Listing ID #3881198
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Contact SupplierDescription:
A cascade system is a multistage application in which two separate refrigerant systems are interconnected in such a manner that one provides the means of heat rejection (condenser) for the other.
The lower system may, therefore may operate at a much lower temperature. Cascade system has the additional feature, over compound systems of permitting the use of different refrigerants in each cycle of the cascade.
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ADVANTAGES:
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PRINCIPLE OF OPERATION:
Cascade system is just similar to the binary vapour cycle used for the power plants. In the Binary vapour cycle a condenser for mercury works as a boiler for water.
Similarly, in the cascade system the condenser for low temperature cycle works as an evaporator for the high temperature cycle.
In a cascade system, a series of refrigerants with progressively lower freezing points is used in the series of single stage unit.
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CONSTRUCTION:
All the components of cascade system are mounted on the powder coated fabricated stand. The cascade system is divided in the three parts. These are as follows: High side ,Intermediate stage and Low side.
The cascade system consist of hermetically sealed compressors, shell and coil type condenser, desuper-heater, water flow cut-out, expansion device, expansion chamber, cascade condenser, oil-Seperator, and low-side evaporator.
The refrigerant used on the high side is R -404a, and the refrigerant used on the low side is SUVA-95.
On the high side a hermetically sealed compressor, shell and coil type condenser, drier/filter, flow meter, expansion device, and cascade condenser are connected to each other.
On the low side a hermetically sealed compressor, oil Separator, De-super heater, cascade condenser, drier/filter, expansion device, low side evaporator, expansion chamber, cooling fan are connected with each other.
Separate pressure gauges are provided to measure the pressure at the compressor inlet and compressor outlets. HP/LP cutout is used as a safety device.
Cooling thermostats are provided in the cascade condenser and in the low side evaporator. Separate energy-meters are provided to measure the energy consumed by the compressor and the heater. A dimmer is also provided to control the input of the heater. Flow meter in the liquid line is incorporated to measure the refrigerant flow. Digital temperature indicator displays temperatures at various locations as per the selection viz. temperature before and after compressor and before and after expansion.
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WORKING:pecifications subject to change without any notification.List Of Experiments:
Rating conditions * : Ambient temperature= 35o C, atmospheric pressure = 1.01 bar,
CUSTOMER SCOPE:
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