Performance evaluation of radiant cooling system integrated with air system under different operational strategies

Yasin Khan; Vaibhav Rai Khare; Jyotirmay Mathur; Mahabir Bhandari

doi:10.1016/j.enbuild.2015.03.030

Performance evaluation of radiant cooling system integrated with air system under different operational strategies

Yasin Khan, Vaibhav Rai Khare, Jyotirmay Mathur, Mahabir Bhandari

Building Envelope Materials Research

Research output: Contribution to journal › Article › peer-review

90 Scopus citations

Abstract

The paper describes a study developed to estimate the energy savings potential of a radiant cooling system installed in a commercial building in India. To evaluate thermal performance and energy consumption, simulations were carried out using FLUENT and EnergyPlus software, respectively. The building model was calibrated using the measured data for the installed radiant system. Then this calibrated model was used to simulate the energy consumption of a building using a conventional all-air system to determine the proportional energy savings. For proper handling of the latent load, a Dedicated Outside Air System (DOAS) was used as an alternative to Fan Coil Unit (FCU) that was installed in conjunction with the radiant cooling system. A comparison of energy consumption calculated that the radiant system was 17.5% more efficient than a conventional all-air system and that a 30% savings was achieved by using a DOAS system compared with a conventional system. The Computational Fluid Dynamics (CFD) simulation showed that a radiant system offers more uniform temperatures, as well as a better mean air temperature range, than a conventional system. To further enhance the energy savings in the radiant system, different operational strategies were analyzed based on thermal analysis using EnergyPlus.

Original language	English
Pages (from-to)	118-128
Number of pages	11
Journal	Energy and Buildings
Volume	97
DOIs	https://doi.org/10.1016/j.enbuild.2015.03.030
State	Published - Jun 15 2015

Funding

Notice: This manuscript has been co-authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). We acknowledge financial support provided by the Department of Science and Technology, Government of India , under the US–India Centre for Building Energy Research and Development (CBERD) project. The authors also acknowledge Mr. R. Madhusudhan Rao, Oorja Energy Engg. Services Hyd. Pvt. Ltd., for providing metered energy use data and Mr. Damodhar Reddy, Tech Mahindra, for supporting the study. Funding for this project was partially provided by field work proposal CEBT105 under the Department of Energy Building Technology Activity Number BT0201000 .

Funders	Funder number
CBERD	BT0201000
US–India Centre for Building Energy Research and Development
U.S. Department of Energy
UT-Battelle	DE-AC05-00OR22725
Department of Science and Technology, Ministry of Science and Technology, India

Keywords

Building energy simulation
CFD
Energy saving
EnergyPlus
HVAC
Radiant cooling system

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.enbuild.2015.03.030

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title = "Performance evaluation of radiant cooling system integrated with air system under different operational strategies",

abstract = "The paper describes a study developed to estimate the energy savings potential of a radiant cooling system installed in a commercial building in India. To evaluate thermal performance and energy consumption, simulations were carried out using FLUENT and EnergyPlus software, respectively. The building model was calibrated using the measured data for the installed radiant system. Then this calibrated model was used to simulate the energy consumption of a building using a conventional all-air system to determine the proportional energy savings. For proper handling of the latent load, a Dedicated Outside Air System (DOAS) was used as an alternative to Fan Coil Unit (FCU) that was installed in conjunction with the radiant cooling system. A comparison of energy consumption calculated that the radiant system was 17.5% more efficient than a conventional all-air system and that a 30% savings was achieved by using a DOAS system compared with a conventional system. The Computational Fluid Dynamics (CFD) simulation showed that a radiant system offers more uniform temperatures, as well as a better mean air temperature range, than a conventional system. To further enhance the energy savings in the radiant system, different operational strategies were analyzed based on thermal analysis using EnergyPlus.",

keywords = "Building energy simulation, CFD, Energy saving, EnergyPlus, HVAC, Radiant cooling system",

author = "Yasin Khan and Khare, {Vaibhav Rai} and Jyotirmay Mathur and Mahabir Bhandari",

year = "2015",

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doi = "10.1016/j.enbuild.2015.03.030",

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AU - Khare, Vaibhav Rai

AU - Mathur, Jyotirmay

AU - Bhandari, Mahabir

PY - 2015/6/15

Y1 - 2015/6/15

N2 - The paper describes a study developed to estimate the energy savings potential of a radiant cooling system installed in a commercial building in India. To evaluate thermal performance and energy consumption, simulations were carried out using FLUENT and EnergyPlus software, respectively. The building model was calibrated using the measured data for the installed radiant system. Then this calibrated model was used to simulate the energy consumption of a building using a conventional all-air system to determine the proportional energy savings. For proper handling of the latent load, a Dedicated Outside Air System (DOAS) was used as an alternative to Fan Coil Unit (FCU) that was installed in conjunction with the radiant cooling system. A comparison of energy consumption calculated that the radiant system was 17.5% more efficient than a conventional all-air system and that a 30% savings was achieved by using a DOAS system compared with a conventional system. The Computational Fluid Dynamics (CFD) simulation showed that a radiant system offers more uniform temperatures, as well as a better mean air temperature range, than a conventional system. To further enhance the energy savings in the radiant system, different operational strategies were analyzed based on thermal analysis using EnergyPlus.

AB - The paper describes a study developed to estimate the energy savings potential of a radiant cooling system installed in a commercial building in India. To evaluate thermal performance and energy consumption, simulations were carried out using FLUENT and EnergyPlus software, respectively. The building model was calibrated using the measured data for the installed radiant system. Then this calibrated model was used to simulate the energy consumption of a building using a conventional all-air system to determine the proportional energy savings. For proper handling of the latent load, a Dedicated Outside Air System (DOAS) was used as an alternative to Fan Coil Unit (FCU) that was installed in conjunction with the radiant cooling system. A comparison of energy consumption calculated that the radiant system was 17.5% more efficient than a conventional all-air system and that a 30% savings was achieved by using a DOAS system compared with a conventional system. The Computational Fluid Dynamics (CFD) simulation showed that a radiant system offers more uniform temperatures, as well as a better mean air temperature range, than a conventional system. To further enhance the energy savings in the radiant system, different operational strategies were analyzed based on thermal analysis using EnergyPlus.

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ER -

Performance evaluation of radiant cooling system integrated with air system under different operational strategies

Abstract

Funding

Keywords

UN SDGs

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