Title:
1 ???????
??????(??) ????? ?????????? 2005?5?
2???? ???? refrigeration cycle
312-1 ??
???? ??????????
???
???
??(??)?? ????(?????),??? ????
???? ????(?????),?????????
???
3
4?????????
Coefficient of Performance
T0??
q1
?????
w
q2
T2??
5?????????
Coefficient of Performance
T1??
q1
?????
w
q2
T0??
6???????
???????????????????
????????????????? ????(kJ/s)?
???????????
1??1?0C????24?????? ?0C???????
????(??)? r 334 kJ/kg
1??3.86 kJ/s
1????3.517 kJ/s
7??????
v
?????? ???? ?????? ????? ???? ????? ?????? ????? ????
v
v
88
9 12-2 ???????? --
Gas-compression refrigeration cycle
???
?.??
2
3
???
???
???
???
1
4
10??????????
??????????
???????? ???? ? ??
11P-v??T-s?
p
T
3
2
2
3
T0
T2
1
4
1
4
v
s
s
1 2 ????
2 3 ????
p
??????
3 4 ????
s
4 1 ????
p
12?.????the coefficient of performance(COP)
???invariable specific heat
capacity
12
13??????????
? ??????,??,?????
2. q2cp(T1-T4),??cp??, (T1-T4)????, q2 ???
3. ?????m?,???Q2m q2?,
? ?????,???????
14??
1)?????T 0?TC
2)
14
15?????????????????????
?
16?.??????????? ??????,qc??, ??p??,e??,??? Qc
?e,????????? ?????
16
17 ??? ?? ??12nm1??45gk4 ?? qc??1mg61
q1??34kn3??35gm3
e??,
p??
17
18???????????????p10.1MPa,t1-20
?,??????????p20.5MPa,????????????????????t320???
tc-20?,t020?,?????????????,?1.4???(1)?????????
??kg??????(2)??????????,????????????
(2)?
????
19? (1)??????? ???,
?
??
??????
20????????
???????????
?kg?????????????kg??????
21??????
???????
?????????
(2) ?????????
???,?????12-4,?
?
22?? ? ??,?????????????????,?? ??,?
? ???,??????,????????????? ?????? ?????
???????????????6.33,????????,?????????????????????
??????????,????????????
23???????????
2. q2cp(T1-T4)?, ????q2 ???
? ?????,???????
24 12-3 ???????? --The vapor-compress
ion cycle
?.????e
24
25?.??????
25
2626
2727
28????????????????,????105kJ/h????????27c,?????-5
c,?????????????????????????????????
29? ?logp-h?,??
3012-4 ???(Refrigerants)??
??????? 1.?????????????????
2.????? 3.??????????? 4.??????,?????
5.???????????,?????????? ????
6.??????(?T-s?)??,???????? ????????????????
30
31??????? 1.????? 2.???? 3.????,??????,
31
32??????
Cm Hx Fy Clz
???
F
R(m-1)(x1)y
Cl
Cl
H
?R12CF2Cl2
C
R22CHF2Cl
F
R12 1 0 2
90n
C
H
F
33??????
?????
R134a C2H2F4Cl2
R134a
R134
34???????
?????????????????????????????????
?????????????????????????????????????
?????(???)?(???)
?(???)??? (???)
????(??)????,??????????????????????????
?,???????????,????????????????????????????????????
,??????????????? ???????????????????,????
????????????
35 ????????,??????????,??????????????????????????
? ?????????????????????,??????????????????????
?????????????????,? ??, ?????????????, ?????
???????????????,???????????????????????,????,??
?????????,?????????????????????????,??????????????
?????????,???????? ???,????????,??????????????
???????,???????????????????
3612-6 ????heat pump
?. ??
?. ????
????
?????
??????
36
37 ?. ???? ????????????30???,???
??????,???1000????
?????,????100??? ????
1.e'?TR-T0??,????e'????
2.??,???????????????
3.??????,?,????????? ???????
37