Portable condensation-free temperature-adjustable radiant cooling board system

Abstract

The present invention provides a portable condensation-free temperature-adjustable radiant cooling board system. The system includes a supporting panel, a movable stand holding the supporting panel and an angle-adjuster. The supporting panel includes at least one water pipe layer, at least one insulation layer on one side of the at least one water pipe layer, at least one high emissivity radiative layer on the other side of the at least one water pipe layer and at least one low humidity layer in front of the at least one high emissivity radiative layer. The invented PRCB has high flexibility in the creation and adjustment of microthermal environments for diverse personal thermal comfort requirements, thus broaden the applicability of PRCSs in hot and humid climates.

What is claimed is: 
     
         1 . A portable condensation-free temperature-adjustable radiant cooling board system comprising
 a supporting panel, the supporting panel having a multi-layer structure comprising:
 at least one water pipe layer covered with at least one thermally-conductive conforming layer; 
 at least one insulation layer on one side of the at least one water pipe layer; 
 at least one high emissivity radiative layer on the other side of the at least one water pipe layer, the high-emissivity radiative layer creating a radiant cooling surface with an adjustable temperature range between 5° C. and 20° C.; 
 at least one low humidity layer in front of the at least one high emissivity radiative layer, sealed by an infrared-transparent membrane over a radiant cooling surface in conjunction with at least one side frame, with desiccant materials positioned on the at least one side frame to maintain dryness within the air-layer, the low humidity layer having a humidity of less than 35% such that the radiant cooling board system does not generate condensation; 
   a movable stand holding the supporting panel; and   an angle-adjuster for user-selected change of a facing angle (θ) of the supporting panel towards the user.   
     
     
         2 . The condensation-free temperature-adjustable radiant cooling board system of  claim 1 , wherein the at least one water pipe layer comprises supply fluid capillaries and return fluid capillaries. 
     
     
         3 . The condensation-free temperature-adjustable radiant cooling board system of  claim 1 , wherein the at least one high emissivity radiative layer is a thin metal layer coated with a high emissivity radiative paint. 
     
     
         4 . The condensation-free temperature-adjustable radiant cooling board system of  claim 3 , wherein the thin metal layer has a thickness in a range of 0.08-0.10 mm. 
     
     
         5 . The condensation-free temperature-adjustable radiant cooling board system of  claim 3 , wherein the at least one high emissivity radiative layer comprises a graphene carbon nanotube coating with an emissivity of 0.95-0.98. 
     
     
         6 . The condensation-free temperature-adjustable radiant cooling board system of  claim 1 , wherein the infrared transparent membrane has a thickness of 0.015-0.02 mm. 
     
     
         7 . The condensation-free temperature-adjustable radiant cooling board system of  claim 1 , wherein the infrared transparent membrane is made from pure low-density polyethylene (LDPE). 
     
     
         8 . The condensation-free temperature-adjustable radiant cooling board system of  claim 1 , wherein the infrared transparent membrane has a transmittance rate of at least 80% for infrared waves within the wavelength range of 2.5-22 μm. 
     
     
         9 . The condensation-free temperature-adjustable radiant cooling board system of  claim 1 , wherein the low humidity layer has a thickness ranging from 5-10 cm. 
     
     
         10 . The condensation-free temperature-adjustable radiant cooling board system of  claim 1 , wherein the facing angle (θ) is in a range of 60-90 degrees. 
     
     
         11 . The condensation-free temperature-adjustable radiant cooling board system of  claim 1 , wherein the portable condensation-free temperature-adjustable radiant cooling board system has an inlet for receiving chilled water and an outlet for returning the water to a chiller. 
     
     
         12 . A method for accommodating diverse individual thermal comfort preferences in hot and humid climates, comprising installing at least one condensation-free temperature-adjustable radiant cooling board system of  claim 1  on each side of a user to create a microthermal environment, wherein a distance between the condensation-free temperature-adjustable radiant cooling board system and the user is defined as “D”, and the D is in a range of 60-90 cm, and wherein the supporting panel is mounted on a movable stand, and an angle-adjuster is used for user-selected change of a facing angle (θ) of the supporting panel towards the user. 
     
     
         13 . The method of  claim 12 , wherein the facing angle (θ) is in a range of 60-90 degrees. 
     
     
         14 . The method of  claim 12 , wherein a radiant cooling surface on the condensation-free temperature-adjustable radiant cooling board has a temperature ranging between 5° C. and 20° C. when utilizing the supporting panel. 
     
     
         15 . The method of  claim 12 , further comprising introducing supply water and return water into the at least one condensation-free temperature-adjustable radiant cooling board system.