Fuzzy multivariable control of domestic heat pumps

Underwood, Chris (2015) Fuzzy multivariable control of domestic heat pumps. Applied Thermal Engineering, 90. pp. 957-969. ISSN 1359-4311

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Abstract

Poor control has been identified as one of the reasons why recent field trials of domestic heat pumps in the UK have produced disappointing results. Most of the technology in use today uses a thermostatically-controlled fixed speed compressor with a mechanical expansion device. This article investigates improved control of these heat pumps through the design and evaluation of a new multivariable fuzzy logic control system utilising a variable speed compressor drive with capacity control linked through to evaporator superheat control. A new dynamic thermal model of a domestic heat pump validated using experimental data forms the basis of the work. The proposed control system is evaluated using median and extreme daily heating demand profiles for a typical UK house compared with a basic thermostatically-controlled alternative. Results show good tracking of the heating temperature and superheat control variables, reduced cycling and an improvement in performance averaging 20%.

Item Type:	Article
Uncontrolled Keywords:	Domestic heat pump; Dynamic model; Fuzzy logic control; Thermal storage; Cycling
Subjects:	H300 Mechanical Engineering
Department:	Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User:	Becky Skoyles
Date Deposited:	08 Sep 2015 08:14
Last Modified:	10 Oct 2019 16:17
URI:	http://nrl.northumbria.ac.uk/id/eprint/23702

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