Experimental Study of a Self-Pumping Boiling Collector Solar Hot Water System

1989 ◽  
Vol 111 (3) ◽  
pp. 211-218 ◽  
Author(s):  
J. H. Davidson ◽  
H. A. Walker ◽  
G. O. G. Lo¨f
Keyword(s):  
Experimental Study ◽  
Vapor Pressure ◽  
Water System ◽  
Heating System ◽  
Hot Water ◽  
The Self ◽  
Operating Characteristics ◽  
Pumping System ◽  
Fort Collins ◽  
Mechanical Pump

Results of an experimental study of a full-scale passive solar hot water heating system utilizing a boiling collector are presented. The self-pumping system alternates between two modes of operation. During the run cycle, vapor pressure drives the evaporated refrigerant downward from the collector to the condenser. Once a preset quantity of refrigerant is condensed, vapor pressure is again used to force the return of the condensate to the collector during the pump cycle. In order to assess the thermal penalty of self-pumping operation, the system is also operated with a mechanical pump. Daily operating characteristics and seasonal performance are discussed. Performance of the self-pumping system is strongly influenced by the duration of the pump cycle. The average thermal loss attributed to self-pumping during one heating season in Fort Collins, Colo. is approximately nine percent of the solar energy incident on the collector. Refinement of the system design, including individual components, is required to reduce losses and improve performance.

An Experimental Study of Different Thermal Boxes Heated by Solar Thermal Radiation for Hot Water System at Night

2013 ◽  
Vol 315 ◽  
pp. 788-792
Author(s):  
M.Yaakob Yuhazri ◽  
A.M. Kamarul ◽  
Sihombing Haeryip ◽  
S.H. Yahaya ◽  
Raja Izamshah
Keyword(s):  
Energy Source ◽  
Experimental Study ◽  
Water System ◽  
Heating System ◽  
Black Body ◽  
Hot Water ◽  
Water Heating ◽  
Trapped Air ◽  
Current Water ◽  
Tropical Weather

This research is related to thermal efficient water heating system, specifically to improve the water heating system that exists nowadays. The goal of this research is to improve the current water heating system by using solar heat as the energy source to heat the water. The focus is to improve the thermal efficiency by adding different thermal boxes as the absorber bed. By implementing the black body and radiation concept, the air trapped in the box is heated. The trapped air then increases the collisions between the molecules and directly increases the temperature inside the box, higher than the outside environment. Based on night experimental results revealed steel thermal box is better to be used for tropical weather like Malaysia.

Problem about Solar Water Heating System and Residential Building Integrated

2012 ◽  
Vol 193-194 ◽  
pp. 30-33
Author(s):  
Xue Ying Wang ◽  
Dong Xu ◽  
Ya Jun Wu
Keyword(s):  
Solar Energy ◽  
Integrated Design ◽  
Water System ◽  
Residential Building ◽  
Heating System ◽  
Hot Water ◽  
Solar Water Heating ◽  
Drainage Design ◽  
Hot Water Supply ◽  
Solar Water Heating System

This article analyzes the problem in application the solar system was used in residential building, puts forward the requirements to use energy and choose the setting of the solar energy collector from two aspects of building and drainage design respectively. In addition, the article explicates andthe solar energy collector and building integrated design and the development of solar energy collector. At last, the article puts forward some Suggestions on the improvement and development of residential solar hot water system and the design of the hot water supply bath solution of practice to make solar energy and low power assisted by night combining.

An Experimental Study of Different Thermal Boxes Heated by Solar Thermal Radiation for Hot Water System at Daytime

2013 ◽  
Vol 315 ◽  
pp. 783-787
Author(s):  
M.Yaakob Yuhazri ◽  
A.M. Kamarul ◽  
A.H. Rahimah ◽  
Sihombing Haeryip ◽  
S.H. Yahaya
Keyword(s):  
Energy Source ◽  
Water System ◽  
Heating System ◽  
Black Body ◽  
Hot Water ◽  
Experimental Result ◽  
Water Heating ◽  
Trapped Air ◽  
Current Water ◽  
Tropical Weather

This research is related to thermal efficient water heating system, specifically to improve the water heating system that exists nowadays. The goal of this research is to improve the current water heating system by using solar heat as the energy source to heat the water. The focus is to improve the thermal efficiency by adding different thermal boxes as the absorber bed. By implementing the black body and radiation concept, the air trapped in the box is heated. The trapped air then increases the collisions between the molecules and directly increases the temperature inside the box, higher than the outside environment. Based on a daytime experimental result revealed steel thermal box is better to be used for tropical weather like Malaysia.

Research at the Building Research Establishment into the applications of solar collectors for space and water heating in buildings

1980 ◽  
Vol 295 (1414) ◽  
pp. 403-414
Keyword(s):  
Solar Collector ◽  
Water System ◽  
Cost Effective ◽  
Heating System ◽  
Field Studies ◽  
Hot Water ◽  
Solar Collectors ◽  
Water Heating ◽  
Actual Performance ◽  
Low Efficiency

A completed study of a solar hot water heating system installed in a school showed an annual average efficiency of 15%, the low efficiency largely caused by the unfavourable pattern of use in schools. Field studies, in 80 existing and 12 new houses, of a simple domestic hot water system have been initiated to ascertain the influence of the occupants on the actual performance of solar collector systems. The development of testing methods of solar collectors and solar water heating systems is being undertaken in close collaboration with the B.S.I. and the E.E.C. Solar space heating is being investigated in two experimental low energy house laboratories, one using conventional solar collectors with interseasonal heat storage and the other a heat pump with an air solar collector. Studies of the cost-effectiveness of solar collector applications to buildings in the U.K. show that they are far less cost-effective than other means of conserving energy in buildings.

Theory of Solar Hot Water System Construction Application Engineering Evaluation Field Test Method - The Amount of Solar Irradiance Intercept Method

2015 ◽  
Vol 737 ◽  
pp. 71-75
Author(s):  
Hong Wei Gong ◽  
Zhong Yuan Wang ◽  
Xuan Yan ◽  
Huan Fu
Keyword(s):  
Solar Radiation ◽  
Water System ◽  
Heating System ◽  
Hot Water ◽  
Test Method ◽  
System Construction ◽  
Radiation Interception ◽  
Test Application ◽  
Energy Efficiency Evaluation ◽  
Solar Water Heating System

In the energy efficiency evaluation of renewable energy, in order to confirm the application of solar hot water system of building practical application effect, on-site testing is needed for solar water heating system. During the short term test, in order to improve the testing progress and to reduce the input, the relevant standard proposes the "solar radiation interception method". This paper mainly contrasts and analyzes the results deviation of "solar radiation interception method" in the actual test application. It also improveds the testing methods and testing precision.

Comparisons of Measured and Simulated Performance for CSU House I

1980 ◽  
Vol 102 (3) ◽  
pp. 192-195 ◽  
Author(s):  
J. W. Mitchell ◽  
W. A. Beckman ◽  
M. J. Pawelski
Keyword(s):  
System Analysis ◽  
Storage System ◽  
Water System ◽  
Simulation Models ◽  
Heating System ◽  
Daily Basis ◽  
Hot Water ◽  
Weather Data ◽  
Determine Parameter ◽  
Domestic Hot Water

The heating system for CSU House I is simulated using TRNSYS, and simulation results are compared to the measured performance. The heating system is composed of a liquid collection and storage system, a domestic hot water system, and an air delivery system. The components were modeled using standard TRNSYS components. Measured weather data from the site were employed as the driving function. Measured energy quantities, including the useful gain from solar, that supplied to the house and the domestic hot water system, and the auxiliary were compared to those from the simulation for three periods of six to eleven days each. Comparisons were made on both a daily basis and over the entire period. The simulated energy quantities are found to agree with the data within the accuracy of the measurements. Simulated hourly values of storage tank temperatures are compared to those measured. Although there are differences of up to 5°C between the two at times, the agreement is generally within 2°C. These results help establish the validity of simulation methods for system analysis. Conventional engineering techniques can be used to formulate component models and determine parameter values. Verified simulation models can be then used to predict long term system performance.

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