Naslov
The Influence of Aquifer Parameters on the Design of Extraction and Recharge Wells for the Heat Pump Systems

Autori
Strelec, Stjepan ; Dodigović, Filip ; Grabar, Kristijan ; Marinčić-Kovačev, Barica

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), stručni

Izvornik
Environ. Sci. Proc. 2021, 5(1), 24 / - : MDPI Books, 2021

Skup
3rd International Electronic Conference on Geosciences (IECG 2021)

Mjesto i datum
Online, 07.12.2021. - 13.12.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
well design ; heat pump ; aquifer ; groundwater ; hydraulic conductivity ; groundwater heat pump ; aquifer ; thermal breakthrought

Sažetak
Groundwater can be considered a non-polluting, renewable energy source. It can be used as a fluid in industrial, commercial, and residential building heating and air- conditioning systems. Usually the water table is deep enough, so atmospheric conditions have a negligible influence on water temperature. Consequently, annual temperature variation is minor, and groundwater can therefore also be considered a reliable energy source. This paper presents some aspects of the groundwater heat pump (GWHP) wells design and addresses problems that can occur during their exploitation. The heat pump system consists of two types of wells: extraction wells and recharge wells. This paper shows that the distance between the two is a crucial parameter that affects the efficiency of the whole system. An example of wells design for a production hall groundwater heat pump is given. The wells are constructed is in the northern part of Croatia. Geological and hydrogeological conditions at the site, regarding water temperature and soil hydraulic conductivity, are highly favorable. Due to insufficient distance between wells thermal breakthrough occurred, i.e. water temperature in the extraction well rose, which resulted in a lower efficiency of the GWHP system.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Građevinarstvo, Rudarstvo, nafta i geološko inženjerstvo

Napomena
Groundwater can be considered a non-polluting,
renewable energy source. It can be used as a
fluid in industrial, commercial, and
residential building heating and air-
conditioning systems. Usually the water table
is deep enough, so atmospheric conditions have
a negligible influence on water temperature.
Consequently, annual temperature variation is
minor, and groundwater can therefore also be
considered a reliable energy source. This paper
presents some aspects of the groundwater heat
pump (GWHP) wells design and addresses problems
that can occur during their exploitation. The
heat pump system consists of two types of
wells: extraction wells and recharge wells.
This paper shows that the distance between the
two is a crucial parameter that affects the
efficiency of the whole system. An example of
wells design for a production hall groundwater
heat pump is given. The wells are constructed
is in the northern part of Croatia. Geological
and hydrogeological conditions at the site,
regarding water temperature and soil hydraulic
conductivity, are highly favorable. Due to
insufficient distance between wells thermal
breakthrough occurred, i.e. water temperature
in the extraction well rose, which resulted in
a lower efficiency of the GWHP system.

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