A method for controlling an air conditioner
In a method for controlling an air conditioner in a vehicle air is cooled in a heat exchanger and dehumidified and heated at a downstream of the heat exchanger arranged radiator as required and conveyed by means of a fan via at least one air nozzle into the passenger compartment of the vehicle. On the basis of parameters a comfort value is calculated which approximately corresponds to the surface temperature of the skin at a location of an occupant and which serves as a control variable.
The truncation of the source field may induce large overpredictions in the acoustic field computed through acoustic analogies. A comparative study of different correction approaches proposed in the literature is carried out, considering three different techniques: correction terms based on a convection assumption, use of model extensions, and windowing techniques. It is shown that convection-based correction terms need to take into account noncompactness effects of the source field in order to yield accurate results. A modified correction term that includes these effects is derived, and its equivalence to the method of model extensions in the case of purely convected flows is highlighted. Moreover, the performance of different windowing techniques is investigated.