wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Byju's Answer
Standard XII
Chemistry
Ideal Gas Law
Refrigerant v...
Question

Refrigerant vapor enters into the compressor of a standard vapor compression cycle at −10∘C(h=402 kJ/kg) and leaves the compression at 50∘C(h=432 kJ/kg). It leaves the condenser at 30∘C(h=237 kJ/kg). The COP of the cycle is

Open in App
Solution

Given data :
h1=402 kJ/kg, h2=432 kJ/kg
h3=h4=237 kJ/kg

COP = h1−h4h2−h1=402−237432−402=16530

=5.5

flag
Suggest Corrections
thumbs-up
1
similar_icon
Similar questions
Q. A refrigerator operates between 120 kPa and 800 kPa in an ideal vapor compression cycle with R−134a as the refrigerant. The refrigerant enters the compressor as saturated vapor and leaves the condenser as saturated liquid. The mass flow rate of the refrigerant is 0.2kg/s. Properties for R−134a are as follows:

Saturated R- 134aP(kPa)T(∘C)hf(kJ/kg)hs(kJ/kg)sf(kJ/kgK)sg(kJ/kgK)120−22.3222.52370.0930.9580031.3195.5267.30.3540.918Superheated R- 134aP(kPa)T(∘C)h(kJ/kg)s(kJ/kgK)80040276.450.95

The power required for compressor in kW is
Q. A refrigerator operates between 120 kPa and 800 kPa in an ideal vapor compression cycle with R−134a as the refrigerant. The refrigerant enters the compressor as saturated vapor and leaves the condenser as saturated liquid. The mass flow rate of the refrigerant is 0.2kg/s. Properties for R−134a are as follows:

Saturated R- 134aP(kPa)T(∘C)hf(kJ/kg)hs(kJ/kg)sf(kJ/kgK)sg(kJ/kgK)120−22.3222.52370.0930.9580031.3195.5267.30.3540.918Superheated R- 134aP(kPa)T(∘C)h(kJ/kg)s(kJ/kgK)80040276.450.95

The rate at which heat is extracted, in kJ/s from the refrigerated space is
Q. In a 10 kW cooling capacity refrigeration system operating on VCRS, the refrigerant enters the evaporator with an enthalpy of 80 kJ/kg and leaves with an enthalpy of 180 kJ/kg. The enthalpy of the refrigerant after compression is 220 kJ/kg. The rate of heat transfer at the condenser is
Q. In an ideal vapour compression refrigeration cycle, the specific enthalpy of refrigerant (in kJ/kg) at the following states is given as:
Inlet of condenser: 283
Exit of condenser: 116
Exit of evaporator: 232
The COP of this cycle is
Q. A refrigerator based on ideal vapour compression cycle operates between the temperature limits of −20∘C and 40∘C. The refrigerant enters the condenser as saturated vapour and leaves as saturated liquid. The enthalpy and entropy values for saturated liquid and vapour at these temperatures are given in table below.

Thfhgsfsg(∘C)(kJ/kg)(kJ/kg)(kJ/kg K)(kJ/kg K)−20201800.070.736640802000.30.67

The COP of the refrigerator is
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
CHEMISTRY
Watch in App
explore_more_icon
Explore more
Ideal Gas Law
Standard XII Chemistry
Join BYJU'S Learning Program
book_image
AI Tutor
book_image
Textbooks
book_image
Question Papers
book_image
Install app
CrossIcon