Third-order lumped-parameter simulation method

Author:

Tindale A.1

Affiliation:

1. Oscar Faber Applied Research, Marlborough House, 18 Upper Marlborough Road, St Albans AL1 3UT, UK

Abstract

The value and potential accuracy of second-order simplified building thermal models have been established. This paper points out the failings of these very simple models, and describes some straightforward modifications which can significantly improve their accuracy without compromising their simplicity or speed. These modifications include the separate treatment of radiative and convective heat through the rad-air model, the addition of a third time constant to improve dynamic response and provision for the modelling of partitions and solid ground floors. The output from a simplified model incorporating these changes is compared with that for an established finite difference model and is found to be in close agreement for constructions and operating conditions typically found in the construction industry.

Publisher

SAGE Publications

Subject

Building and Construction

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