Enthalpy difference control method of airplane ground air conditioning system

Abstract

The invention relates to an enthalpy difference control method of an airplane ground air conditioning system, which solves the technical problems of accurately judging the refrigeration load of an airplane ground air conditioning unit and improving the energy-saving effect of the airplane ground air conditioning unit, and detects the air flow q, the air inlet temperature t1, the air outlet temperature t2, the air inlet relative humidity phi 1 and the air outlet relative humidity phi 2. And then an air enthalpy value i1 of the inlet air and an air enthalpy value i2 corresponding to the default outlet air temperature are calculated, then the absolute value of the difference value of the two enthalpy values are multiplied by the air flow q to calculate the actual load Q1 of the air conditioning unit, and the number of started compressors or the rotating speed of the compressors are determined by comparing the actual load Q1 with a rated load Q2 set by a program. According to the enthalpy difference control method, the running number and the running rotating speed of the compressors are accurately controlled, and the energy-saving effect of the airplane ground air conditioning unit is improved.

Description

Technical field[0001]The present invention relates to the field of air-conditioning technology, in particular, is a penetration control method of aircraft ground air conditioning system.Background technique[0002]At present, the air-conditioning unit of the aircraft has become an indispensable guarantee of an auxiliary power unit of the aircraft itself, providing a suitable temperature fresh air for the aircraft cabin, with the internal equipment of the aircraft and the heat generated by the passengers, and transport a new wind to maintain Comfortable environment in the cabin.[0003]Different models of civil aviation passenger planes have different demands, so the air conditioning units of the aircraft must have the performance of wind and wind pressure; the geographical position of each airport is different, the climatic conditions are different, so the air-conditioning unit must meet different ambient temperature changes. Claim. As a result, the electrical control system of the air-...

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Problems solved by technology

[0004] Although the relevant standards have divided the operating areas of air conditioning units accordingly, in the actual operation process, the temperature difference between the inlet and outlet is basically used to control the number of compressors to be turned on or the operating speed of the compressor to adjust the aircraft ground air conditioner. The cooling capacity of the unit, but the load of the air conditioner includes sensible heat load and latent heat load. During the use of conventional air-conditioning units, there will be problems such as too many or too few compressors being turned on and the compressor speed does not match the load, which will easily lead to problems such as frequent compressors and low-pressure alarms, increasing the risk of compressor damage It also causes a great waste of energy

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