Feasibility of using more geothermal energy to generate electricity

Kaufui Wong, Nathanael Tan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Human population is ever-increasing and thus, demand for energy is escalating. Consequently, seeking clean methods of producing electricity is a most crucial endeavor at this time. The shrinking reserves of oil have added urgency to the matter. One other recognized source of renewable energy besides wind, water and solar (WWS) is geothermal energy, which has been proven to be useful in baseload power generation, a significant advantage over WWS. As compared to fossil fuels, geothermal energy is not subjected to the supply and cost fluctuations of which fuels are at risk. To date, there have been a number of innovative procedures explored to use geothermal energy to produce electricity. A relatively innovative yet not uncommon method has been to use hot solid rocks to heat water and pump the superheated water to use in power plants. These rocks are generally underground and at higher temperatures due to their proximity to volcanoes or natural geothermal vents. The water goes deeper down into the earth's crust to become superheated by the rocks, and then is pumped out to power turbines, and subsequently returned into the ground to repeat the process. In Krafla, Iceland, during their Icelandic Deep Drilling Project (IDDP) in 2009, a borehole was accidentally dug into the magma at 2100 meters. The temperature of this magma was about 900- 1000°C. A steel casing with perforations on the flat side was cemented into the well bottom. This design was to slow the heat flow, and superheated steam was made for the following two years till July 2012. The steam reached temperatures of 450°C and was at high pressures. Krafla was the world's first magmaenhanced geothermal system to generate electricity. This paper will explore the feasibility of using geothermal power plant methods as a sustainable source of clean energy. Geothermal energy has tremendous potential if the right methods can be found to tap that potential, as well as if the cost may be brought down by innovation and demand. In addition, an innovative method which already exists in some form, is proposed in the current review, to harness more geothermal energy for use.

Original languageEnglish (US)
Title of host publicationASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume6A
DOIs
StatePublished - 2014
EventASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014 - Montreal, Canada
Duration: Nov 14 2014Nov 20 2014

Other

OtherASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014
CountryCanada
CityMontreal
Period11/14/1411/20/14

ASJC Scopus subject areas

  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Feasibility of using more geothermal energy to generate electricity'. Together they form a unique fingerprint.

  • Cite this

    Wong, K., & Tan, N. (2014). Feasibility of using more geothermal energy to generate electricity. In ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) (Vol. 6A). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2014-36751