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Future Blog Post
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Geothermal energy and future
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Future of renewable energy
Renewable energy sources are emerging as a viable alternative to traditional energy sources to counter the environmental and economic consequences of fossil fuels. Renewable energy sources like solar and wind power have shown great promise, but they come with their own set of challenges. One of the biggest challenges facing renewable energy is the intermittent of their availability. A small portion of the Sahara Desert is enough to power the world by tapping solar energy with PV collectors. However, the story raises the question of feasibility. Solar energy needs to be stored overnight, and the total battery storage system cannot even store energy that supplies global demand for an hour. This story is common for wind technology. This realization has prompted the search for renewable energy technologies that can serve as a base load and round the clock and geothermal energy has emerged as a potential candidate. Geothermal energy ====== Geothermal energy is one such technology that can overcome the intermittency issue of wind and solar. Geothermal is a base load energy source, meaning it provides a constant supply of energy, is available 24/7, and is not affected by weather conditions. This also omits the necessity of energy storage systems making it a reliable solution to the world’s energy needs. Another important advantage of geothermal is that it could be used as heat or electricity depending on the user needs. In many energy systems, meeting heating demand involves generating electricity and then converting it into heat, which reduces the overall efficiency of the system. But geothermal system is flexible and can be designed to get either heat or electricity based on the end use requirement. Especially colder countries like Canada, where spacing heating constituents more than 80% of total energy in residential buildings, as well as significant portion of heating in other sectors including manufacturing and mining, could benefit from direct heat use from geothermal systems. Geothermal as the name suggests is a combination of two words: ‘geo’ and ‘thermal’, which means the heat from earth. Heat energy from earth’s core is utilized in the form of heat or electricity for end use. From ancient times, geothermal energy is being used for different applications like natural hot water bathing and fishing. However, more advanced technology, such as geothermal power generation and direct heat utilization for different residential and industrial activities, has been used to tap geothermal energy for past 100 years. Limitations of geothermal energy ====== Geothermal energy, despite having several advantages over other renewable energy sources, a long history, and the installation of the first commercial power plant in Italy in 1913, paradoxically has a much lower power and energy generation today. With a capacity of only 16 GWe and 107 GWTH (literature in the literature folder – geothermal direct use), lags significantly behind wind and solar energy, which each have a capacity of approximately 1000 GWe. This disparity of low geothermal harvesting is attributed to the limitations of current hydrothermal technology, which relies on a two-hole extraction-injection system. Figure 4 depicts schematics of such systems in which hot geothermal fluid is recovered to power turbines or heat buildings before being injected back underground. However, the requirement for both geothermal fluid and high temperatures restricts its widespread application. Although the Earth’s deep regions have high temperatures, the presence of fluid is inconsistent. Geothermal systems present environmental concerns through changes to geothermal fluids and underground water systems. The corrosive properties of geothermal fluids also cause faster degradation of turbines, heat exchangers, and other machinery, reducing the effectiveness and lifespan of geothermal systems. Consequently, the limitations of conventional geothermal energy raise concerns about its expandability and feasibility.
Blog Post number 4
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This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
Blog Post number 3
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This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
Blog Post number 2
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This is a sample blog post. Lorem ipsum I can’t remember the rest of lorem ipsum and don’t have an internet connection right now. Testing testing testing this blog post. Blog posts are cool.
portfolio
Portfolio 2
Hexahedral mesh generation in complex geometrical domains using different techniques
publications
Techno-Economic Trade-Off between Battery Storage and Ice Thermal Energy Storage for Application in Renewable Mine Cooling System
Published in Applied Sciences, 2020
This paper presents a technical and economic study of a solar PV coupled with ice thermal energy storage system for remote underground mine cooling applications.
Thermal performance evaluation of integrated solar-geothermal system; a semi-conjugate reduced order numerical model
Published in Applied Energy, 2021
Development of a reduced-order numerical model for heat and mass transfer in a coaxial borehole heat exchanger system.
Renewable heating solutions for buildings; a Techno-Economic Comparative Study of Sewage Heat Recovery and Solar Borehole Thermal Energy Storage System
Published in Energy & Buildings, 2021
Technical, economic and environmental analysis of sewage heat recovery vs. solar borehole thermal energy storage for building heating.
Field-scale experimental and numerical analysis of a downhole coaxial heat exchanger for geothermal energy production
Published in Renewable Energy, 2021
This paper presents experimental and computational analyses of a 500 m deep coaxial borehole heat exchanger system for geothermal power generation.
Reduced order 1+ 3D numerical model for evaluating the performance of solar borehole thermal energy storage systems
Published in Journal of Energy Storage, 2023
A computationally efficient reduced-order model coupling 1D fluid flow and convective heat transfer with 3D conductive heat transfer for solar borehole thermal energy storage systems.
talks
Prospects of Bagasse Cogeneration in Sugar Industries of Nepal
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This presentation was about the Bagasse cogeneration potential of Nepalese sugar industries: the total electric power that can be produced and fed to the national grid, the economic issues and the issues of emissions.Find conference proceeding here
Turbine Modeling for Run-of-theRiver Hydropower
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I presented the results of experimental and computational analysis of cross-flow water turbine designed for low head power generation system from untapped but existing dams. More information about the work
Evaluation of a novel integrated solar-borehole thermal energy storage system for residential high-rise building heating applications
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This talk was presented by my co-cuthor Dr. Leyla Amiri on International Conference on Applied Energy. This study performs the design and performance analysis of a novel solar-borehole thermal energy storage system to supply a complete heating solution to a residential high-rise building located in Ontario, Canada. Access Proceeding
Field-scale experimental and numerical analyses of a downhole coaxial heat exchanger: a closed loop solution for extraction of medium to high temperature geothermal energy
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I this conference, I presented the results of field-scale experimental and numerical analyses of a 500 m deep coaxial borehole heat exchanger system for a geothermal power generation application.It is the second field-test experiment on coaxial borehole heat exchanger system for power generation application after 1991 in Hawaii.
A sustainable Heating Solution for Multifamily Residential Buildings in Cold Climates
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This talk was presented virtually at 9th International Renewable and Sustainable Energy Conference - 2021. In this presentation, a municipal sewage heat recovery system is proposed to supply the thermal demand of the multifamily residential building with 826 apartment units throughout the year. A Solar-PV system that feeds energy to the heat pumps and water pumps of the sewage heat recovery system is proposed to make it 100 % green. Technical and economic aspects of the project are discussed in the analysis. Access Presentation Video
Evaluation of closed-loop geothermal heat exchanger for heating and power generation
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This is my talk on closed-loop geothermsl energy to Cornell University’s geothermal group led by professor Jefferson William Testor. Access Video
teaching
Teaching
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