An experimental study of the transient response of a radiant panel ceiling and enclosure
The transient responses of a radiant heating system and enclosure was investigated for a range of hot-water supply temperatures and flow rates. The radiant heating system consisted of copper tubes embedded in a standard plaster ceiling at 6-in (152-mm) intervals. Transient experiments were performed by heating the radiant ceiling and enclosure from a cooled-down condition by using a step change in the hot-water supply temperature. Temperature transients in the water supply and return lines on the ceiling and wall surfaces and in the room air were then monitored for a period of several hours. Results were as follows: the ceiling temperature was uniform; the thermal response of the ceiling and enclosure was slow because of the large thermal mass in the ceiling; the air temperature did not lag the wall and floor temperature; and the room walls were heated by a combination of radiation heat transfer from the ceiling and convection heat transfer from the air. In addition, the transient response of the radiant system was found to be a function of water supply temperature but not of water flow rate.
- Research Organization:
- Mechanical Engineering Dept., Iowa State Univ., Ames, IA (US)
- OSTI ID:
- 6911991
- Report Number(s):
- CONF-8606125-
- Journal Information:
- ASHRAE Trans.; (United States), Journal Name: ASHRAE Trans.; (United States) Vol. 92:2A; ISSN ASHTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
320107 -- Energy Conservation
Consumption
& Utilization-- Building Systems-- (1987-)
APPLIANCES
CEILINGS
CONVECTION
COPPER
EFFICIENCY
ELEMENTS
ENERGY TRANSFER
HEAT GAIN
HEAT TRANSFER
HEATERS
HOT WATER
HYDROGEN COMPOUNDS
MASS TRANSFER
METALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PIPES
RADIANT HEAT TRANSFER
THERMAL CONDUCTIVITY
THERMAL EFFICIENCY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
WATER
WATER HEATERS