Higher ground source heat pump COP in a residential building through the use of solar thermal collectors

Girard, Aymeric; Gago, Eulalia Jadraque; Muneer, Tariq; Cáceres, Gustavo

doi:10.1016/j.renene.2015.01.063

Cited by 114 publications

(39 citation statements)

References 54 publications

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“…Girard, et al [31] studied a space heating system for a single family house with solar thermal collectors and ground source heat pumps for 19 European cities at different latitudes. A system with only a ground source heat pump, as well as a system with only electrical radiant heaters, were evaluated as references.…”

Section: System Designmentioning

confidence: 99%

“…The performance of PV/T systems are often compared to PV and solar thermal systems, or only PV systems [26][27][28][29][30]. The combination of PV/T modules and ground source heat pumps are compared to systems with only ground source heat pumps, direct grid electricity, or ground source heat pumps and other solar technologies [31][32][33][34][35]. Comparative analyses are also used to evaluate the environmental impact of PV/T modules, where they are compared to PV modules, direct use of grid electricity, or gas boilers [36][37][38][39].…”

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confidence: 99%

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Embodied greenhouse gas emissions from PV systems in Norwegian residential Zero Emission Pilot Buildings

et al. 2016

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Printed by NTNU Grafisk senter i This thesis concerns the use of solar energy in energy efficient buildings. More precisely, the topic is photovoltaic-thermal (PV/T) solar energy systems, and how these can be used to provide renewable energy in zero emission buildings. PV/T modules are a hybrid between photovoltaic (PV) modules and solar thermal collectors, and therefore generate electricity and thermal energy simultaneously. The objective of the thesis was to investigate the potential of PV/T systems to minimize the life cycle greenhouse gas emissions of a residential building.The building sector accounts for around one third of the global energy use and about half of the electricity use, and is therefore a key area to focus on in the effort to mitigate climate change and to create more sustainable societies in the future. The environmental impact of buildings need to be lowered by reducing the energy demand during construction and operation, but also by replacing polluting energy sources with renewable ones. The European Union has demanded of its member states that all new buildings shall be nearly zero energy buildings by 2020.Solar energy is well-suited to use in buildings, and can supply electricity, lighting, heating, and cooling. Once installed, a solar energy system supplies energy without pollution, is silent, have few or no moving parts, and can also be integrated into the building itself. In order to do investigate how PV/T systems can best be used in buildings to minimize life cycle emissions, the systems have been studied both in terms of energy performance and in terms of greenhouse gas emissions.The main research method in this thesis has been simulation of solar energy systems in buildings. Using simulations, PV/T systems have been compared to other solar energy systems with separate PV modules and solar thermal collectors. The simulation studies were performed in the simulation programs Polysun and PVsyst, and were based on commercial solar energy products available on the current market. The use of heat pumps, air-source and ground-source, in combination with solar energy systems was also studied.Two case buildings, the ZEB residential concept and the Living Lab, have been used in the simulation studies. The buildings are two of the pilot buildings of the Norwegian Research Centre for Zero Emission Buildings (the ZEB Centre). Both buildings are single family residential buildings located in Central or Southern Norway, and are designed to meet the Norwegian passive house requirements.The embodied emissions of the solar energy systems were determined using elements of life cycle assessments (LCA). A review of previous research found few studies of the environmental impact of PV/T modules, especially using industrially produced modules. The embodied emissions of such a PV/T module was therefore determined in this thesis, based on a combination of data from databases and information from module producers. The embodied emissions of the case buildings and the other solar energy systems studied were d...

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Section: System Designmentioning

confidence: 99%

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confidence: 99%

Embodied greenhouse gas emissions from PV systems in Norwegian residential Zero Emission Pilot Buildings

et al. 2016

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“…New and improved technology for energy efficiency provides cost-effective solutions that are projected to achieve 2-to-10-fold reductions in the energy consumption of individual buildings. Key technologies include mechanisms for daylighting and electric lighting control [5], high performance building envelopes [6], advanced heating, ventilating, and air-conditioning (HVAC) systems [7,8], and intelligent energy management systems [9]. Regardless, the energy saving potential of these advanced technologies has not always materialized in practice due to an insufficient understanding of the significant role of occupant behavior in the energy consumption of buildings.…”

Section: Introductionmentioning

confidence: 99%

Cooling Energy Implications of Occupant Factor in Buildings under Climate Change

Lim

Yun

2017

Sustainability

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Occupant factor is a critical element in the overall energy consumption of buildings. This study aims to reveal how occupant factors influence the energy consumption of example buildings in Seoul, Tokyo, and Hong Kong under climate change projections, and to prioritize factors with energy saving potential for buildings in consideration of future climate change. The study finds that the cooling degree-hours base of 23.3 • C in the three cities sharply increases with future climate change by analyzing future hourly weather data produced herein. Simulations are made with EnergyPlus Runtime Language (Erl) for modeling occupant behavior. The simulation results reveal that a dynamic thermostat control based on an adaptive comfort model is an effective method to reduce cooling energy consumption under future climate change, reducing cooling energy consumption by up to 18% in some instances. In particular, we reveal that a combined application of the adaptive comfort control, nighttime ventilation, and the use of occupancy-based lighting and equipment result in reducing cooling energy consumption by 28%. The outcomes of this study are potentially useful in providing cost-effective solutions to adapt buildings for future climate change with simple modifications to occupant behavior. Also, the roles of renewable energy are briefly discussed.

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“…In a study by Girard, a performance analysis was conducted by simulating a hybrid operation geothermal heat pump system and a general geothermal heat pump system to improve the performance of the hybrid operation of solar and geothermal heat pump systems [16]. The problems of the operation of a geothermal source heat pump system were derived through an investigation of the building where the system was installed, a complex operation method with an absorption chiller-heater was then proposed to increase the share ratio of the geothermal heat pump system, and the method was evaluated through a simulation [17].…”

Section: Introductionmentioning

confidence: 99%

Development of a Variable Water Flow Rate Control Method for the Circulation Pump in a Geothermal Heat Pump System

Shin

Cho

2018

Energies

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This study assessed a variable flow rate control method for a circulation pump based on the geothermal water temperature difference in a geothermal heat pump system. As interest in energy conservation and efficient use is increasing around the world, the development and use of renewable energy is increasing and various related studies are currently underway. Among the renewable energy systems, the interest in geothermal energy system is high because of its efficient year-round operation. Geothermal heat pump system installations have increased in number, but the systems operate inefficiently. Generally in Korea, geothermal heat pump system operates under partial load conditions, but the circulation pump operates at constant speed and supplies a constant flow rate. Therefore, this study examined the operation of the current problems of a geothermal heat pump system. A variable flow rate control method of the circulation pump is proposed to improve the efficiency of the geothermal heat pump system and save energy during the cooling operation. As a result, the total energy consumption was reduced by 57,017 kW compared to the existing flow rate control method and the energy consumption of the circulation pump system was reduced by 35,209 kW.

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Higher ground source heat pump COP in a residential building through the use of solar thermal collectors

Cited by 114 publications

References 54 publications

Embodied greenhouse gas emissions from PV systems in Norwegian residential Zero Emission Pilot Buildings

Embodied greenhouse gas emissions from PV systems in Norwegian residential Zero Emission Pilot Buildings

Cooling Energy Implications of Occupant Factor in Buildings under Climate Change

Development of a Variable Water Flow Rate Control Method for the Circulation Pump in a Geothermal Heat Pump System

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