Theoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit

The distribution of chilled water flow rate in terminal unit is a major factor used to evaluate the performance of central air conditioning unit. In this work, a theoretical chilled water distribution in the terminal units has been studied to predict the optimum heat performance of terminal unit....

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Autores principales:	Ahmed Abd Mohammed Saleh, Ali Reyadh Shabeeb
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2019
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/25539d76625f4220b6e3efffdaabc565
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spelling	oai:doaj.org-article:25539d76625f4220b6e3efffdaabc5652021-12-02T02:33:57ZTheoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit10.22153/kej.2018.12.0061818-11712312-0789https://doaj.org/article/25539d76625f4220b6e3efffdaabc5652019-03-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/400https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 The distribution of chilled water flow rate in terminal unit is a major factor used to evaluate the performance of central air conditioning unit. In this work, a theoretical chilled water distribution in the terminal units has been studied to predict the optimum heat performance of terminal unit. The central Air-conditioning unit model consists of cooling/ heating coil (three units), chilled water source (chiller), three-way and two-way valve with bypass, piping network, and pump. The term of optimization in terminal unit ingredient has two categories, the first is the uniform of the water flow rate representing in statically permanents standard deviation (minimum value) and the second category is the maximum heat transfer rate from all terminal units. The hydraulic and energy equations governing the performance of unit solved with the aid of FORTRAN code with considering the following parameters: total water flow rate, chilled water supply temperature, and variable valve opening. It was found that the optimum solution of three-way valve case at 8°C water supply temperature, 0.12 kg/s total water flow rate and valve opening order (valve 1: 100%, valve 2: 100% and valve 3: 75%) with total heat rate (987.92 Watt) and standard deviation (1.181E-3). Also, for the two-way valve case the results showed that the optimum condition at 8°C water supply temperature, 0.12 kg/s total water flow rate and valve opening order (valve 1: 75%, valve 2: 75% and valve 3: 50%) with total heat rate and standard deviation (717Watt) and (5.69E-4) respectively. Ahmed Abd Mohammed SalehAli Reyadh ShabeebAl-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 14, Iss 2 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Ahmed Abd Mohammed Saleh Ali Reyadh Shabeeb Theoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit
description	The distribution of chilled water flow rate in terminal unit is a major factor used to evaluate the performance of central air conditioning unit. In this work, a theoretical chilled water distribution in the terminal units has been studied to predict the optimum heat performance of terminal unit. The central Air-conditioning unit model consists of cooling/ heating coil (three units), chilled water source (chiller), three-way and two-way valve with bypass, piping network, and pump. The term of optimization in terminal unit ingredient has two categories, the first is the uniform of the water flow rate representing in statically permanents standard deviation (minimum value) and the second category is the maximum heat transfer rate from all terminal units. The hydraulic and energy equations governing the performance of unit solved with the aid of FORTRAN code with considering the following parameters: total water flow rate, chilled water supply temperature, and variable valve opening. It was found that the optimum solution of three-way valve case at 8°C water supply temperature, 0.12 kg/s total water flow rate and valve opening order (valve 1: 100%, valve 2: 100% and valve 3: 75%) with total heat rate (987.92 Watt) and standard deviation (1.181E-3). Also, for the two-way valve case the results showed that the optimum condition at 8°C water supply temperature, 0.12 kg/s total water flow rate and valve opening order (valve 1: 75%, valve 2: 75% and valve 3: 50%) with total heat rate and standard deviation (717Watt) and (5.69E-4) respectively.
format	article
author	Ahmed Abd Mohammed Saleh Ali Reyadh Shabeeb
author_facet	Ahmed Abd Mohammed Saleh Ali Reyadh Shabeeb
author_sort	Ahmed Abd Mohammed Saleh
title	Theoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit
title_short	Theoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit
title_full	Theoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit
title_fullStr	Theoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit
title_full_unstemmed	Theoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit
title_sort	theoretical prediction of optimum chilled water distribution configuration in air conditioning terminal unit
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2019
url	https://doaj.org/article/25539d76625f4220b6e3efffdaabc565
work_keys_str_mv	AT ahmedabdmohammedsaleh theoreticalpredictionofoptimumchilledwaterdistributionconfigurationinairconditioningterminalunit AT alireyadhshabeeb theoreticalpredictionofoptimumchilledwaterdistributionconfigurationinairconditioningterminalunit
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Theoretical Prediction of Optimum Chilled Water Distribution Configuration in Air Conditioning Terminal Unit

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