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Energies 2012, 5(11), 4643-4664; doi:10.3390/en5114643

Development of a Terminal Control System with Variable Minimum Airflow Rate

School of Architecture, Kumoh National Institute of Technology, Gumi, Gyeongbuk 730-701, Korea
Received: 12 June 2012 / Revised: 9 October 2012 / Accepted: 13 November 2012 / Published: 15 November 2012
(This article belongs to the Special Issue Energy Efficient Buildings and Green Buildings)
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Abstract

A constant minimum airflow rate is used in conventional Single Duct Variable Air Volume Terminal Box control sequences. This control sequence can cause occupant discomfort or use excessive energy under partial load conditions. If the minimum airflow rate is higher than required; terminal boxes will have significantly more simultaneous heating and cooling; and AHUs will consume more fan power. Buildings will have indoor air quality problems if the minimum airflow rate is less than required. Many engineers and researchers have investigated advanced variable air volume terminal box control algorithms without a system retrofit for thermal comfort; indoor air quality and energy savings. In this study a developed control system with variable minimum airflow rate for Single Duct Variable Air Volume Terminal Boxes was applied and validated using an actual building and evaluated for comfort; indoor air quality and energy consumption. The energy consumption and thermal performance of terminal boxes using the conventional and proposed control algorithms were compared.
Keywords: terminal control system; variable minimum airflow rate; energy consumption; thermal performance; control algorithms terminal control system; variable minimum airflow rate; energy consumption; thermal performance; control algorithms
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Cho, Y.-H. Development of a Terminal Control System with Variable Minimum Airflow Rate. Energies 2012, 5, 4643-4664.

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