Abstract
In this paper we proposed the novel air-conditioning system which combined induction ventilation and radiant air-conditioning. The indoor terminal device is the radiant induction-unit (RIDU). The RIDU is the induction unit combined with the pore radiant panel on which the copper pipes with rigid aluminum diffusion fins are installed. The two-stage evaporator chiller with the non-azeotropic mixture refrigerant is utilized in the system to reduce the initial investment in equipment. With the performance test and the steady state heat transfer model based on the theory of radiative heat transfer, the relationship between the induction ratio of the RIDU and the characteristic of the air supply was studied. Based on this, it is verified that the RIDU has a lower dew-point temperature and better anti-condensation performance than a traditional plate-type radiant panel. The characteristics of the radiation and convection heat transfer of the RIDU were studied. The total heat exchange of the RIDU can be 16.5% greater than that of the traditional plate-type radiant terminal.
Highlights
Radiant air-conditioning attracted widespread attention and has been gradually developed for its comfort and better energy efficiency [1,2]
Since the indoor thermal comfort was enhanced by the radiant air-conditioning and the indoor air quality was improved by the dedicated outdoor air, the hybrid system had potential of improving energy efficiency, and created a healthier and more comfortable indoor environment than traditional air-conditioning systems [8,11]
With the steady state heat transfer model based on the theory of radiative heat transfer, relationship between the induction ratio of the radiant induction-unit (RIDU) and the characteristic of the relationship between the induction ratio of the radiant induction-unit (RIDU) and the the air supply was studied and the experiments were carried out
Summary
Radiant air-conditioning attracted widespread attention and has been gradually developed for its comfort and better energy efficiency [1,2]. Scholars have proposed to combine the radiation air-conditioning and dedicated outdoor air system to form a hybrid system which can control the temperature and humidity independently [8,9,10]. With the steady state heat transfer model based on the theory of radiative heat transfer, relationship between the induction ratio of the radiant induction-unit (RIDU) and the characteristic of the relationship between the induction ratio of the radiant induction-unit (RIDU) and the the air supply was studied and the experiments were carried out. The anti-condensation characteristic of the air supply was studied and the experiments were carried out. The performance, characteristics of radiation, and convection heat transfer of the RIDU were studied and anti-condensation performance, characteristics of radiation, and convection heat transfer of the RIDU compared with theand traditional radiant air-conditioning.
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