Conference article

Modeling the Effects of Energy Efficient Glazing on Cabin Thermal Energy and Vehicle Efficiency

Aled Gravelle
Jaguar Land Rover Plc, JLR Research, Vehicle Efficiency, UK

Simon Robinson
Jaguar Land Rover Plc, JLR Research, Vehicle Efficiency, UK

Alessandro Picarelli
Claytex Services Limited, Edmund House, UK

Download articlehttp://dx.doi.org/10.3384/ecp15118291

Published in: Proceedings of the 11th International Modelica Conference, Versailles, France, September 21-23, 2015

Linköping Electronic Conference Proceedings 118:31, s. 291-300

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Published: 2015-09-18

ISBN: 978-91-7685-955-1

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

Automotive manufacturers are continually seeking to improve overall vehicle efficiency, one particular area of high energy consumption is the vehicle’s HVAC system which can have a significant impact on fuel economy or range in electrically powered vehicles.

Presented in this paper is the work undertaken to understand the ability to model an automotive cabin in the 1D Modelica environment including how energy efficient glazing can be modelled to determine improvements in heating or cooling efficiency at extreme ambient temperatures which will have an effect on fuel economy or electric propulsion range in an electric vehicle (EV).

The whole vehicle model and its sub-systems including the cabin and HVAC models are built using the Dymola (DYnamic MOdelling LAboratory) multi-domain physical systems engineering tool, the modelling approach to each subsystem will be discussed in this paper. The air conditioning system model has been created using 1d thermo-fluid physical models. The cabin has been modelled as a multi-zone 1d thermo-fluid model with layering effects.

Keywords

Energy efficiency; Glazing Infra-red reflective IRR Low Emissivity; Low E Energy transmission; Visible light transmission; STRIVE Panoramic roof; Windscreen Backlight; Solar irradiance

References

[1] Michigan Scientific Corporation, “User Manual for Pulley Torque Measurement System”, Milford, MI, USA, September 2013

[2] Green Rhino Energy, “Defining Standard Spectra for Solar Panels”, http://www.greenrhinoenergy.com/solar/radiation/spectra.php

[3] A. S. Gravelle, “A multi-domain thermo fluid approach to optimising HVAC systems”, IMA conference proceedings, Engineer’s House, Bristol, September 2014

[4] S Shendge, P Tilekar, S Dahiya and S Kappor, “Reduction of MAC Power Requirement in a Small Car” SAE Paper 2010-01-0803, April 2010

[5] S Gasworth, T Tankala, “Effect of Glazing Thermal Conductivity on Cabin Soak Temperature” SAE Paper 2012-01-1207, April 2012

[6] T Han, Kuo-Huey Chen, “Assessment of Various Environmental Thermal Loads on Passenger Compartment Soak and Cool-down Analyses” SAE Paper 2009-01-1148

[7] D Turler, D Hopkins, H Goudey, “Reducing Vehicle Auxiliary Loads Using Advanced Thermal Insulation and Window Technologies” SAE Paper 2003-01-1076

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