Energy-efficient air-cooled DX air-conditioning systems with liquid pressure amplification

Vakiloroaya, V; Ha, QP

Energy-efficient air-cooled DX air-conditioning systems with liquid pressure amplification

Vakiloroaya, V Ha, QP

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Publication Type:: Conference Proceeding
Citation:: 31st International Symposium on Automation and Robotics in Construction and Mining, ISARC 2014 - Proceedings, 2014, pp. 489 - 498
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Vakiloroaya, V	en_US
dc.contributor.author	Ha, QP https://orcid.org/0000-0003-0978-1758	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	31st International Symposium on Automation and Robotics in Construction and Mining, ISARC 2014 - Proceedings, 2014, pp. 489 - 498	en_US
dc.identifier.isbn	9780646597119	en_US
dc.identifier.uri	http://hdl.handle.net/10453/30097
dc.description.abstract	The objective of this study is to explore an optimal strategy on energy consumption for a direct expansion (DX) air-conditioning system by using a refrigerant pump in the liquid line to allow the system to operate at a lower condensing pressure. An existing DX rooftop package of a commercial building located in a hot and dry climate zone is used for data collection. The theoretical-empirical modelling approach is used to obtain system model, from which the proposed strategy is formulated. A numerical algorithm is developed to analyse the system transient performance, using an iterative loop. As a minimum pressure differential is required across the expansion device, liquid pressure amplification (LPA) devices can be used on DX systems that operate with fixed head pressure control. They can be fitted to new or existing systems. Results show that the LPA approach is more effective when the ambient temperature is falling, with electricity saving around 25.3% in average.	en_US
dc.relation.ispartof	31st International Symposium on Automation and Robotics in Construction and Mining, ISARC 2014 - Proceedings	en_US
dc.title	Energy-efficient air-cooled DX air-conditioning systems with liquid pressure amplification	en_US
dc.type	Conference Proceeding
utslib.for	090506 Structural Engineering	en_US
utslib.for	1099 Other Technology	en_US
utslib.for	090602 Control Systems, Robotics and Automation	en_US
dc.location.activity	Sydney Australia
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US

Abstract:

The objective of this study is to explore an optimal strategy on energy consumption for a direct expansion (DX) air-conditioning system by using a refrigerant pump in the liquid line to allow the system to operate at a lower condensing pressure. An existing DX rooftop package of a commercial building located in a hot and dry climate zone is used for data collection. The theoretical-empirical modelling approach is used to obtain system model, from which the proposed strategy is formulated. A numerical algorithm is developed to analyse the system transient performance, using an iterative loop. As a minimum pressure differential is required across the expansion device, liquid pressure amplification (LPA) devices can be used on DX systems that operate with fixed head pressure control. They can be fitted to new or existing systems. Results show that the LPA approach is more effective when the ambient temperature is falling, with electricity saving around 25.3% in average.

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http://hdl.handle.net/10453/30097