design a vapor compression refrigeration system that will maintain the refrigerated space at -15c while operating...

design a vapor compression refrigeration system that will maintain the refrigerated space at -15c while operating in an environment at 20c using refrigerant -134a as the working fluid (By EES )please

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samet mamat answered 2 years ago

Statement: Selection of compressor and refrigerant for HVAC system that is operating on Vapor Compression Refrigeration...

Statement: Selection of compressor and refrigerant for HVAC system that is operating on Vapor Compression Refrigeration System. The heat load is 120,000 BTU/hr and temperature is to be maintained at space is 50C. Step 1: Select ambient and environmental conditions Step 2: Select refrigerant, preliminary calculations, use of property charts, suction discharge pressure of compressor to achieve required cooling, compressor capacity etc. Step 3: Select compressor (Stage, rpm, displacement, size etc) need detailed solution

12. Which component of a vapor-compression refrigeration machine provides for the cooling effect in the conditioned space?

12. Which component of a vapor-compression refrigeration machine provides for the cooling effect in the conditioned space? 16. Why would one choose a fire tube boiler instead of a water tube boiler? 17. How does one de-humidify an air mass? 18. Define an HVAC zone?

The capacity of a propane vapor-compression refrigeration system is 8 tons. Saturated vapor at 0°F enters...

The capacity of a propane vapor-compression refrigeration system is 8 tons. Saturated vapor at 0°F enters the compressor, and superheated vapor leaves at 120°F, 180 lbf/in.2 Heat transfer from the compressor to its surroundings occurs at a rate of 3.5 Btu per lb of refrigerant passing through the compressor. Liquid refrigerant enters the expansion valve at 85°F, 180 lbf/in.2 The condenser is water-cooled, with water entering at 65°F and leaving at 80°F with a negligible change in pressure. Determine (a)...

An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression refrigeration...

An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle is to maintain a space at 30°C while operating its condenser at 1000 kPa. Determine the COP of the system when a temperature difference of 2°C is allowed for the transfer of heat in the evaporator. (Take the required values from saturated refrigerant-134a tables.) The COP of the system is ?

There is a vapor compression type refrigeration cycle using the refrigerant HFC 134 a. In the...

There is a vapor compression type refrigeration cycle using the refrigerant HFC 134 a. In the condenser, it is isostatically cooled, the condensation temperature is 50 ° C., and the condenser outlet is the compressed liquid at 45 ° C. In the evaporator, it is isothermally heated, the evaporation temperature is 10 ° C. and the outlet of the evaporator is heated steam at 15 ° C. When the expansion valve performs isenthalpic expansion, and the adiabatic efficiency of the...

A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger.

A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger. The saturated liquid refrigerant at 40 ℃ leaving the condenser and enteringthe heat exchanger is used to superheat the saturated vapor refrigerant leaving the evaporator at 7 ℃ by 8 ℃. If the compressor is capable of pumping 5 1/s of vapor refrigerant measuredat the inlet to the compressor and the compression processes are considered isentropic in both cases listed below, determine; (a) The refrigerating capacity in kW,...

An ideal vapor compression refrigeration cycle using r134a as the refrigerant is being used to cool...

An ideal vapor compression refrigeration cycle using r134a as the refrigerant is being used to cool a house. It provides 3 refrigeration tons ≈ 10.5kW of cooling (heat removal from the house air). The refrigerant in the evaporator operates at 400kPa while in the condenser it is at 1000kPa. Treat the surroundings as a thermal reservoir at 33◦C and the air in the house as a thermal reservoir at 19◦C. All reservoirs are at 100kPa. 1. What is the COPr...

An ideal vapor compression refrigeration cycle with R134a as the working fluid operates between the pressure...

An ideal vapor compression refrigeration cycle with R134a as the working fluid operates between the pressure limits of 200 kPa and 1200 kPa. Determine a) the mass fraction of the refrigerant that is in the liquid phase at the inlet of the evaporator, and b) the amount of heat transfer (in kJ/kg) to the refrigerant in the evaporator (??).

A vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated...

A vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at 2 bar, and saturated liquid exits the condenser at 10 bar. The isentropic compressor efficiency is 80%. The mass flow rate of refrigerant is 7 kg/min. Determine: (a) the compressor power, in kW. (b) the refrigeration capacity, in tons. (c) the coefficient of performance.

A normal refrigeration cycle uses one coolant, so why does vapor compression cycle of an ice...

A normal refrigeration cycle uses one coolant, so why does vapor compression cycle of an ice rink you a primary coolant and a secondary coolant?

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