Circulating Water Cooling System with applying Hydraulic Energy and Temperature
Date Issued
2011
Date
2011
Author(s)
Liu, Shing-Han
Abstract
Tap-Water Radiant Cooling System is a mechanism with cooling effect that cold water flows in the pipe to cool down the surface followed by radiant cooling and natural convection effect to lower the surrounding temperature even more. In the research, for the purpose of enhancing cooling capacity, this research emphasizes on alternative designs to improve temperature distribution uniformity as well as applies hydraulic fan to generate forced convection intent to replace natural convection.
This research divided in three part. First of all, running only with Radiant Cooling System, compare different outcomes from indoor measures of total cooling capacity and of cooling tons per unit area of pipe under various temperatures and water-flow-way mode. According to the experiment, cooling capacity is better under 18℃ and the water-flow-way mode is in parallel than 20℃ and water-flow-way mode is in series. Furthermore, cooling tons per unit area of pipe could be raised by roughly 33%.
The next step is to discuss the efficiency of hydraulic fan in different water flow rate. Based on the experiment, for the sake of at least 400rpm of rotary speed, the water flow rate of hydraulic fan must be greater than 16LPM. Once it is accomplished, efficiency of hydraulic fan would be higher than 90%.
Third, through the combination of the previous two parts, compare disparate results from outdoor measures of total cooling capacity and of cooling tons per unit area of pipe under various temperatures and enhancing efficiency. Depending on the experiments, cooling capacity reaches to the best level when water flow rate of tube is 10LPM along with 99rpm of rotary speed of hydraulic fan. Cooling tons per unit area of pipe could be elevated by around 44.4% compared to that without hydraulic fan.
The patent of this study is applied.
Fluid actuator with the tube of hot and cold external fluid pump discharge
(Patent Taiwan: 12/953.521)
Subjects
Radiant cooling
Cooling capacity
Effectivenes
Forced convection
Hydraulic fan
Type
thesis
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