,1.078,1.110,0.933,

2,電效率,,η,0.694,0.653,0.755,0.741,0.744,0.691,

3,指示效率,,ηi,0.85,0.85,0.85,0.85,0.85,0.85,設(shè)定

,蒸發(fā)器冷量損失系數(shù),,f1,0.97,0.99,0.99,0.99,0.99,0.99,設(shè)定

4,壓縮機(jī)熱量損失系數(shù),,f2,0.99,0.99,0.99,0.99,0.99,0.99,設(shè)定

五,計算,,,,,,,,,

1,壓縮機(jī)單位制冷量,W/kg,q1=（h1-h3）/3.6,42.7,42.4,42.4,42.4,42.4,47.2,

2,制冷劑質(zhì)量流量,kg/h,G質(zhì)=G容λ/v1,696.7,9103.4,781.6,829.9,692.0,727.5,

3,壓縮機(jī)制冷量,W,QY=q1G質(zhì),29747,385885,33132,35178,29331,34333,

4,蒸發(fā)器單位制冷量,W/kg,q0=（h0′-h3）/3.6,41.0,40.9,40.9,40.9,40.9,45.7,

5,蒸發(fā)器制冷量,W,Q0=q0G質(zhì)f1,28300,369008,31683,33639,28048,32889,

6,單位理論功,W/kg,w0=（h2-h1）/3.6,9.19,9.64,9.64,9.64,9.64,7.58,

7,電機(jī)理論功率,W,PL=w0G質(zhì),6406,87747,7534,7999,6670,5517,

8,電機(jī)實際輸出功率,W,PS=PL/η,9227,134300,9980,10800,8960,7980,

9,壓縮機(jī)指示功率,W,Pi=PL/ηi,7537,103232,8863,9411,7847,6490,

10,冷凝器熱負(fù)荷,W,Qk=QY+Pif2,37284,489117,41995,44589,37178,40823,

11,壓縮機(jī)實際排汽焓值,kJ/kg,h2′=h1+3.6w0/ηi,453,454,454,454,454,446,

12,壓縮機(jī)實際排汽溫度,℃,t2′,81,89,89,89,89,73,查壓焓圖

13,冷凝器熱負(fù)荷,W,Qk=(h2′-h1)G質(zhì)/3.6,37284,489117,41995,44589,37178,40823,第二種計算方法

14,制冷性能系數(shù),,COP=Q0/PS,3.07,2.75,3.17,3.11,3.13,4.