The Experts below are selected from a list of 121065 Experts worldwide ranked by ideXlab platform
A C S Hayden - One of the best experts on this subject based on the ideXlab platform.
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direct thermal to electrical energy conversion using very low bandgap tpv cells in a gas fired furnace system
Energy Conversion and Management, 2014Co-Authors: K Qiu, A C S HaydenAbstract:Abstract In this paper, electricity generation using very low bandgap InGaAsSb thermophotovoltaic (TPV) cells whose bandgap is 0.53 eV was investigated in a Gas-Fired furnace system where thermal radiation was emitted from a metal alloy emitter. The electric output of the InGaAsSb TPV cells was characterized under various operating conditions. The cell short circuit density was measured to be 3.01 A/cm2 at an emitter temperature of 1197 °C. At this emitter temperature, an electric power density of 0.65 W/cm2 was produced by the TPV cells. Experimental results show that direct thermal to electrical energy conversion was achieved in a Gas-Fired Heating furnace system. Such a system could be employed to form a micro-combined heat and power (micro-CHP) process where exhaust heat is utilized for home Heating needs. The TPV integrated energy system provides an effective means for primary energy savings.
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thermophotovoltaic generation of electricity in a gas fired heater influence of radiant burner configurations and combustion processes
Energy Conversion and Management, 2003Co-Authors: K Qiu, A C S HaydenAbstract:Abstract With recent advances in low bandgap thermophotovoltaic (TPV) devices, further research into the radiant burner and its effect on the performance of TPV systems is particularly needed. The present work investigates various gas fired radiant burner/emitters and the influence of the combustion processes on radiant power and radiant efficiency. The performance tests with the burner/emitters have been conducted in a TPV self powered heater (mini cogenerator). It is shown that the radiant burner performance is affected markedly by the combustion parameters. Care must be taken to diminish the risk of flashback for the surface flame type burner. The maximum radiant power density and radiant efficiency of the burner/emitters have been determined. This is of great interest to TPV generation in gas fired Heating appliances. Furthermore, the maximum electric power generated by the GaSb TPV converter is measured under a range of operating conditions for the different burner/emitter configurations. An electric power density of 0.332 W/cm 2 has been achieved. Finally, the cogenerating aspects of the TPV systems are discussed.
A Szyszka - One of the best experts on this subject based on the ideXlab platform.
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operation of 20 kwth gas fired Heating boilers with hydrogen natural gas and hydrogen natural gas mixtures first test results from phase 1 march 1993 of the neunburg vorm wald solar hydrogen project
International Journal of Hydrogen Energy, 1994Co-Authors: K Hoelzner, A SzyszkaAbstract:Abstract Under Phase 1 of the solar hydrogen project, two Gas-Fired Heating boiler units with modified burners were installed. They are capable of burning hydrogen, natural gas or mixtures of both gases, one using air and the other oxygen for combustion of the fuel. The possibility of adding hydrogen to natural gas allows an investigation of the transition from the previous supply of mainly fossil-origin fuels for conventional Gas-Fired Heating boilers to the possible supply of hydrogen as a fuel. Descriptions in this report are of the first operating experience and the test results are devoted primarily to the use of air as the oxidizer in combustion.
K Qiu - One of the best experts on this subject based on the ideXlab platform.
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direct thermal to electrical energy conversion using very low bandgap tpv cells in a gas fired furnace system
Energy Conversion and Management, 2014Co-Authors: K Qiu, A C S HaydenAbstract:Abstract In this paper, electricity generation using very low bandgap InGaAsSb thermophotovoltaic (TPV) cells whose bandgap is 0.53 eV was investigated in a Gas-Fired furnace system where thermal radiation was emitted from a metal alloy emitter. The electric output of the InGaAsSb TPV cells was characterized under various operating conditions. The cell short circuit density was measured to be 3.01 A/cm2 at an emitter temperature of 1197 °C. At this emitter temperature, an electric power density of 0.65 W/cm2 was produced by the TPV cells. Experimental results show that direct thermal to electrical energy conversion was achieved in a Gas-Fired Heating furnace system. Such a system could be employed to form a micro-combined heat and power (micro-CHP) process where exhaust heat is utilized for home Heating needs. The TPV integrated energy system provides an effective means for primary energy savings.
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thermophotovoltaic generation of electricity in a gas fired heater influence of radiant burner configurations and combustion processes
Energy Conversion and Management, 2003Co-Authors: K Qiu, A C S HaydenAbstract:Abstract With recent advances in low bandgap thermophotovoltaic (TPV) devices, further research into the radiant burner and its effect on the performance of TPV systems is particularly needed. The present work investigates various gas fired radiant burner/emitters and the influence of the combustion processes on radiant power and radiant efficiency. The performance tests with the burner/emitters have been conducted in a TPV self powered heater (mini cogenerator). It is shown that the radiant burner performance is affected markedly by the combustion parameters. Care must be taken to diminish the risk of flashback for the surface flame type burner. The maximum radiant power density and radiant efficiency of the burner/emitters have been determined. This is of great interest to TPV generation in gas fired Heating appliances. Furthermore, the maximum electric power generated by the GaSb TPV converter is measured under a range of operating conditions for the different burner/emitter configurations. An electric power density of 0.332 W/cm 2 has been achieved. Finally, the cogenerating aspects of the TPV systems are discussed.
K Hoelzner - One of the best experts on this subject based on the ideXlab platform.
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operation of 20 kwth gas fired Heating boilers with hydrogen natural gas and hydrogen natural gas mixtures first test results from phase 1 march 1993 of the neunburg vorm wald solar hydrogen project
International Journal of Hydrogen Energy, 1994Co-Authors: K Hoelzner, A SzyszkaAbstract:Abstract Under Phase 1 of the solar hydrogen project, two Gas-Fired Heating boiler units with modified burners were installed. They are capable of burning hydrogen, natural gas or mixtures of both gases, one using air and the other oxygen for combustion of the fuel. The possibility of adding hydrogen to natural gas allows an investigation of the transition from the previous supply of mainly fossil-origin fuels for conventional Gas-Fired Heating boilers to the possible supply of hydrogen as a fuel. Descriptions in this report are of the first operating experience and the test results are devoted primarily to the use of air as the oxidizer in combustion.
Omer Comakli - One of the best experts on this subject based on the ideXlab platform.
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energy analysis of a solar ground source heat pump system with vertical closed loop for Heating applications
Energy, 2011Co-Authors: Kadir Bakirci, Omer Ozyurt, Kemal Comakli, Omer ComakliAbstract:A heat pump system is the ideal way to extend the heat supply of existing oil or gas fired Heating system. Consumption costs are lowered through the use of free energy from the environment, and the dependence on fossils fuels simultaneously reduces. In order to investigate the performance of the solar-ground source heat pump system in the province of Erzurum having cold climate, an experimental set-up was constructed. The experimental apparatus consisted of solar collectors, a ground heat exchanger (GHE), a liquid-to-liquid vapor compression heat pump, water circulating pumps and other measurement equipments. In this study, the performance of the system was experimentally investigated. The experimental results were obtained from October to May of 2008–2009. The experimentally obtained results are used to calculate the heat pump coefficient of performance (COP) and the system performance (COPS). The coefficient of performance of the heat pump and system were found to be in the range of 3.0–3.4 and 2.7–3.0, respectively. This study also shows that this system could be used for residential Heating in the province of Erzurum being a cold climate region of Turkey.