Radiant Cooling System without Any Energy Input
Abstract
Efficient cooling and heating solutions for nearly zero-energy solar dwellings are requested to mitigate environmental problems, and sustainable dwellings nowadays. A radiant heating system, which is used only for space heating during the heating period, can be used also to cool the room just by the enthalpy use of the natural city water without any waste of water by flowing the natural water through the embedded pipeline already installed for the radiant heating. The natural water used for radiant cooling can be used at the necessary places such as toilets flushing, car washing, washing machine, and garden water. As a result, the embedded pipe of the radiant heating can be used for a radiant cooling system with a minimum installation without any energy input. Thermal comfort and behavior analyses in an enclosure with a radiant heating and cooling system are fulfilled by experiment, mean radiant temperature simulation, and asymmetric radiation calculation. The radiant cooling system by the use of natural city water could be a nice solution for a comfortable and reasonable zero energy dwelling. No extra cooling energy and power are requested to cool the space by the use of enthalpy and pressure from the natural city water.