Air V = 600 m'/min | P 100 kPa T=27 C R-134a P = I MPa T1=90 C P= 95 kPa T= 60 C P, 1 MPa T = 30°C Refrigerant-134a at 1 MPa and 90°C is to be cooled to 1 MPa and 30°C in a condenser by air. The air enters at 100 kPa and 27°C with a volume flow rate of 600 m/min and leaves at 95 kPa and 60°C. Determine the mass flow rate of the refrigerant. O A10 kgmin O D125 kylmin C)S0 kg imin 2 I75 kgmir 100 kamn

Air V = 600 m'/min | P 100 kPa T=27 C R-134a P = I MPa T1=90 C P= 95 kPa T= 60 C P, 1 MPa T = 30°C Refrigerant-134a at 1 MPa and 90°C is to be cooled to 1 MPa and 30°C in a condenser by air. The air enters at 100 kPa and 27°C with a volume flow rate of 600 m/min and leaves at 95 kPa and 60°C. Determine the mass flow rate of the refrigerant. O A10 kgmin O D125 kylmin C)S0 kg imin 2 I75 kgmir 100 kamn

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A refrigeration system with a capacity of 15 tons of refrigeration, operates at 150 kPa in the evaporator, while in the condenser it is 1590 kPa. If refrigerant R-717 is saturated, calculate the theoretical power required to operate the compressor. Compressor Power = kW.
A barometric condenser serves a steam turbine which is exhausting 2720 kg ofsteam per hour at a pressure of 0.007MPa and having a quality of 90%.a. Determine the gpm of 15.56°C cooling water needed.b. Determine the temperature of cooling water needed.
Q2: Two stage vapour compression refrigeration system with water intercooler uses R-22 as shown in figure 2 below. The evaporating temperature is -40 °C and condensing temperature 40 °C. The refrigeration capacity is 10 TR and the compression is adiabatic reversible process. The refrigerant leaves the water intercooler at 10 °C. Draw the cycle on p-h diagram and determine:- 1- The refrigerant mass flow rate. 2- Work done of each compressor. 3- Condenser heat load. >4- Coefficient of performance. 60 1
100 x 200 mm ammonia compressor with a compression efficiency of 82% operates with a suction pressure of 291.57 kPPa and a condenser pressure of 1203.7 kPa at 22 rps. The refrigerant cools 100 kg/min of water from 250C to 20C and assuming 5% of the useful refrigerating effect is lost due to the process of cooling, determine: a) RE in tons of refrigeration h2 = 1653 kJ/kg b) mass flow rate of ammonia c) actual work of compression kW d) find Brake work (kW) if mechanical eff is 90% e) Actual volumetric eff f) clearance volumetric eff if c=6%
A Single Stage Vapor Compression (SSVC) refrigeration system has a cooling capacity of 7.5 tons. The following are the actual conditions: discharge of the evaporator is at -30°C & 0.2 MPa, discharge of the condenser is at 30°C & 2.0 MPa, discharge of the compressor is at 130°C & 2.5 MPa. Determine the HP/ton of the system.
A vapor compression refrigeration cycle undergoes wet compression and maintains the temperatureof the refrigerated space to -25C. The system uses R-12 refrigerant and undergoes isentropicexpansion to the inlet of the evaporator. The compressor discharges the refrigerant at saturatedvapor state at a condensing pressure of 1367 kPa. Determine:a) Determine the enthalpy of all statesb) Determine the quality of refrigerant entering the evaporatorc) Determine the quality of refrigerant leaving the evaporatord) Refrigerant effecte) Work of compressionf) COP If a liquid to suction heat exchanger was installed to prevent wet compression such that it allows 6Csub cooling of refrigerant and superheating to 8C. The expansion of refrigerant is no moreisentropic but isenthalpic. Therefore, determine:g) Enthalpy at different section of the cycleh) COP of the system compared to COP of standard vapor compression cycle.
(a) Figure 3 shows a refrigeration system using Refrigerant-134a as the refrigerant has a compressor that consumes 800 W of power when operational. The refrigerant enters the evaporator at 100 kPa as saturated mixture of quality 25% and leaves the condenser the same pressure as at a temperature of -26°C. Determine the rate of heat rejected (Q.) at the condenser and the COP of the refrigerator. The mass flow rate of the refrigerant is 0.005 kg/s. condenser expansion compressor valve evaporator Figure 3: Refrigeration system (b) After graduation, you decided to work overseas to experience living in a country with four seasons. Your neighbour, knowing that you are an engineer asked your help to install a heat pump system for his house. He wanted to always maintain the temperature in his house at 24°C during winter. In that area during winters, average outside temperature is -3°C. He also has an underground water well with average water temperature of 10°C during winter. You estimated that…
Catalogue data for R-32 compressor with a displacement of 80 L/s show the capacity to be 8 tons when the suction conditions are 0.2 MPa and -20°C and condensing temperature is 50°C. The refrigerant leaves the condenser as saturated liquid. Calculate the actual volumetric efficiency and the brake work of the compressor if the compressor efficiency is 65%. By using the R-32 chart provided. Please help me! answering this problem.
Condenser pressure is 1200 kPa, Intermediate pressure 500 kPa and evaporator pressure 200 kPa, T7 = 40 Celsius degree, system cooling load QL = 25kW, compressor isentropic efficiency 0.8. Condenser outlet is saturated liquid, evaporator outlet is saturated steam. Draw the T-s diagram, please.
Example 2: Refrigerant R-134a enter the compressor of a has a refrigerantor a superheared vapor at 0.14MPa and -10°C at arate of 0.05kg/sec and leave at 0.8Mp and 50°C.The refrigerant cooled in the condenser to 26°C and 0.72Mpa is throttled to 0.15MPa.Disregradingany heat transfere and pressure drop in the connecting line between the components. Determine: a) The rate of heat removed from the refrigerated space b) The power input to the compressor. c) Isentropic eff of the compressor d) COP of the refrigerantor.
A cooling system with a capacity of 10 tons of refrigeration operates at 210 KPA in the evaporator while in the condenser it is 850 KPA if the R-134a refrigerant is in a saturated state calculate the theoretical power required to operate the compressor.
750 kPa 800 kPa 55°C Condenser (3) Expansion valve Compressor Evaporator Figure 3 4. The liquid leaving the condenser of a 30 kW heat pump using refrigerant 134a as the working fluid is subcooled by 5.4°C. The condenser operates at 1 MPa and the evaporator at 0.4 MPa. How does this subcooling change the power required to drive the compressor as compared to an ideal vapour-compression refrigeration cycle? (3.41 kW, 3.25 kW)