Title: Environmental thermodynamic limitations on global human population

Authors: Viorel Badescu, Richard B. Cathcart

Addresses: Candida Oancea Institute, Dept. of Solar Energy, Faculty of Mechanical Engineering, Polytechnic University of Bucharest, Spl. Independentei 313, Bucharest 79590, Romania. ' Geographos, 1608 East Broadway, Suite #107, Glendale, CA 91205-1524, USA

Abstract: This paper examines, from a thermodynamic point of view, how many people the Earth can support. The maximum human population allowed by the natural earth ranges from 300 million millions to 1,700 million millions and will not exceed 1,300 million millions if an ambient temperature of 300 K is accepted. A further increase in population number is obtained for macro-engineered earth when heat pumps driven by solar energy have to be used in order to allow heat to be evacuated form the living space towards that part of the earth|s surface acting as a radiator. Then, the maximum world population ranges between 1,600 and 4,000 million millions for various cases detailed in the paper.

Keywords: macro-engineering; maximum human population; thermal environment; environmental thermodynamics; heat pumps; solar energy; solar power; world population.

DOI: 10.1504/IJGEI.2006.008389

International Journal of Global Energy Issues, 2006 Vol.25 No.1/2, pp.129 - 140

Available online: 15 Dec 2005 *

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