Research on Heat Exchange Characteristics Between Rock and High-Pressure Fluid Through the Cranny Among Dry Hot Rocks

2010 ◽  
Author(s):  
Lun Li ◽  
Jishun Li ◽  
Shengqi Zhang ◽  
Wei Ma ◽  
Yujun Xue
Keyword(s):  
Power Generation ◽  
High Pressure ◽  
Heat Exchange ◽  
Fossil Fuels ◽  
Fluid Velocity ◽  
Geological Structure ◽  
Energy Sources ◽  
Fluid Temperature ◽  
Geothermal Resources ◽  
Geothermal Power

Owing to energy crisis and global warming, people have to seek for new energy sources to substitute fossil fuels. Human being would maintain persistent development by means of new replaceable energy sources. As a kind of replaceable energy source, geothermal power is attracting people more and more attention. The technology of geothermal power generation has been gradually recognized and applied around the world. Heat exchange is the basic principle of geothermal power generation. A lot of heats stored in dry hot rocks under the ground can be carried out by high-pressure medium. The heat energy drives the steam turbine generator to work. Therefore, the heat exchange between rock and high-pressure fluid through the dry hot rock crannies is a key problem which needs to be solved. Based on the geological structure of rocks, the hypothetical cranny among dry hot rocks is put forward in this paper. The model of a single cranny is established too. The heat exchange between rock and high-pressure fluid through the dry hot rock crannies is analyzed based on the theory of heat transfer and hydrodynamics. The relationship among high-pressure fluid temperature, fluid velocity, dry hot rock crannies length and dry hot rock temperature field is obtained using the single cranny model. It may be useful for the development and application of geothermal resources.

Analysis of HDR Power Generation Technology

2012 ◽  
Vol 616-618 ◽  
pp. 1128-1132
Author(s):  
Yong Cun Guo ◽  
Gang Cheng ◽  
Kun Hu ◽  
Peng Yu Wang
Keyword(s):  
Power Generation ◽  
Fossil Fuels ◽  
Clean Energy ◽  
Geothermal Resources ◽  
Basic Principles ◽  
New Energy ◽  
Power Generation Technology ◽  
Basic Characteristics ◽  
Geographical Characteristics ◽  
Generation Technology

As human overexploitation of non-renewable fossil fuels such as mining resources, the global environment has been severely polluted and damaged, which also poses a threat to human's health. So it is full of demands for renewable and clean energy sources. At present R & D of new energy is also increasing emphasised around the world. HDR as a renewable clean geothermal resources, with large reserves, widely distributed, heat, environmentally friendly development, through the heat exchange technology for power generation, which has a strong potential value.To actively develop new energy and promote the application of HDR power generation technology,we start from the basic characteristics of the HDR, and explore the basic principles of HDR power generation, the key technologies and the development of economic conditions. Meanwhile combined with the geographical characteristics of the environment in China, from the perspective of integration of subject resources,finally we constructively put forward a three-stage strategy for HDR power generation development plan.

scholarly journals Quasi Z-Source Inverter for Pv Power Generation Systems

2019 ◽  
Vol 9 (2) ◽  
pp. 1191-1199
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Modern World ◽  
Power Demand ◽  
Point Tracking ◽  
Power Point ◽  
Pv Power Generation

For the enormously increased power demand in the modern world, the existing fossil fuel sources seem to be inadequate to meet the demands. Hence, it is necessary to switch over to use Renewable Energy Sources (RES). Besides the demand concerns, the power generation from fossil fuels causes environmental pollution prominently. As a result, the utilization of RES has been encouraged. When RES is interconnected with the grid, this system becomes an excellent solution to fulfill the power demand of the present scenario. The energy generated from renewable energy sources varies according to seasonal variations. The power generated from RES can be delivered to the load by interconnecting it with the grid. When a small size RES system is connected with the distribution network, it can deliver energy to the isolated zones where the energy cannot be drawn from the conventional network. In this work, the Artificial Neural Network based Maximum Power Point Tracking scheme has been introduced with Photovoltaic (PV) power generation. Also, a bi-directional charger is introduced to overcome the battery issues. The model is evaluated in the MATLAB/SIMULINK package. The performance of the system is analyzed by applying different voltage levels to qZSI. The voltage gain, effectiveness of the scheme, MPPT and the regulation of the voltages are observed

scholarly journals Geothermal Energy Use and Its Related Technology Development in Japan

2021 ◽  
pp. 1-17
Author(s):  
Kasumi Yasukawa
Keyword(s):  
Power Generation ◽  
Heat Pump ◽  
Research Work ◽  
Hydrothermal Systems ◽  
Ground Source Heat Pump ◽  
Geothermal Resources ◽  
Research Activities ◽  
Ground Source ◽  
Geothermal Power

Abstract Japan has national targets to intensify the geothermal power generation. The government gives several fiscal incentives for geothermal development and R&D through the Ministry of Economy, Trade and Industry. Beside short-termed target by 2030, Japan has a long-term target by 2050. Therefore the R&D also has a short-term target to develop the conventional hydrothermal systems effectively with improved technologies and a long-term target to develop supercritical geothermal resources at a depth of volcanic region. The latter covers from basic scientific investigation to highly technological innovation. In contrast ground source heat pump has been promoted by the private sectors supported mainly by the Ministry of Environment. A topical research work on the ground source heat pump in Japan is suitability mapping for both closed-loop and open-loop systems based on studies on groundwater flows. The detailed situation and research activities for both geothermal power generation and ground source heat pump will be discussed in this paper.

scholarly journals Renewable energy Sector in Gujarat, India

2021 ◽  
Vol 23 (06) ◽  
pp. 1128-1140
Author(s):  
Zahira Tabassum ◽  
◽  
Dr.Chandrashekhar Shastry ◽  
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Power Systems ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Energy Generation ◽  
Energy Sources ◽  
Energy Integration ◽  
Energy Share ◽  
Renewable Energy Generation

Excessive use of traditional energy sources such as fossil fuels has resulted in significant environmental deterioration. India is one of the world’s fastest-growing energy consumers, and it is making continual efforts to increase renewable energy generation. The use of renewable energy sources to generate electricity is expanding every day. Renewable energy integration with existing power systems is a difficult endeavor that necessitates strategy and development. Climate-friendly energy systems will result from the use of renewable energy sources in power generation, as they lower CO2 emissions caused by fossil fuels used in conventional power generation. This research looks at a renewable energy scenario using Gujarat as a case study, which is a leader in renewable energy generation. The policies taken by the Gujarat government to increase renewable energy’s participation in the energy mix, as well as the challenges and potential solutions for boosting the deployment of renewable energy sources across Gujarat, are discussed. This study can be used as a guide for policymakers and researchers in other states and around the world who want to boost renewable energy share.

scholarly journals Assessment of solar energy potential and development in Afghanistan

2021 ◽  
Vol 239 ◽  
pp. 00012
Author(s):  
Ahmad Tamim Mehrad
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Supply And Demand ◽  
Energy Sources ◽  
Energy Potential ◽  
Energy Needs ◽  
Energy Shortage

Energy generation in Afghanistan is limited and heavily dependent on fossil fuels and imported electricity. Due to rapid population growth and progress in the industry, services, and agriculture sectors, the existing energy sources are not fulfilling the current energy needs of the country. Meanwhile, there is a big gap between power supply and demand, which led to an energy shortage in Afghanistan. Consequently, there is a need to develop power generation and assure energy sustainability by concentrating on renewable energy sources. This paper aims to analyze the theoretical, practical, and economic potential of solar energy in Afghanistan with the main focus on PV power technology. Power generation from solar sources is theoretically, practically, and economically suitable for Afghanistan and can be a perfect solution for the energy shortage in the country. The Afghan government should consider developing solar energy as a priority for energy security, socio-economic development, and improving the quality of life in Afghanistan.

scholarly journals PLTS Hybrid Modeling with Vertical Wind Power

2021 ◽  
Vol 21 (2) ◽  
pp. 117-122
Author(s):  
I Ketut Parti ◽  
◽  
I Made Sumertayasa ◽  
Ni Wayan Rasmini ◽  
◽  
...  
Keyword(s):  
Power Generation ◽  
Wind Power ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Vertical Wind ◽  
Energy Crisis ◽  
Energy Sources ◽  
Generation System ◽  
The People ◽  
Power Generation System

he current energy crisis has once again taught us, the people of Indonesia, that serious and systematic efforts to develop and implement renewable energy sources to reduce dependence on fuel must be carried out immediately. The use of renewable and environmentally friendly energy sources, especially those that can reduce the various adverse effects caused by the use of fossil fuels. The urge to leave petroleum as a source of national energy supply is currently being rolled out by various parties, including themselves. These steps are needed to get Indonesia out of the sustainable energy crisis. To optimize the need to combine two generators, namely PLTS with PLTB. The purpose of this study was to determine the combination of a power generation system produced by a vertical wind power plant with solar power with a hybrid system which is expected to optimize the power generation system between the two plants.

Power Generation for India with Higher Efficiency

2018 ◽  
Vol 6 (7) ◽  
pp. 267
Author(s):  
Umeshkannan P ◽  
Muthurajan KG
Keyword(s):  
Power Generation ◽  
Objective Function ◽  
Fossil Fuels ◽  
Programming Model ◽  
Developed Countries ◽  
Power Requirement ◽  
Average Efficiency ◽  
Potential Demand ◽  
The Developed Countries ◽  
Developed Nations

The developed countries are consuming more amount of energy in all forms including electricity continuously with advanced technologies.  Developing  nation’s  energy usage trend rises quickly but very less in comparison with their population and  their  method of generating power is not  seems  to  be  as  advanced  as  developed  nations. The   objective   function   of   this   linear   programming model is to maximize the average efficiency of power generation inIndia for 2020 by giving preference to energy efficient technologies. This model is subjected to various constraints like potential, demand, running cost and Hydrogen / Carbon ratio, isolated load, emission and already installed capacities. Tora package is used to solve this linear program. Coal,  Gas,  Hydro  and  Nuclear  sources can are  supply around 87 %  of  power  requirement .  It’s concluded that we can produce power  at  overall  efficiency  of  37%  while  meeting  a  huge demand  of  13,00,000  GWh  of  electricity.  The objective function shows the scenario of highaverage efficiency with presence of 9% renewables. Maximum value   is   restricted   by   low   renewable   source’s efficiencies, emission constraints on fossil fuels and cost restriction on some of efficient technologies. This    model    shows    that    maximum    18%    of    total requirement   can   be   met   by   renewable itself which reduces average efficiency to 35.8%.   Improving technologies  of  renewable  sources  and  necessary  capacity addition  to  them in  regular  interval  will  enhance  their  role and existence against fossil fuels in future. The work involves conceptualizing, modeling, gathering information for data’s to be used in model for problem solving and presenting different scenarios for same objective.

scholarly journals Recent Advancements in Technical Design and Thermal Performance Enhancement of Solar Greenhouse Dryers

2021 ◽  
Vol 13 (13) ◽  
pp. 7025
Author(s):  
Shiva Gorjian ◽  
Behnam Hosseingholilou ◽  
Laxmikant D. Jathar ◽  
Haniyeh Samadi ◽  
Samiran Samanta ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Fossil Fuels ◽  
Performance Enhancement ◽  
Renewable Energy Sources ◽  
Ghg Emissions ◽  
Heat Pumps ◽  
Energy Sources ◽  
Key Factor ◽  
Hybrid Configuration ◽  
Vegetables And Fruits

The food industry is responsible for supplying the food demand of the ever-increasing global population. The food chain is one of the major contributors to greenhouse gas (GHG) emissions, and global food waste accounts for one-third of produced food. A solution to this problem is preserving crops, vegetables, and fruits with the help of an ancient method of sun drying. For drying agricultural and marine products, several types of dryers are also being developed. However, they require a large amount of energy supplied conventionally from pollutant energy sources. The environmental concerns and depletion risks of fossil fuels persuade researchers and developers to seek alternative solutions. To perform drying applications, sustainable solar power may be effective because it is highly accessible in most regions of the world. Greenhouse dryers (GHDs) are simple facilities that can provide large capacities for drying agricultural products. This study reviews the integration of GHDs with different solar technologies, including photovoltaic (PV), photovoltaic-thermal (PVT), and solar thermal collectors. Additionally, the integration of solar-assisted greenhouse dryers (SGHDs) with heat pumps and thermal energy storage (TES) units, as well as their hybrid configuration considering integration with other renewable energy sources, is investigated to improve their thermal performance. In this regard, this review presents and discusses the most recent advances in this field. Additionally, the economic analysis of SGHDs is presented as a key factor to make these sustainable facilities commercially available.

scholarly journals Catalytic Oxidation of Methane

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 944
Author(s):  
Anil C. Banerjee
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
Catalytic Oxidation ◽  
Energy Sources ◽  
Oxidation Of Methane

Methane (the major component of natural gas) is one of the main energy sources for gas-powered turbines for power generation, and transport vehicles [...]

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