A thermostatic expansion valve using R-134a in the power assembly is designed to produce 100C superheat at an evaporator temperature of 00C. What will be the superheat that it will maintain when the evaporator temperature is –300C? Given for R-134a, the saturation pressure temperature data :
|
Temp (0C)
Pressure (bar)
Temp (0C)
Pressure (bar)
|
–30
.8438
–5
2.43
|
–25
1.065
0
2.928
|
–20
1.327
5
3.5
|
–15
1.64
10
4.146
|
–10
2.006
|