scholarly journals Artificial intelligence techniques based on aquaculture solar thermal water heating system control

2011 ◽  
pp. 1027-1034
Author(s):  
Doaa M. Atia ◽  
Faten H. Fahmy ◽  
Ninet M. Ahmed ◽  
Hassen T. Dorrah
Keyword(s):  
Artificial Intelligence ◽  
Thermal Water ◽  
Heating System ◽  
Solar Thermal ◽  
System Control ◽  
Water Heating ◽  
Artificial Intelligence Techniques

Cost-Effectiveness of a Photovoltaic-Powered Heat Pump Water Heating System vs. Solar Thermal Water Heating

2009 ◽  
Author(s):  
Eric J. H. Wilson ◽  
John J. Burkhardt
Keyword(s):  
Life Cycle ◽  
Cost Effectiveness ◽  
Thermal Water ◽  
Cost Effective ◽  
Heating System ◽  
The Other ◽  
Cooling Effect ◽  
Solar Thermal ◽  
Water Heating ◽  
Pv System

The cost-effectiveness of a photovoltaic (PV) powered heat pump water heater (HPWH) system is compared to that of a traditional solar thermal water heating system. HPWH evaporators are most often located inside the conditioned building space, resulting in a year-round cooling effect in the building. This effect is beneficial during the cooling season but detrimental during the heating season. The significance of this cooling effect was evaluated as part of the life cycle cost (LCC) analysis of the PV-powered HPWH system. Four different locations were considered: Boulder, CO; Miami, FL; Chicago, IL; and Seattle, WA. For the solar thermal analysis, both electric resistance and gas-fired auxiliary water heating scenarios were considered. Life cycle costs for the PV-HPWH system were calculated for the case of a PV system dedicated to providing electricity for the HPWH, and for the case of a previously planned residential PV system being increased in size to accommodate the HPWH. This latter case uses a lower, incremental cost of increasing the size of the PV system. The most notable results of the analysis are summarized below: • In general, the solar thermal system is more cost effective than the PV-HPWH system, even using the incremental cost of increasing the size of a planned PV system. • In locations where there are incentives that apply to PV but not solar thermal systems, as in much of Colorado, the PV-HPWH system will be more cost-effective than solar thermal. • The cooling effect of the HPWH evaporator is a net benefit in Miami, FL, but a net penalty in the other three locations. • The PV-HPWH system becomes more cost-effective than solar thermal with gas auxiliary in Miami when the price of natural gas is increased from $1 to $1.50 per therm. • Increasing the price of gas in the other locations does not make the PV-HPWH system compete against solar thermal because the cooling effect penalty also increases with the price of natural gas.

scholarly journals Energy and Exergy Analysis of a Plane Reflector Integrated Photovoltaic-Thermal Water Heating System

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Prem Sagar Naik ◽  
Arun Palatel
Keyword(s):  
Solar Radiation ◽  
Thermal Water ◽  
Winter Season ◽  
Performance Testing ◽  
Electrical Energy ◽  
Heating System ◽  
Present System ◽  
Exergetic Efficiency ◽  
Water Heating ◽  
Electrical Output

A photovoltaic-thermal water heating system is a hybrid energy conversion device transforming the incident solar radiation to yield electrical energy and thermal energy. Plane reflectors are found to be a convenient option for enhancing the solar radiation incident on the collector plane. The present work investigates the performance of a photovoltaic-thermal water heater integrated with a plane reflector mounted on the top edge of the collector for the tropical climate of Calicut (11.25°N, 75.78°E). Performance testing of the system has been carried out for the winter season of the location. The variations in thermal and electrical output are studied for various inclination angles of the reflector. The system performance is evaluated on the basis of system energy efficiency and exergetic efficiency. It is observed that there is a significant enhancement in the thermal and electrical output of the system with the integration of the reflector as compared to the system without the reflector. For the present system, the reflector tilt angle in the range of 85–100° has been found to be suitable in terms of enhanced system output and exergetic efficiency for the winter conditions of Calicut.

A sensitivity study of a hybrid photovoltaic/thermal water-heating system with natural circulation

2007 ◽  
Vol 84 (2) ◽  
pp. 222-237 ◽  
Author(s):  
Jie Ji ◽  
Jian-Ping Lu ◽  
Tin-Tai Chow ◽  
Wei He ◽  
Gang Pei
Keyword(s):  
Thermal Water ◽  
Natural Circulation ◽  
Heating System ◽  
Sensitivity Study ◽  
Water Heating

scholarly journals Design, Fabrication and Experimental Study of a Novel Loop-heat-pipe Based Solar Thermal Facade Water Heating System

2015 ◽  
Vol 75 ◽  
pp. 566-571 ◽  
Author(s):  
Peng Xu ◽  
Jingchun Shen ◽  
Xingxing Zhang ◽  
Wei He ◽  
Xudong Zhao
Keyword(s):  
Experimental Study ◽  
Heat Pipe ◽  
Heating System ◽  
Solar Thermal ◽  
Loop Heat Pipe ◽  
Water Heating
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