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A state space approach for the dynamic analysis of automotive air conditioning system.

Number: pap. n. R10, 2278

Author(s) : ARUL SELVAN A., SEETHALAKSHMI P.

Summary

Automotive Air Conditioning (AAC) system poses unique challenges for designers, to fulfill the customers comfort and efficient operation in wide changing ambient temperature (18°C to 45°C) and humidity (30 to 80 R.H.). This paper presents the development of a state space dynamic model (SSDM) for analyzing the vehicle air conditioning in both steady and transient mode. This model includes a vehicle cabin, variable displacement capacity (VDC) compressor and an evaporator. An experimental vehicle made up of original components from the air conditioning system of a compact passenger vehicle has been developed in order to check the results from the model. This SSDM has a non linear relationship between output state variables (cabin temperature, cabin humidity) and input manipulated variables (compressor speed, blower fan speed). It confirms the developed model after linearization around the operating point was experimentally valid, to capture the transient change in system parameter and to represent the steady state operation within in the acceptable range. Thus SSDM can be especially useful in developing different control strategies like Multi loop control, Multivariable control and Model Predictive Control etc. for improving passenger comfort, fuel economy, drivability and stalling of engines.

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Pages: 10 p.

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Details

  • Original title: A state space approach for the dynamic analysis of automotive air conditioning system.
  • Record ID : 30000651
  • Languages: English
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/07/12

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