scholarly journals The Energy Efficiency of Hot Water Production by Gas Water Heaters with a Combustion Chamber Sealed with Respect to the Room

Water ◽  
2014 ◽  
Vol 6 (8) ◽  
pp. 2394-2411 ◽  
Author(s):  
Grzegorz Czerski ◽  
Andrzej Strugała
Keyword(s):  
Energy Efficiency ◽  
Combustion Chamber ◽  
Hot Water ◽  
Water Production ◽  
Water Heaters

Heat Pumps for Energy Saving of Building Hot Water Supply

2011 ◽  
Vol 347-353 ◽  
pp. 587-590
Author(s):  
Qing Hai Luo ◽  
Zheng Zuo
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Water Supply ◽  
Energy Saving ◽  
Heat Pump ◽  
Heat Pumps ◽  
Hot Water ◽  
Low Energy ◽  
Water Heaters ◽  
Hot Water Supply

This paper analyzes the energy consumption of hot water supply in buildings and the insurmountable shortcoming of low energy efficiency of conventional water heaters, and investigates the progress and problems of developing heat pump water heaters. It is pointed out that developing of heat pump water heaters is one of the efficient approaches to improve the energy efficiency of hot water supply.

scholarly journals Automatic testing system to evaluate the energy efficiency of electric storage water heaters

2018 ◽  
Vol 51 (7-8) ◽  
pp. 223-234 ◽  
Author(s):  
Jianfeng Yu ◽  
Jian Fu ◽  
Feng Guo ◽  
Yaocong Xie
Keyword(s):  
Energy Efficiency ◽  
Hot Water ◽  
Automatic Testing ◽  
Sensor Data ◽  
Water Withdrawal ◽  
Testing System ◽  
Water Heaters ◽  
Logical Control ◽  
Efficiency Performance ◽  
Automatic Testing System

Background: The energy efficiency of electric storage water heaters is a concern for enterprises and customers because it is beneficial for energy saving. To decrease the workload of testing personnel and improve the testing efficiency, an automatic testing system for evaluating the energy efficiency performance of electric storage water heaters has been designed. Methods: The complete testing system includes a water supply subsystem, hot water outlet subsystem, hardware subsystem, and software subsystem. An application program was developed using Visual Basic to acquire the sensor data and transmit it in real time to a database server. The energy efficiency evaluating process was controlled by the application software,by combining the data acquisition technology, communication technology, and program logical control technology. Results: The designed system can run automatically and achieve reliable tests, two important parameters including the standing loss per 24 h and the hot water withdrawal rate were obtained. Conclusion: This system can be applied to evaluate the energy efficiency grades of electric storage water heaters.

scholarly journals Energy Efficiency for Social Buildings in Morocco, Comparative (2E) Study: Active VS. Passive Solutions Via TRNsys

Inventions ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 4
Author(s):  
Fatima Zohra Gargab ◽  
Amine Allouhi ◽  
Tarik Kousksou ◽  
Haytham El-Houari ◽  
Abdelmajid Jamil ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
Building Envelope ◽  
Hot Water ◽  
Solar Water Heater ◽  
Water Heater ◽  
Climatic Zones ◽  
Solar Water ◽  
Water Heaters ◽  
Solar Water Heaters

This paper aims to highlight the potential of solar water heater installations in Morocco. The project involves the comparison of active and passive solutions for energy efficiency in buildings. To this end, a numerical simulation model of solar water heater installations is created under TRNsys. Three hot water demand scenarios (Low, Standard, and High) were taken into account for the six climatic zones defined in the Moroccan thermal regulation of constructions. The same software (TRNsys) is used to model a pilot building consisting of 16 flats. Energy efficiency actions have been applied to the building envelope (insulation and glazing) and simulations are made for the six areas. The simulation results comparing energy and financial savings show the influence of subsidized gas prices on solar water heaters’ relevance despite significant energy savings. This work proves that solar water heaters will be a primary obligation for Morocco, taking into account changes in butane gas prices.

scholarly journals Developing a hot-water drill system for the WISSARD project: 2. In situ water production

2014 ◽  
Vol 55 (68) ◽  
pp. 298-302 ◽  
Author(s):  
Daren S. Blythe ◽  
Dennis V. Duling ◽  
Dar E. Gibson
Keyword(s):  
Waste Heat ◽  
Hot Water ◽  
Water Production ◽  
Initial Water ◽  
Diameter Hole ◽  
Water Heaters ◽  
Whillans Ice Stream ◽  
The Antarctic ◽  
Drill System

AbstractSuccessful hot-water drilling in the Antarctic is predicated on utilization of the abundant water supply available in the form of the Antarctic ice sheet. For WISSARD (Whillans Ice Stream Subglacial Access Research Drilling) field operations, a snowmelting system was developed that could adequately provide water for a 1000 kW hot-water drill. The system employs ∼100 kW of waste heat from a 225 kW generator to melt snow for initial water (known as seed water) to prime the drill’s high-pressure pumps and water heaters; once the water heaters can be engaged in snowmelting, enough water can be supplied directly to the WISSARD drill to successfully melt a 40 cm diameter hole through 800 m of ice.

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