What is ejector refrigeration system?
What is ejector refrigeration system?
An ejector refrigeration system can be considered as a modification of a conventional vapor compression cycle (VCC). An ejector takes the place of a compressor to pressurize the refrigerant vapor flowing from an evaporator and discharge it to a condenser. The conventional ejector refrigeration cycle is shown in Fig.
Which is the main part of ejector refrigeration system?
steam ejector
5. a steam ejector consists of four principal parts the primary nozzle , the mixing chamber , the ejector throat and the subsonic diffuser.
Why expansion valve is used in refrigeration system?
Expansion valves are devices used to control the refrigerant flow in a refrigeration system. They help to facilitate the change of higher pressure of liquid refrigerant in the condensing unit to lower pressure gas refrigerant in the evaporator.
What are the 4 main components in a refrigeration system?
The 4 Main Refrigeration Cycle Components
- The compressor.
- The condenser.
- The expansion device.
- The evaporator.
What is the purpose of ejector?
The purpose of the ejector is to transport and compress a weight of induced fluid from the suction pressure to the exit pressure. By staging ejectors it is possible to obtain a very large range of suction pressures from atmospheric down to as low as one micron of mercury absolute.
Are refrigerant compressor is used to?
In the vapor compression refrigeration cycle, compressors play a vital role in pressurizing vaporized refrigerant from a low pressure and temperature to high pressure and temperature in preparation for traveling through a condenser.
What is entertainment ratio in ejector refrigeration system?
The entrainment ratio is a global parameter generally used to evaluate the performance of the ejector system. To calculate the entrainment ratio, the entrained secondary flow required. The secondary flow entrain in suction chamber due to supersonic velocity/low pressure at the exit of nozzle.
What is the difference between the expansion valve and the compressor in the refrigeration system?
Refrigerant flows through the compressor, which raises the pressure of the refrigerant. The heat given off is what makes the condenser “hot to the touch.” After the condenser, the refrigerant goes through the expansion valve, where it experiences a pressure drop.
How do you choose an expansion valve for refrigeration?
The following procedure helps to select the correct valve for the system.
- Determine the pressure drop across the valve.
- Determine required valve capacity.
- Determine required orifice size.
- Select a thermostatic charge.
- Determine if external equalizer is required.
- Order the required components.
What is the function of ejector in refrigeration system?
An ejector takes the place of a compressor to pressurize the refrigerant vapor flowing from an evaporator and discharge it to a condenser. The conventional ejector refrigeration cycle is shown in Fig. 14.1. Working fluid is heated at a high pressure and temperature in the generator.
What factors affect the performance of an ejector?
Shock position of the mixed fluid and the expansion angle of the primary fluid jet stream within the mixing chamber played very important roles in the ejector performance. An ejector refrigeration system can be considered as a modification of a conventional vapor compression cycle (VCC).
What is an ejector cooling technology?
Ejector cooling technology can be used for air conditioning in trains and large buildings [1].
What is the maximum efficiency of gas cooler ejector?
experimental investigation of ejector geometry, which shows that the ejector efficiency has maximum with respect to. high pressure and ejector efficiencies were reached up to 23%. The maximum of ejector efficiency depends on the. ejector geometry, the evaporation temperature and the gas cooler outlet temperature.