What is throttling device?
In an engine, mixtur of air and petrol sent to the engine. But in case of cold starting we are required to flow only petrol into the engine. The device which stops the flow of air into the engine and only petrol is sent through the device, is called throttling device. In general throttling device is something that chokes the tube.
What are the differences between the expansion valve and throttling device used in different refrigeration cycles?
Either is used to cause the high pressure refrigerant from the condenser to rapidly expand through an orifice resulting in a drop in temperature and pressure of the refrigerant as it enters the evaporator. Either type may have a fixed orifice or use a gas or liquid expansion expansion valve to control the temperature of the evaporator.
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