1985-1990 Update Report on the Existing and Planned Utilization of Geothermal Energy for Electricity Generation in New Zealand

1992 ◽  
Vol 14 (2) ◽  
pp. 205-216 ◽  
Author(s):  
I. A. THAIN
Keyword(s):  
New Zealand ◽  
Geothermal Energy ◽  
Electricity Generation

scholarly journals A Project To Estimate The Power Capacity Of Geothermal Power Plants Based On The Enthalpy Of Geothermal Fluid And Plant Design

2021 ◽  
Author(s):  
Obumneme Oken
Keyword(s):  
Power Plant ◽  
Geothermal Energy ◽  
Electricity Generation ◽  
Power Plants ◽  
Hot Water ◽  
Power Capacity ◽  
Geothermal Fluid ◽  
Direct Heating ◽  
Single Flash ◽  
Geothermal Power

Nigeria has some surface phenomena that indicate the presence of viable geothermal energy. None of these locations have been explored extensively to determine the feasibility of sustainable geothermal energy development for electricity generation or direct heating. In this context, the present study aims to provide insight into the energy potential of such development based on the enthalpy estimation of geothermal reservoirs. This particular project was conducted to determine the amount of energy that can be gotten from a geothermal reservoir for electricity generation and direct heating based on the estimated enthalpy of the geothermal fluid. The process route chosen for this project is the single-flash geothermal power plant because of the temperature (180℃) and unique property of the geothermal fluid (a mixture of hot water and steam that exists as a liquid under high pressure). The Ikogosi warm spring in Ekiti State, Nigeria was chosen as the site location for this power plant. To support food security efforts in Africa, this project proposes the cascading of a hot water stream from the flash tank to serve direct heat purposes in agriculture for food preservation, before re-injection to the reservoir. The flowrate of the geothermal fluid to the flash separator was chosen as 3125 tonnes/hr. The power output from a single well using a single flash geothermal plant was evaluated to be 11.3 MW*. This result was obtained by applying basic thermodynamic principles, including material balance, energy balance, and enthalpy calculations. This particular project is a prelude to a robust model that will accurately determine the power capacity of geothermal power plants based on the enthalpy of fluid and different plant designs.

Analyzing the Efficiency of Renewable Energy Sources in Terms of Electricity Generation

2021 ◽  
pp. 155-176
Author(s):  
Talip Arsu
Keyword(s):  
Renewable Energy ◽  
Geothermal Energy ◽  
Energy Supply ◽  
Electricity Generation ◽  
Renewable Energy Sources ◽  
Biomass Energy ◽  
Energy Sources ◽  
Data Envelopment ◽  
Efficiency Determination ◽  
Energy Supply Security

Electricity generation, one of the renewable energy sources (RES), delivers a solution for various problems such as energy efficiency, energy supply security, reducing foreign dependency, and especially, environmental concerns. However, the solutions provided for these problems bring along the question of which RESs are produced more effectively. Therefore, in this research, RESs used for electricity generation in Turkey were analyzed by using generation data to show which one is more effective. Bi-objective multiple-criteria data envelopment analysis (BiO-MCDEA) method, a goal programming-based efficiency determination method, was used for the efficiency analysis conducted for five years between the years of 2014 and 2018. As a result of the analysis, geothermal energy came into prominence as the most effective RES for all of the years included in the solution. Geothermal energy was followed by biomass energy, wind energy, hydroelectric, and solar energy, respectively.

scholarly journals Entanglement of Top-Down and Bottom-Up: Sociotechnical Innovation Pathways of Geothermal Energy in Switzerland

2019 ◽  
Vol 29 (1) ◽  
pp. 99-122 ◽  
Author(s):  
Olivier Ejderyan ◽  
Franziska Ruef ◽  
Michael Stauffacher
Keyword(s):  
Federal Government ◽  
Heat Production ◽  
Geothermal Energy ◽  
Electricity Generation ◽  
Electricity Production ◽  
Top Down ◽  
Bottom Up ◽  
Federal Policies ◽  
Deep Geothermal Energy ◽  
Policy Incentives

By looking at deep geothermal energy in Switzerland, this article illustrates how innovation pathways in federal countries take entangled forms between top-down and bottom-up. The Swiss federal government presents deep geothermal energy as an important technology to decarbonize electricity production. Setbacks in early projects have slowed these efforts. Despite strong policy incentives from the federal government, no electricity is being produced from geothermal projects in Switzerland in 2019. Based on four case studies, we analyze how some cantons and cities have taken different pathways: Rather than implementing federal objectives, they favor heat production instead of electricity generation. The relative success of these initiatives led federal authorities to modify their approach to promoting geothermal energy. This study shows that federal mechanisms and instruments alone are not enough to make energy infrastructures acceptable locally. To learn from bottom-up experiences and adapt federal policies to local reality, better coordination between the federal and subnational levels is needed.

scholarly journals Barriers and Solutions for Increasing the Integration of Solar Photovoltaic in Kenya’s Electricity Mix

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5502
Author(s):  
Dominic Samoita ◽  
Charles Nzila ◽  
Poul Alberg Østergaard ◽  
Arne Remmen
Keyword(s):  
Geothermal Energy ◽  
Trade Balance ◽  
Electricity Generation ◽  
Renewable Energy Sources ◽  
Electricity Production ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Storage Solutions ◽  
Electricity Mix ◽  
National Trade

Currently, Kenya depends mainly on oil, geothermal energy and hydro resources for electricity production, however all three have associated issues. Oil-based electricity generation is environmentally harmful, expensive and a burden to the national trade balance. The rivers for hydropower and their tributaries are found in arid and semi-arid areas with erratic rainfall leading to problems of supply security, and geothermal exploitation has cost and risk issues amongst others. Given these problems and the fact that Kenya has a significant yet underexploited potential for photo voltaic (PV)-based power generation, the limited—although growing—exploitation of solar PV in Kenya is explored in this paper as a means of diversifying and stabilising electricity supply. The potential for integration of PV into the Kenyan electricity generation mix is analysed together with the sociotechnical, economic, political, and institutional and policy barriers, which limit PV integration. We argue that these barriers can be overcome with improved and more robust policy regulations, additional investments in research and development, and improved coordination of the use of different renewable energy sources. Most noticeably, storage solutions and other elements of flexibility need to be incorporated to balance the intermittent character of electricity generation based on solar PV.

Possibilities of electricity generation in the Republic of Croatia by means of geothermal energy

Energy ◽  
2010 ◽  
Vol 35 (8) ◽  
pp. 3429-3440 ◽  
Author(s):  
Z. Guzović ◽  
D. Lončar ◽  
N. Ferdelji
Keyword(s):  
Geothermal Energy ◽  
Electricity Generation ◽  
The Republic

scholarly journals Recent Status of Geothermal Energy Applications in Turkey

2005 ◽  
Vol 23 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Mustafa Balat
Keyword(s):  
Geothermal Energy ◽  
Electricity Generation ◽  
District Heating ◽  
Minor Role ◽  
Geothermal Heat ◽  
Heating Systems ◽  
Energy Applications ◽  
Geothermal Potential ◽  
A Minor ◽  
Installed Capacity

This article considers recently status of geothermal energy in Turkey. Turkey is the 7th richest country in the world in geothermal potential. The overall geothermal potential in Turkey is about 38,000 MW. But only 2% of its potential is used. Geothermal electricity generation has a minor role in Turkey's electricity capacity as low as 0.09% but the projections foresee an improvement to 0.32% by the year of 2020. Most of the geothermal sites for electricity generation are located in Aydin–Germencik (505 K), Denizli–Kizildere (515 K), Aydin–Salavatli (444 K), Canakkale–Tuzla (446 K) and Kutahya–Simav (435 K). Turkey has increased their installed capacity over the past five years from 140 MWt to 820 MWt, most for district heating systems. This supplies heat to 51,600 equivalent residences and engineering design to supply a further 150,000 residences with geothermal heat is complete.

scholarly journals Optimization of a Grid-Connected Microgrid Using Tidal and Wind Energy in Cook Strait

Fluids ◽  
2021 ◽  
Vol 6 (12) ◽  
pp. 426
Author(s):  
Navid Majdi Nasab ◽  
Md Rabiul Islam ◽  
Kashem Muttaqi ◽  
Danny Sutanto
Keyword(s):  
New Zealand ◽  
Electricity Generation ◽  
Wind Farm ◽  
Fossil Fuels ◽  
Offshore Wind ◽  
Tidal Power ◽  
Renewable Sources ◽  
Tidal Turbines ◽  
Cook Strait ◽  
Strong Winds

The Cook Strait in New Zealand is an ideal location for wind and tidal renewable sources of energy due to its strong winds and tidal currents. The integration of both technologies can help to avoid the detrimental effects of fossil fuels and to reduce the cost of electricity. Although tidal renewable sources have not been used for electricity generation in New Zealand, a recent investigation, using the MetOcean model, has identified Terawhiti in Cook Strait as a superior location for generating tidal power. This paper investigates three different configurations of wind, tidal, and wind plus tidal sources to evaluate tidal potential. Several simulations have been conducted to design a DC-linked microgrid for electricity generation in Cook Strait using HOMER Pro, RETScreen, and WRPLOT software. The results show that Terawhiti, in Cook Strait, is suitable for an offshore wind farm to supply electricity to the grid, considering the higher renewable fraction and the lower net present cost in comparison with those using only tidal turbines or using both wind and tidal turbines.

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