An approach to rating of vehicle climate controls in hybrid and electric driven vehicles for energy efficiency
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Name:
ASME 2012 International Mechanical Engineering Congress & Exhibition
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Venue:
Houston, Texas; USA
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Date:
09.11.2012
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Author:
A. Albers, F. Brezger
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Speaker:
Friedrich Brezger
- As a part of auxiliary components climate controls and heating devices do have a relative high energy consumption maintaining the comfort of passenger cabin in the development of hybrid and especially electric vehicles. Hence, these vehicles have high potentials in optimizing the climate control. Several concepts of optimizing energy consumption of these concepts are well known, such as insulation, glasses with better transmission coefficient, pre-conditioning or heat exchanger of outlet air. The efforts, the complexity, the installation space and the weight of these implementations are increasing. At least the weights of additional components have an impact on energy consumption of the vehicle.Due to rate the interdependencies between the direct energy consumption of possible solutions and along their effects in early stages of product development, this paper introduces one possible approach for rating. Using the example of introducing a heat pump which will be used for heating and cooling of the passenger’s cabin the applicable modelling in Matlab/Simulink of itself will be demonstrated. One part of this explained implementation is a comparison of the approach based on Frank [Gro10] and another approach based on Nitz and Hucho [Gro10] in aspects of a sensitivity study. Furthermore, the impact of different insulation methods (glass transmission, insulation of the carriage) during extreme and average environmental boundary conditions as well as the changed weight and installation space is investigated. Therefore an environmental model is introduced which takes day time, season of year as well as GPS data into account. Target of this investigation is defining the minimum necessary power of a heat pump in the passenger cabin of a commercial vehicle with smallest possible installation space and increasing weight. By modelling and analysis of this example scenario sustainable values are derived in matters of enabling a cost-utility analysis of different vehicles in their market segments and the chosen solution of climate control.
- Year: 2012