The Input-Output Model for Solar Water Heaters: Model Errors and Long-Term Performance Estimate

1990 ◽  
Vol 112 (3) ◽  
pp. 161-168
Author(s):  
L. Kadi ◽  
B. Bourges ◽  
J. Adnot
Keyword(s):  
Test Method ◽  
Model Errors ◽  
Input Output ◽  
Solar Water ◽  
Water Heaters ◽  
Performance Estimate ◽  
Solar Water Heaters ◽  
Long Term Performance ◽  
Term Performance

Based on the experimentally observed linear relationship between the daily collected energy and the daily insolation, the development of a test method for the performance rating of solar water heaters is studied using both an analytical modeling of the daily performance and detailed simulation. This analysis has shown the existence of a general linear correlation between daily performance and external conditions (daily irradiation, ambient temperature, main’s water temperature, and storage initial temperature). Two approaches appeared possible for the long-term performance estimate and, for its simplicity, the statistical one was chosen for the definition of the European test method for solar water heaters, also known as the input-output test method.

Long term performance of evacuated tubular solar water heaters in Sydney, Australia

Solar Energy ◽  
1984 ◽  
Vol 32 (6) ◽  
pp. 785-791 ◽  
Author(s):  
G.L. Morrison ◽  
N.H. Tran ◽  
D.R. McKenzie ◽  
I.C. Onley ◽  
G.L. Harding ◽  
...  
Keyword(s):  
Solar Water ◽  
Water Heaters ◽  
Solar Water Heaters ◽  
Long Term Performance ◽  
Term Performance ◽  
Sydney Australia

Long term performance of thermosyphon solar water heaters

Solar Energy ◽  
1983 ◽  
Vol 30 (4) ◽  
pp. 341-350 ◽  
Author(s):  
G.L. Morrison ◽  
C.M. Sapsford
Keyword(s):  
Solar Water ◽  
Water Heaters ◽  
Solar Water Heaters ◽  
Long Term Performance ◽  
Term Performance

A Method for Measuring the Creep Behavior of Pressurized Polymer Tubing

2001 ◽  
Author(s):  
Chunhui Wu ◽  
Susan C. Mantell ◽  
Jane H. Davidson
Keyword(s):  
Heat Exchanger ◽  
Strain Gage ◽  
Hot Water ◽  
Test Method ◽  
Hoop Strain ◽  
Dog Bone ◽  
Thin Walled ◽  
Long Term Performance ◽  
Term Performance

Abstract Polymer components have been proposed for use in domestic solar hot water heating systems. A polymer heat exchanger is under development for such systems. For heat transfer considerations, the heat exchanger will be comprised of many thin walled tubes. The heat exchanger must survive 10 years of service at high pressure (1.55 MPa) and high temperature (82°C). A novel method has been developed for evaluating the long term performance (creep) of the polymer tubing. Traditional creep testing, performed with dog bone test specimens can not be applied because the thin walled tubing has anisotropic material properties. Consequently, performance must be evaluated directly on the extruded tubing. The method entails wrapping a Constantan wire around the tube specimen to continuously record the hoop strain. For pressure loading of tubing, this method offers significant improvements over strain gage instrumentation. In this paper, the test method is described, an analysis of the strain transfer between the tubing and wire wrap is presented, and strain data for polypropylene tubing measured with a strain gage and wire wrap are compared. The data show that the wire measurement method can be successfully used for the characterization of long term mechanical behavior of polymer tubes.

scholarly journals Test Method and Compact Facility for Thermal Performance and Energy Efficiency Grades of Compact Solar Water Heaters

2012 ◽  
Vol 30 ◽  
pp. 1365-1371 ◽  
Author(s):  
He Tao ◽  
Zhang Lei ◽  
Deng Yu ◽  
Huang Zhulian ◽  
Wang Xuan ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Thermal Performance ◽  
Test Method ◽  
Solar Water ◽  
Water Heaters ◽  
Solar Water Heaters
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