Last ned (Gratis)

Abstrakt

Global warming and climate change is a reality faces the world today and as a result increases
the use of sustainable practices for both energy and water minimising CO2 emissions.
Geothermal heat pumps (GHPs) are an attractive proposition for renewable energy worldwide
as it uses energy naturally stored in the earth. The Earth is a very resourceful form of energy,
using the natural solar energy collection and heat storage capabilities as an infinite heat
source/heat sink at the base of permeable pavements can provide an excellent temperature
gradient for which the GHP’s harnesses. Two experimental rigs were setup up at The
University of Edinburgh for a combined permeable pavement and GHP system. At the base of
a pavement structure (approximately 1 meter) below the ground’s surface, temperatures are
constant of 10ºC in the U.K all year round. The GHP performance efficiency was analysed by
the coefficient of performance (COP) in a heating cycle and the energy efficiency ratio (EER)
in a cooling cycle. The Mean COP and EER for both systems averaged between 2-4.5 and 3-5
respectively. The combined GHP and pavement structure operated at an optimum efficiency
for both heating and cooling cycles and has shown to be unaffected by higher summer or
lower winter temperatures. This hybrid system is an attractive renewable energy technology
and has additional environmental benefits with regards to urban runoff reuse and recycling for
the production domestic hot water.

Referanser

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