The throttling effect cooling capacity is firstly related to the pressure difference before and after the throttling, and secondly related to the temperature of the incoming device.
Generally speaking, the greater the pressure difference before and after the throttling, the greater the throttling temperature drop and the greater the capacity to absorb heat, i.e. the greater the throttling effect cooling capacity. The pressure exiting the unit after throttling is close to atmospheric pressure and has a limited range of variation. Therefore, the magnitude of the throttling pressure drop depends mainly on the pressure after compression by the compressor. When the gas pressure of the discharge unit is 0.1 MPa and the air temperature of the incoming unit is 30°C, there are certain parameters for the effect of the throttling effect on the cooling capacity at different incoming unit pressures.
However, the higher the air pressure into the device, the correspondingly larger the electrical energy consumed by the air compressor, and the higher the requirements for safety and strength of pipelines and equipment. And, as the pressure rises, the increase in cooling capacity decreases. Therefore, the maximum pressure of small high-pressure oxygen generators generally does not exceed 20MPa, and, during normal production, the working pressure should be reduced as much as possible. The air temperature into the device increases and the throttling effect cooling capacity is slightly reduced.
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