Performance analysis of passive thermosiphon beams

Abstract

HVAC systems have been well known for many years, which have been developed the variety of innovative products integrating with the HVAC system. The most popular system, VAV (Variable Air Volume) system that has been well implied into the most of market application such as hotel, commercial office and healthcare. However, if a poorly designed duct system will cause cool air dumpling. Another popular system is the traditional air-conditioning system. It brings thermal comfort for the human. However, the drawback is too much energy consumption. Especially, with the trend of advocation of energy saving, numerous environmentally friendly products had been born modernly such as passive/active thermosiphon beam system which is occupied the largest market in Europe. Generally, passive thermosiphon beams also called passive chilled beams. The working principle of them is similar. Passive thermosiphon beams offset the certain drawbacks from VAV system and air-conditioning system, the detail interpretation and analysis will be stated according to the experimental results. The performance test of the passive thermosiphon beams will be conducted at Energy Research Institute Lab @NTU, and the raw data were measured by high accuracy sensing devices and then logged and represented in LabVIEW and BSTAR