Cooling performance test and analysis of a radiant–convective air-conditioning terminal device with parallel pipes

Natural heat transfer air-conditioning terminal device and its system configuration for ultra-low energy buildings

“…Figure 1. The natural heat transfer air-conditioning terminal device Except literature [10], few research was found on such kind of air-conditioning terminal device that can supply both space heating and cooling (sensitive and latent) only by radiation and natural convection heat transfer. So comparison will be made between the NHTACTD and other air-conditioning terminals currently used in the HVAC systems and the comparative advantages of the NHTACTD will be specially emphasized.…”

“…As it is known that the air-conditioning terminal devices of an HVAC system not only dissipate almost all the heating/cooling energy, but also play an important role in the occupants' thermal comfort, so here, the focus is laid on the air-conditioning terminal devices for ultra-low energy buildings. Apart from the air-conditioning terminals that are currently used in buildings like fan coil units, radiant heating/cooling panels, chilled beams, etc., the authors brought out a radiant-convective air-conditioning terminal device [10] that is especially suitable for the buildings featuring low heating/cooling load and high indoor thermal comfort. The terminal air-conditioning device presented by the authors is shown in Figure 1 and it mainly consists of multiple heat transfer pipes in vertical parallel arrangement with a condensate discharge pan underneath.…”