A field study on indoor environmental quality and energy savings of an office building integrated with underfloor air conditioning system in India

Lakshmanan, Ramesh Krishnan; Lachireddi, Gangadhara Kiran Kumar

doi:10.1080/23744731.2022.2120348

Science and Technology for the Built Environment

2022

DOI: 10.1080/23744731.2022.2120348

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A field study on indoor environmental quality and energy savings of an office building integrated with underfloor air conditioning system in India

Ramesh Krishnan Lakshmanan

Gangadhara Kiran Kumar Lachireddi

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2024

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Cited by 1 publication

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Numerical Investigation of the Indoor Environmental Factors With Stratum and Underfloor Air Distribution Systems in an Educational Institute Computer Laboratory

Lakshmanan,

Lachireddi

2024

Journal of Thermal Science and Engineering Applications

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Ventilation with optimal airflow patterns is the most significant aspect in controlling airborne transmission as well as providing an improved indoor thermal environment and air quality in an energy-efficient way. Conducting the air-conditioned computer laboratory in educational institutes during the pandemic is challenging. This article presents a comparative study on various aspects related to indoor environmental quality factors, including thermal comfort indices, vertical air temperature differences, air distribution effectiveness, CO2 concentration levels, energy-saving, and dispersion of exhaled droplets of aerosols in different sizes (0.5μm, 6μm, 20μm, and 45μm). The study examines these factors by comparing twelve cases with different air distribution strategies, air change rates (15 and 20 ACH), and return outlet positions (1.3m, 1.8m, and 2.3m). The numerical investigation is carried out in the educational institute computer laboratory model with the dimensions of 10m (length), 5m (width) and 3m (height). The findings indicated that stratum ventilation and underfloor air distribution at a rate of 20 air changes per hour, along with the placement of the return outlet in position 2, would ensure adequate ventilation, acceptable thermal comfort, and optimal energy savings. Compared to the overhead air distribution system, the maximum energy savings were obtained at 10.15% and 10.07% in both stratum and underfloor air distribution system. Furthermore, the higher air distribution index and ventilation parameter was acquired in UFAD system at 20 ACH. This study provides a better understanding of air distribution system and aerosol particle dispersion in the indoor environment of a computer laboratory.

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Numerical Investigation of the Indoor Environmental Factors With Stratum and Underfloor Air Distribution Systems in an Educational Institute Computer Laboratory

Lakshmanan,

Lachireddi

2024

Journal of Thermal Science and Engineering Applications

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show abstract

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A field study on indoor environmental quality and energy savings of an office building integrated with underfloor air conditioning system in India

Cited by 1 publication

References 40 publications

Numerical Investigation of the Indoor Environmental Factors With Stratum and Underfloor Air Distribution Systems in an Educational Institute Computer Laboratory

Numerical Investigation of the Indoor Environmental Factors With Stratum and Underfloor Air Distribution Systems in an Educational Institute Computer Laboratory

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