Abstract
In this paper, a novel combined radiation-convection floor heating system is shown. This study uses practice-based learning and investigated the thermal performance of a combined radiation-convection floor heating system with a water heat pump system by evaluating the thermal environment and energy consumption in an experimental test. A new method that analyzed the thermal performance of four different controls was developed and applied. The results of the surface temperature distributions demonstrated that Mode 1, which uses only convection, had the lowest floor temperature and was thus considered inappropriate for occupants who sleep on the floor. By contrast, Modes 2, 3, and 4 showed high floor surface temperatures as hot water was supplied to the radiant heating panel. The predicted mean vote (PMV) results suggest that radiant floor heating is not appropriate for intermittent heating. In other words, occupants of single residences who return home at night will experience a long period of discomfort if they heat their room using floor heating. In this case, Mode 1, which is convection heating, and Modes 3 and 4, which represent mixed modes provide a more comfortable environment. The difference between this experimental study and previous research is that four different control modes for a combined radiation-convection system were evaluated based on the same location of the equipment in a laboratory. Furthermore, we studied the long-term real-scale thermal performance using panel and energy consumption.
Highlights
IntroductionDeveloped countries, including Europe, are introducing new energy conservation measures to reduce greenhouse gases through climate change conventions
ThisMode means that these surface temperatures as hot water 2 is and supplied to the floor panel
The results were consistent with the characteristics of the general convection heating system and radiant heating system
Summary
Developed countries, including Europe, are introducing new energy conservation measures to reduce greenhouse gases through climate change conventions. In South Korea, the government has mandated that all buildings be zero-energy by 2025. This has prompted the household sector to improve the energy efficiency of heating systems in single and multi-family homes. Radiant heating systems are commonly used in South Korea and are operated in many other countries as well [1,2,3,4,5]. The radiant heating systems in South Korea are appropriate for the traditional sedentary lifestyle and are highly effective in ensuring continuous heating throughout the day [6]
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