Consider a two-stage cascade refrigeration cycle and a two-stage compression refrigeration cycle with a flash chamber. Both cycles operate between the same pressure limits and use the same refrigerant. Which system would you favor? Why? | Numerade
Consider a two-stage cascade refrigeration cycle and a two-stag…
May 12, 2020
numerade.com
Consider a two-stage cascade refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa. Each stage operates on the ideal vapor-compression refrigeration cycle with refrigerant-134a as the working fluid. Heat rejection from the lower cycle to the upper cycle takes place in an adiabatic counterflow heat exchanger where both streams enter at about 0.4 MPa. If the mass flow rate of the refrigerant through the upper cycle is 0.24 kg / s, determine (a) the mass flow rate of the re
Consider a two-stage cascade refrigeration system operating bet…
May 12, 2020
numerade.com
Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa and 200 kPa with refrigerant-134a as the working fluid. Heat rejection from the lower cycle to the upper cycle takes place in an adiabatic counterflow heat exchanger where the pressure in the upper and lower cycles are 0.4 and 0.5 MPa, respectively. This adiabatic counterflow heat exchanger capacity is 39 kW. In both cycles, the refrigerant is a saturated liquid at the condenser exit and a saturate
Consider a two-stage cascade refrigeration system operating bet…
Jun 8, 2023
numerade.com
Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa and 200 kPa with refrigerant-134a as the working fluid. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber operating at 0.45 MPa. Part of the refrigerant evaporates during this flashing process, and this vapor is mixed with the refrigerant leaving the low-pressure compressor. The mixture is then compressed to the condenser pressure by the high-pressure co
Consider a two-stage cascade refrigeration system operating bet…
Nov 1, 2020
numerade.com
A two-stage cascade refrigeration system (see Fig. 9.3 ) operates between TC=210 K and TH=305 K. Intermediate temperatures are TC^'=255 K and TH^'=260 K Coefficients of performance ωof each stage are 65 % of the corresponding values for a Carnot refrigerator. Determine ωfor the real cascade, and compare it with that for a Carnot refrigerator operating between TC and TH. | Numerade
A two-stage cascade refrigeration system (see Fig. 9.3 ) operates bet…
May 12, 2020
numerade.com
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