Heat Transfer of Polyolefin Covered STS Corrugated Tube for Surface Water Source Heat Pump

2018 ◽  
Vol 12 (4) ◽  
Keyword(s):  
Heat Transfer ◽  
Surface Water ◽  
Heat Pump ◽  
Water Source ◽  
Corrugated Tube

scholarly journals Heat transfer on grooved high density poly ethylene tube for surface water source heat pump

2014 ◽  
Vol 18 (4) ◽  
pp. 1327-1341 ◽  
Author(s):  
Gun Jung ◽  
Geun Oh ◽  
Chul Chung ◽  
Han Kim
Keyword(s):  
Heat Transfer ◽  
Surface Water ◽  
Heat Pump ◽  
Water Source ◽  
High Density ◽  
Smooth Tube ◽  
Cross Sectional ◽  
U Value ◽  
Poly Ethylene ◽  
The Heat Transfer Coefficient

High density polyethylene (HDPE) tube has been successfully utilized in surface water source heat pump (SWSHP) system as a surface water heat exchanger (SWHE). Since the heat transfer coefficient (U value) of the HDPE tube directly affects performance and energy efficiency of SWSHP, this research aims to increase U value of HDPE tube by grooving external surface of conventional 32A HDPE tube to reducing cross sectional volume. The final shape of grooved HDPE tube is similar to that of fin. In order to verify the performance of grooved HDPE tube, the U values of grooved and smooth tube were compared experimentally. According to the results, U value of grooved tube showed approximately 21.5% increase with natural convection and 23.5% with forced convection system than U values obtained from smooth tube. The reason for such increase in U value was found to be the reduction in cross sectional volume of the HDPE tube.

Experimental investigation on water quality standard of Yangtze River water source heat pump

2012 ◽  
Vol 66 (5) ◽  
pp. 1103-1109 ◽  
Author(s):  
Zenghu Qin ◽  
Mingwei Tong ◽  
Lin Kun
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
River Water ◽  
Heat Pump ◽  
Yangtze River ◽  
Water Source ◽  
Quality Standard ◽  
Heat Pumps ◽  
The Yangtze River ◽  
Water Conditions

Due to the surface water in the upper reaches of Yangtze River in China containing large amounts of silt and algae, high content of microorganisms and suspended solids, the water in Yangtze River cannot be used for cooling a heat pump directly. In this paper, the possibility of using Yangtze River, which goes through Chongqing, a city in southwest China, as a heat source–sink was investigated. Water temperature and quality of the Yangtze River in the Chongqing area were analyzed and the performance of water source heat pump units in different sediment concentrations, turbidity and algae material conditions were tested experimentally, and the water quality standards, in particular surface water conditions, in the Yangtze River region that adapt to energy-efficient heat pumps were also proposed. The experimental results show that the coefficient of performance heat pump falls by 3.73% to the greatest extent, and the fouling resistance of cooling water in the heat exchanger increases up to 25.6% in different water conditions. When the sediment concentration and the turbidity in the river water are no more than 100 g/m3 and 50 NTU respectively, the performance of the heat pump is better, which can be used as a suitable river water quality standard for river water source heat pumps.

Simulation and analysis on thermodynamic performance of surface water source heat pump system

2016 ◽  
Vol 10 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Nan Lv ◽  
Qing Zhang ◽  
Zhenqian Chen ◽  
Dongsheng Wu
Keyword(s):  
Surface Water ◽  
Heat Pump ◽  
Water Source ◽  
Pump System ◽  
Heat Pump System ◽  
Thermodynamic Performance

Study on the Maximum Installed Capacity of Surface Water Source Heat Pump System

2011 ◽  
Vol 368-373 ◽  
pp. 3853-3856
Author(s):  
Jin Mei Feng ◽  
Jian Min Gao ◽  
Paul Woods
Keyword(s):  
Surface Water ◽  
Heat Pump ◽  
Large Scale ◽  
Water Source ◽  
Mathematic Model ◽  
Pump System ◽  
Heat Pump System ◽  
Maximum Water ◽  
Set Up ◽  
Installed Capacity

The maximum installed capacity mathematic model has been set up and analysis about surface water source heat pump using at large scale. The maximum installed capacity of Nu River China has been calculated by the equations as an example. In the mean time, the key coefficients have been simplified while practical application in engineering. A general conclusion of the maximum water source heat pump installed capacity has obtained for different surface water characteristic. The value from the general conclusion can use in the plan and the layout on the surface water source heat pump system large-scale use. That will protect ecological environment and against creates the destruction.

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