NDLI: Modeling and control of an energy-efficient hybrid solar-assisted air conditioning system

Content Provider	IEEE Xplore Digital Library
Author	Vakiloroaya, V. Ha, Q.P.
Copyright Year	2013
Description	Author affiliation: Sch. of Electr., Mech. & Mechatron. Syst., Univ. of Technol., Sydney, NSW, Australia (Vakiloroaya, V.; Ha, Q.P.)
Abstract	This paper addresses the modeling and control problem of a newly-developed hybrid solar-assisted air conditioning system for improved energy efficiency. A 6kW solar-assisted direct expansion air-conditioner is used for experimentation and data collection. To increase sub-cooling of the refrigerant at partial loads, we propose a new discharge bypass line together with an inline solenoid valve, installed after the compressor to regulate the mass flow rate of the refrigerant vapor passing through a hot water storage tank. Additionally, a variable speed drive is coupled with the condenser fan to control the air flow rate and synchronized with the inline valve closing and opening. For the control purpose, a lumped parameter model is first developed to describe the system dynamics in an explicit input-output relationship; then, a linear optimal control scheme is applied for the system's multivariable control. The system has been fully-instrumented to examine its performance under different operation conditions. Numerical algorithms, implemented in a simulation tool, are then employed to predict the energy performance of the system under transient loads. Results show that up to 14% energy savings can be obtained by the proposed system.
Sponsorship	IEEE
Starting Page	1
Ending Page	6
File Size	1664100
Page Count	6
File Format	PDF
ISBN	9781862959132
DOI	10.1109/AUPEC.2013.6725417
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-29
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Australasian Committee for Power Engineering (ACPE
Subject Keyword	Control Heating Solar-Assisted Air-Conditioner Energy Efficiency Modeling
Content Type	Text
Resource Type	Article

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