Heat transfer and cooling characteristics of concrete ceiling radiant cooling panel

A dynamic simplified model of radiant ceiling cooling integrated with underfloor ventilation system

“…Referring to the simplification of heat transfer model for pipeembedded structure [22][23][24][25][26][27][28][29], water is regarded as a cooled source, and R 2 is considered since there is direct heat conduction through pipe layer. The sum of R 3 and R 4 in series is connected with R 2 in parallel.…”

“…Recently, Fonseca et al [26,27] proposed a dynamic RC-network model of radiant ceiling panels coupled to its environment. And Su et al [28] presented a two dimensional steady-state heat transfer model of concrete ceiling radiant cooling panel by using FDM. However, up to now, seldom researches have been conducted on a dynamic simplified RC-network model of RCCUV system, which is proposed and validated in this paper.…”

“…There have been considerable amount of research on heat transfer model of radiant cooling system and pipe-embedded building envelope [18][19][20][21][22][23][24][25][26][27][28]. Antonopoulos [18] developed a steady-state model for wall temperature field analysis.…”

Modelling and experimental study of low temperature energy storage reactor using cementitious material

“…Concrete solutions for thermal energy storage are usually based on sensible heat transfer and thermal inertia [5,6], and sometimes they are enhanced with PCMs solutions [7,8]. An ettringite based material, capable of storing thermal energy by a reversible dehydration/hydration cycle, was produced by hydration of a mixture of sulfoaluminate clinker, anhydrite and aluminium powder [9].…”

A Study on the Status and Thermal Environment Improvement of Ceiling-Embedded Indoor Cooling and Heating Unit

“…The ceiling-embedded indoor unit has the advantage of increasing efficiency of indoor space since it is possible not only to configure it to the thermal distribution system of various cooling and heating heat sources such as air conditioners, multi-system air conditioners and heat pump fan coil units but also to embed the indoor unit, the power line, the cooling and heating supply piping and other required materials. [1][2] [3] [4] In addition, in the case of the multi-system air conditioner that mainly uses the ceiling-embedded indoor unit, since it is easy to additionally install in the existing building and the area required to install the system is small, its installation and supply continues to expand not only from small and mid-sized office buildings but also to schools, shops and homes. [5] However, for ceiling-embedded indoor units that are currently commercially available, thermal comfort may partially drop due to cool draft and warm draft effects caused by dropped airflow at the air inlet, and most of all, it has a drawback in that the thermal comfort may become extremely bad due to unbalanced indoor temperature caused by temperature stratification in the winter.…”