Three-years operation experience of a ground source heat pump system in Northern Greece

Michopoulos, Apostolos; Bozis, Dimitrios; Kikidis, P. S.; Παπακώστας, Κωνσταντίνος; Κyriakis, Ν.

doi:10.1016/j.enbuild.2006.08.002

Cited by 121 publications

(31 citation statements)

References 1 publication

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“…In water to water geothermal systems, thermal energy is extracted from the ground usually by vertical closed loops, processed by the heat pump and distributed to the building, using a mix of water and propylene glycol as carrier. Ground-source heat pumps are already widely used to serve residential and commercial buildings, especially in the USA, Europe and Asia, due to their great potential for energy savings in building air conditioning and in reducing CO 2 emissions [25][26][27][28][29][30][31][32]. At present, this technology is not yet in widespread use in Italy, especially in the center and south areas, mainly because of the high initial costs (borehole drilling, about 40-55 €/m in Italy).…”

Section: The Pilot Heating/cooling System Ideasmentioning

confidence: 99%

Development of Innovative Heating and Cooling Systems Using Renewable Energy Sources for Non-Residential Buildings

et al. 2013

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Industrial and commercial areas are synonymous with high energy consumption, both for heating/cooling and electric power requirements, which are in general associated to a massive use of fossil fuels producing consequent greenhouse gas emissions. Two pilot systems, co-funded by the Italian Ministry for the Environment, have been created to upgrade the heating/cooling systems of two existing buildings on the largest industrial estate in Umbria, Italy. The upgrade was specifically designed to improve the system efficiency and to cover the overall energy which needs with renewable energy resources. In both cases a solar photovoltaic plant provides the required electric power. The first system features a geothermal heat pump with an innovative layout: a heat-storage water tank, buried just below ground level, allows a significant reduction of the geothermal unit size, hence requiring fewer and/or shorter boreholes (up to 60%-70%). In the other system a biomass boiler is coupled with an absorption chiller machine, controlling the indoor air temperature in both summer and winter. In this case, lower electricity consumption, if compared to an electric compression chiller, is obtained. The first results of the monitoring of summer cooling are presented and an evaluation of the performance of the two pilot systems is given.

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Section: The Pilot Heating/cooling System Ideasmentioning

confidence: 99%

Development of Innovative Heating and Cooling Systems Using Renewable Energy Sources for Non-Residential Buildings

et al. 2013

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“…As found out, annual primary energy savings of between 45% and 97% were achieved for the heating period compared to a conventional oil fired boiler heating, depending on the seasonal weather variations. With respect to cooling, savings between 28% and 55% were achieved, compared to conventional air-to-air heat pumps [30]. Finally, concerning the artificial lighting, fluorescent tubes are used, without any automation in the controls; the total level of lighting in offices is found to be adequate.…”

Section: Building Bmentioning

confidence: 91%

Development of an Integrated, Personalized Comfort Methodology for Office Buildings

Antoniadou

Papadopoulos

2017

Energies

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Despite the significant progress observed over the last decades, the European building stock still consumes significant amounts of energy (39% of the total final energy), whilst it does not always provide the conditions required for occupants' well-being and thermal comfort sensation. In order to achieve the goal of nearly or even zero energy buildings, a deep refurbishment of the building stock is imperative. As the literature indicates, a firm evaluation of indoor conditions is essential, while having at the epicenter the occupants' comfort perception, with emphasis on their individual characteristics. In this respect, a methodological framework is developed and a preliminary implementation is performed. The main goal of the methodological approach is the consideration of both the classical comfort parameters along with the occupants' socioeconomic and personalized characteristics that affect their perception and can differentiate their needs even under the same conditions. Among other important findings this preliminary implementation achieved some very promising results, highlighting that occupants' individual characteristics such as recycling and exercising can affect the occupants' comfort perception.

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“…The primary advantage of these systems is the use of the ground or groundwater as the heat source-sink for the heat pump instead of the outside air (Michopoulos et al, 2007). The main disadvantage of GSHP systems, compared to conventional ones, is surely the higher initial costs due to drilling for ground heat exchangers or groundwater wells.…”

Section: Introductionmentioning

confidence: 99%

Double source heat pump: A case study

Zarrella¹,

Zecchin²,

Pasquier³

et al. 2018

Proceedings of the IGSHPA Research Track 2018

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The design of a Ground Source Heat Pump (GSHP) system is critical because design choices affect the system's energy performance and operating conditions. If the thermal load profile on the ground side is unbalanced the ground temperature will change throughout the time and, consequently, also the energy efficiency of the heat pump. This phenomenon is known as "ground thermal drift". A possible solution to avoid this inconvenience is the adoption of a hybrid system. In this work a double source heat pump is investigated, i.e. the heat pump can use air or ground as heat source or heat sink. The case study is an office building located in the city of Padova (Italy). The building load profile is cooling dominant and a thermal drift can be observed in the monitoring records. A new water-to-water heat pump coupled to the boreholes and also to an air-cooled condenser was recently installed in order to tackle the thermal drift of the ground.Detailed computer simulations of the system were carried out via EnergyPlus software to investigate the energy performance of the system and the control strategy for switching between the heat sources (air or ground). The study shows the advantages of the double source heat pump.

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Three-years operation experience of a ground source heat pump system in Northern Greece

Cited by 121 publications

References 1 publication

Development of Innovative Heating and Cooling Systems Using Renewable Energy Sources for Non-Residential Buildings

Development of Innovative Heating and Cooling Systems Using Renewable Energy Sources for Non-Residential Buildings

Development of an Integrated, Personalized Comfort Methodology for Office Buildings

Double source heat pump: A case study

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