scholarly journals Performance of Hot water Power Generation System. Optimization and Turbine Efficiency of Hot Water Turbine System.

1995 ◽  
Vol 61 (587) ◽  
pp. 2690-2697
Author(s):  
Iwao Kawaguchi ◽  
Takehiro Ito ◽  
Tadashi Matsumoto ◽  
Kohichi Shima
Keyword(s):  
Power Generation ◽  
System Optimization ◽  
Hot Water ◽  
Generation System ◽  
Water Power ◽  
Turbine Efficiency ◽  
Water Turbine ◽  
Power Generation System

scholarly journals DEVELOPMENT OF WAVE POWER GENERATION SYSTEM SUITABLE FOR INNER BAY

2020 ◽  
pp. 39
Author(s):  
Rioko Hirota ◽  
Takaaki Shigematsu ◽  
Kenji Katoh ◽  
Tatsuro Wakimoto ◽  
Shinya Yoshioka
Keyword(s):  
Power Generation ◽  
Particle Velocity ◽  
High Energy ◽  
Wave Power ◽  
Generation System ◽  
Water Particle ◽  
Water Turbine ◽  
Power Generation System ◽  
The Relationship ◽  
Wave Power Generation

With the increasing demand for renewable energy in the world, research contributing to the improvement of the technology level of wave power generation is essential. The authors have been developed a wave power generation system using port facilities in inner bays with high energy-consuming cities. In this study, the relationship between the rotational characteristics of a Savonius water turbine and the water particle velocity was quantitatively evaluated under the calm conditions of the inner bay, such as wave motion, flow, and coexistence of wave and current. According to the experimental results, it is found that the relationship between the rotational circumferential speed and the water particle velocity of the water turbine installed in a wave field tends to be different from that in a flow field and is evaluated by different equations. In addition, the relationship between circumferential velocity and the water particle velocity has also been formulated when installed in a wave-current coexistence field.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/KX0XBFuao48

System Integration for PEM Fuel Cell With Water and Heat Recovered

2003 ◽  
Author(s):  
Y. Y. Yan ◽  
G. S. Chen ◽  
S. C. Chiang ◽  
H. S. Chu ◽  
F. S. Tsu ◽  
...  
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
System Integration ◽  
Waste Heat ◽  
Pem Fuel Cell ◽  
Proton Exchange ◽  
Hot Water ◽  
Water Recovery ◽  
Generation System ◽  
Power Generation System

A 1 kW proton exchange membrane (PEM) fuel cell power system with heat and water recovery was successfully integrated. This power generation system is designed for the stationary application. The waste heat can be recovered into hot water, which store in a tank with temperature higher than 60°C. This hot water may be suitable for bath and kitchen use in a small family. The adjustment for the power generation system is now on going and promoting. Now 38% in the electrical efficiency (AC110V output) for the system is achieved. With waste heat recovery involved, the system will potentially have overall energy efficiency more than 70%. In order to optimize the system, some technologies should be studied and pre-tested before integration work, which mainly included water management for the fuel cell stack, water and thermal conditions on the performance of fuel cell, air and water pumping power needed for the fitting of optimum system performance.

Performance Evaluation of Photovoltaic Power-Generation System Equipped With a Cooling Device Utilizing Siphonage

2005 ◽  
Vol 128 (2) ◽  
pp. 146-151 ◽  
Author(s):  
Kaoru Furushima ◽  
Yutaka Nawata
Keyword(s):  
Power Generation ◽  
Cooling Water ◽  
Ground Level ◽  
Hot Water ◽  
Generation System ◽  
Cooling Device ◽  
Pv System ◽  
Pv Modules ◽  
Power Generation System ◽  
Hot Water Supply System

In order to construct an efficient photovoltaic (PV) power-generation system, we have developed a new system equipped with a cooling device utilizing siphonage. The major components of the system are an array of PV modules and cooling panels attached to the backside of the PV modules. The PV modules are cooled with cooling water flowing through a narrow gap in each cooling panel, and hot water discharged from the cooling panel can be reused. In order to save energy for introducing cooling water into the panel, siphonage from an upper level of a building to the ground level is utilized. From long-term monitoring tests in summer for the PV system, we confirmed that the cooling of the PV modules increases the electric power and that the reuse of hot water from the cooling panel contributes very much for saving energy consumed in a hot-water-supply system.

Performance Evaluation of Photovoltaic Power-Generation System Equipped With a Cooling Device Utilizing Siphonage

Solar Energy ◽  
2004 ◽  
Author(s):  
Kaoru Furushima ◽  
Yutaka Nawata
Keyword(s):  
Power Generation ◽  
Cooling Water ◽  
Hot Water ◽  
Test Facility ◽  
Generation System ◽  
Cooling Device ◽  
Pv Module ◽  
Pv Modules ◽  
Power Generation System ◽  
Pv Power Generation

Recently, the photovoltaic (PV) power generation system has attracted attention as one of clean energies. Especially, residential roofing PV system connected with power grids has been popularized as a result of increasing concerns over global warming and continuing decline in PV manufacturing costs. The power generated by the PV module increases with irradiance, but it decreases as PV module temperature becomes high. The PV temperature depends on ambient temperature, and becomes more than 60°C in summer. Therefore, the power generated does not necessarily increase even if the irradiance increases in summer. However, if the PV modules were cooled under such a high PV temperature condition, more electrical power would be obtained from PV modules. In this study, a PV power generating system equipped with a cooling device has been developed. The major components of the system are an array of PV modules and cooling panels attached to the backside of the PV modules. The respective PV module is cooled with cooling water flowing through a narrow gap in each cooling panel. Hot water discharged from the cooling panel is delivered to a storage tank and can be reused in anywhere. In order to save energy for introducing cooling water into the panel, a siphonage from an upper level of a building to the ground level is utilized. A siphon tube is connected to a discharge port of the cooling panel, thus the pressure at the discharge port becomes negative. Cooling water enters into the bottom end of the cooling panel at atmospheric pressure and goes up to the top, discharge side. By adopting this cooling water system, we could spread the cooling water evenly over the entire backside of the PV module and thus realized an effective cooling device. In addition, we could make the cooling device light and smaller because no auxiliary pumping system is needed for introducing cooling water. To provide field performance data for the present PV power generation system equipped with the special cooling device mentioned above, long-term monitoring tests in a natural environment were conducted in summer for a test facility constructed at the Yatsushiro National College of Technology (YNCT), Japan. As a result, it was confirmed that the cooling of the PV modules increases the electric power and that the reuse of hot water from the cooling panel contributes very much for saving energy consumed for heating water.

scholarly journals Feasibility of Residential Combined Cooling, Heating, and Power Generation System in Canada

2021 ◽  
Author(s):  
Navid Ekrami
Keyword(s):  
Power Generation ◽  
Waste Heat ◽  
Integrated System ◽  
Hot Water ◽  
Coefficient Of Performance ◽  
Generation System ◽  
Thermally Driven ◽  
Cogeneration System ◽  
Power Generation System ◽  
Charging And Discharging Processes

In order to investigate the feasibility of a combined heating, cooling, and power generation system in the residential sector, an integrated system was designed and installed at the Archetype Sustainable House (ASH) of the Toronto and Region Conservation Authority (TRCA). A Stirling engine based cogeneration unit was used to produce the thermal energy for a thermally driven chiller. The engine supplies hot water up to 95°C. The overall efficiency of up to 90% is determined for the cogeneration system. A thermo-chemical accumulator provided by the ClimateWell AB, was installed and connected to the cogeneration unit. The experimental coefficient of performance (COP) of this chiller during the test period was less than 0.4. Since the ClimateWell chiller rejects heat during both charging and discharging processes, a heat recovery system using three cascade tanks and an outdoor fan coil was designed and installed to utilize the waste heat, for domestic hot water production. A complete TRNSYS model of the tri-generation system was used to verify the experimental results.

Design of a Clamp for a Thermoelectric Generator Using Bimetallic Thermal Properties

2016 ◽  
Author(s):  
Robert Dell ◽  
C. S. Wei ◽  
Nicholas Mitchell ◽  
Runar Unnthorsson
Keyword(s):  
Power Generation ◽  
Thermal Expansion ◽  
Thermoelectric Power ◽  
Coefficient Of Thermal Expansion ◽  
Hot Water ◽  
Leaf Spring ◽  
Generation System ◽  
Thermoelectric Power Generation ◽  
Design Concepts ◽  
Power Generation System

A design team at the Cooper Union for the advancement of Science and Art has developed and patented a robust thermoelectric-based point of use power generation system with no moving parts that is designed to be clamped onto the outer wall of a steam or hot water pipe [1]. Furthermore, in 2013 The Cooper Union for the Advancement of Science received patents for The Bimetallic Leaf Spring and Clamping Device which was designed so that it can compensate for the expected positive expansion and contraction of the thermoelectric power generation system. This paper presents different design concepts evaluated during the development of the clamp and theoretical models for determining the coefficient of thermal expansion of the design concepts. Furthermore, the paper presents experimental results from testing different variations of the selected design concept. Finally, a theoretical thermal expansion model with experimentally obtained parameters is presented. The final clamp design compensates for the expansion and contraction of the thermoelectric power generation system.

Analysis of a 3 kW PEM Fuel Cell Stack Developed by ITRI

2004 ◽  
Author(s):  
M. H. Tsai ◽  
Y. Y. Yan ◽  
H. S. Chu ◽  
R. J. Shyu ◽  
F. Tsau
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Operating Temperature ◽  
Hot Water ◽  
Water Tank ◽  
Water Recovery ◽  
Generation System ◽  
Generation Efficiency ◽  
Fuel Cell Stack ◽  
Power Generation System

A 3kW PEMFC power generation system is developed by Energy and Resources Laboratories in 2002. This system integrates hydrogen storage, fuel reformer, power conversion, hot water tank as well as a 3kW PEMFC stack. The power generation efficiency at 30% and total energy efficiency with hot water recovery at 67% are designed. The stack is key component of this system, and its performance is tested and analyzed before it is integrated into the system. This paper presents its performance in I-V polarization curves with controlling parameters such as fuel cell operating temperature, air humidity, hydrogen humidity and stoichimetric ratio of air. Detailed discussions are given for the effect of each parameter on stack’s performance.

scholarly journals Feasibility of Residential Combined Cooling, Heating, and Power Generation System in Canada

2021 ◽  
Author(s):  
Navid Ekrami
Keyword(s):  
Power Generation ◽  
Waste Heat ◽  
Integrated System ◽  
Hot Water ◽  
Coefficient Of Performance ◽  
Generation System ◽  
Thermally Driven ◽  
Cogeneration System ◽  
Power Generation System ◽  
Charging And Discharging Processes

In order to investigate the feasibility of a combined heating, cooling, and power generation system in the residential sector, an integrated system was designed and installed at the Archetype Sustainable House (ASH) of the Toronto and Region Conservation Authority (TRCA). A Stirling engine based cogeneration unit was used to produce the thermal energy for a thermally driven chiller. The engine supplies hot water up to 95°C. The overall efficiency of up to 90% is determined for the cogeneration system. A thermo-chemical accumulator provided by the ClimateWell AB, was installed and connected to the cogeneration unit. The experimental coefficient of performance (COP) of this chiller during the test period was less than 0.4. Since the ClimateWell chiller rejects heat during both charging and discharging processes, a heat recovery system using three cascade tanks and an outdoor fan coil was designed and installed to utilize the waste heat, for domestic hot water production. A complete TRNSYS model of the tri-generation system was used to verify the experimental results.

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