Landolt-Börnstein - Group VIII Advanced Materials and Technologies

8.1 The Earth's thermal regime

Abstract

This chapter discusses the Earth’s thermal regime. The conditions under which geothermal energy can be exploited strongly depend on both the origin of geothermal heat and the environment in which it is stored. Therefore, the chapter examines the internal structure of the Earth. It discusses the energy budget of the Earth and the contributions of the various external and internal sources and sinks of heat. The thermal regime of the Earth's crust structure, the magnitudes of heat storage and transport, and the associated physical properties specific heat capacity, thermal conductivity, and thermal diffusivity are explained. The heat is stored in the Earth by virtue of the heat capacity of its rocks and fluids. The heat transport in the Earth is governed mainly by three mechanisms: radiation, advection, and transient diffusion or steady-state conduction. The Earth's energy budget is determined by its thermal income and expenditure.

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Title
8.1 The Earth's thermal regime
Book Title
Renewable Energy
In
8 Geothermal energy
Book DOI
10.1007/b83039
Chapter DOI
10.1007/10858992_17
Part of
Landolt-Börnstein - Group VIII Advanced Materials and Technologies
Volume
3C
Editors
  • K. Heinloth Send Email (100)
  • Editor Affiliation
  • 100 Physikalisches Institut, Universität Bonn, Nußallee 12, 53115, Bonn, Germany
  • Authors
  • C. Clauser Send Email (8)
  • Author Affiliation
  • 8 Lehrstuhl für Angewandte Geologie, RWTH Aachen, Aachen, Germany
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