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- Title
Experimental evaluation of thermal characteristics of wall mounted radiant cooled environment with ceiling fan.
- Authors
Arumugam, Jayashree; Maiya, M P; Shiva Nagendra, S M
- Abstract
Worldwide the radiant cooling system is used as an energy-efficient alternative to conventional air conditioning systems. Understanding the heat extraction characteristics of the radiant cooling system is necessary to understand the system's thermal performance. The radiant cooling system's heat extraction characteristic differs from conventional air conditioning system. The predominant form of heat transfer is through radiation, that is more than 50% of heat transfer takes place by radiation. In this study, the focus is to evaluate the heat extraction characteristic of the radiant cooling system by varying panel position, area of cooling panel, water mass flow rate, and water set temperature. The ratio of radiative heat flux to total heat flux (qr/qtot) is used to evaluate the system's thermal characteristics. The study's outcome indicates that the radiative heat transfer coefficient (hr) varies from 5.7 to 6.03 W/m2 K throughout the experimental study, indicating that the hr value remains relatively constant. The study shows that at steady state, increase in mass flow rate of water and water set temperature increases the percentage of radiative heat flux to total heat flux (qr/qtot). At steady state, increase in area of radiant cooling panel decreases the ratio of qr/qtot. The radiant cooling panel area restricts the cooling capacity of a radiant cooling system. The cooling capacity can be enhanced for a given area of radiant cooling system by adding fins to the radiant panel or by increasing convective heat transfer. In this study, the cooling capacity of the radiant cooling system is enhanced using a ceiling fan. The outcome shows that when Wall B is active at Tw of 25 °C, there is a 19% increase in the cooling capacity of the radiant cooling system as air velocity in the chamber increases from 0 to 0.95 m/s.
- Subjects
HEAT radiation &; absorption; HEAT convection; HEAT transfer coefficient; CEILING fans; HEAT flux; NANOFLUIDICS
- Publication
Sādhanā: Academy Proceedings in Engineering Sciences, 2024, Vol 49, Issue 2, p1
- ISSN
0256-2499
- Publication type
Article
- DOI
10.1007/s12046-024-02480-5