Ten questions about radiant heating and cooling systems

다국어 초록 (Multilingual Abstract)

<P><B>Abstract</B></P> <P>Radiant heating and cooling (RHC) systems are being increasingly applied not only in residential but also in non-residential buildings such as commercial buildings, education facilities, and even large scale buildings such as airport terminals. Furthermore, with the combined ventilation system used to handle latent load, the radiant cooling system has proven applicable in hot and humid climates. It is well known that the RHC system has advantages of low draught risk, quiet operation, low energy consumption, and ability for design integration with building elements. These merits have motivated numerous studies on RHC systems in terms of comfort, heat transfer analysis, energy simulation, control strategy, system configurations and so on. Many studies have demonstrated that the RHC system is a good solution to improve indoor environmental quality while reducing building energy consumption for heating and cooling. On the other hand, the RHC system has limitations such as complicated control of Thermally Activated Building System (TABS), acoustical issues, higher capital cost and cooling load than conventional air systems, and so on. For now, the required mitigation of these limitations and the need to extend the applicability of the RHC system are providing the continuous impetus for research on RHC systems. This paper summarizes the important issues involved in the research on RHC system, whereby ten questions and answers concerning the RHC system are discussed, which will help researchers to conduct relevant studies.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The paper addresses ten essential questions on radiant heating and cooling systems. </LI> <LI> Advantages and limitations of the radiant heating and cooling system are discussed. </LI> <LI> Previous studies on the evaluation of system performance are revisited. </LI> <LI> Current issues on controls for reducing energy and condensation risk are raised. </LI> <LI> The authors suggest future research topics on the radiant heating and cooling systems. </LI> </UL> </P>