Smart grid and PV driven ground heat pump as thermal battery in small buildings for optimized electricity consumption

Thür, Alexander; Calabrese, Toni; Streicher, Wolfgang

doi:10.1016/j.solener.2018.08.087

Cited by 35 publications

(10 citation statements)

References 5 publications

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“…The SolPol system simulation study is based on the simulation studies of system 12 (TheBat, Thür et al, 2017a), where electrical driven heat pumps in combination with thermally activated building systems (TABS, here a standard floor heating system is used) and conventional hot water storages (TES) are used as thermal battery for electricity produced by photovoltaic systems.…”

Section: Solpol (By: Uibk; St; Sh+dhw)mentioning

confidence: 99%

“…Simulations within the project TheBat (Thür et al, , 2017a are done for a single family house (based on the IEA SHC Task44 reference building; (Dott et al, 2012;Dott et al, 2013)) designed as low energy standard (RES45: 45 kWh/m 2 a space heating consumption, SH) at Innsbruck climate with thermal active mass by floor heating. The reference floor area is 140 m 2 , the room temperature is controlled to 21°C ± 0.5K and the domestic hot water (DHW) consumption at 45°C tap temperature is 2,175 kWh per year.…”

Section: Thebat (By: Uibk; Pv; Sh+dhw)mentioning

confidence: 99%

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Monitoring data analysis on technical issues & on performances

Köll¹,

Neyer²

2019

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Section: Solpol (By: Uibk; St; Sh+dhw)mentioning

confidence: 99%

Section: Thebat (By: Uibk; Pv; Sh+dhw)mentioning

confidence: 99%

Monitoring data analysis on technical issues & on performances

Köll¹,

Neyer²

2019

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“…In particular, ground-source heat pumps were extensively used due to their high efficiency, low environmental impact and good adaptability to renewable energy sources [13]. Different control strategy [14], thermal storage [15] and battery storage [16] options were examined in such systems to maximize the solar contribution to the energy demands and to lower the greenhouse gas emissions.…”

Section: Introductionmentioning

confidence: 99%

Technoeconomic assessments of hybrid photovoltaic-thermal vs. conventional solar-energy systems: Case studies in heat and power provision to sports centres

et al. 2019

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This paper presents a comprehensive analysis of the energy, economic and environmental potentials of hybrid photovoltaicthermal (PVT) and conventional solar energy systems for combined heat and power provision. A solar combined heat and power (S-CHP) system based on PVT collectors, a solar-power system based on PV panels, a solar-thermal system based on evacuated tube collectors (ETCs), and a S-CHP system based on a combination of side-by-side PV panels and ETCs (PV-ETC) are assessed and compared. A natural gas fired internal combustion engine (ICE) CHP system is also analysed as a competing fossil-fuel based solution. Annual simulations are conducted for the provision of electricity, along with space heating, swimming pool heating and hot water to the University Sports Centre of Bari, Italy. The results show that, based on a total installation area of 4000 m 2 in all cases, the PVT S-CHP system outperforms the other systems in terms of total energy output, with annual electrical and thermal energy yields reaching 82.3 % and 51.3 % of the centre's demands respectively. As a booming solar technology, the PV system is the most profitable solar solution with the shortest payback time (9.4 years) and lowest levelised cost of energy (0.089 €/kWh). Conversely, the ETC solar-thermal system is economically inviable for the sports centre application and increasing the ETC area share in the combined PV-ETC S-CHP system is unfavourable due to the low natural gas price. Although the PVT S-CHP system has the highest investment cost, the high annual revenue from the avoided energy bills elevates its economic performance to between those of the conventional PV and ETC-based energy systems, with a payback time of 13.7 years and a levelised cost of energy of 0.109 €/kWh. At 445 tCO 2 /year, the CO 2 emission reduction potential of the PVT S-CHP system is considerably higher than those of the all other solar systems (254-317 tCO 2 /year). Compared to the solar energy systems, the ICE CHP system has the shortest payback time (6.2 years), but its CO 2 emission reduction (25 tCO 2 /year) is significantly lower. A high carbon price is beneficial for improving the cost-competitiveness of the solar energy systems, in particular the PVT S-CHP system, which would further boost its market penetration, helping to meet the carbon emission targets.

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“…At the same time the demand for solutions enabling a high self-consumption of electricity from PV plants has strongly increased due to the decrease of feed-in tariffs for PV electricity and as possibility for stabilizing the electricity grid. Strategies for increasing PV selfconsumption for heating systems with heat pumps have recently been analysed by system simulations in [2] for an air source heat pump, in [3] for a ground source heat pump system, and in [4] for an air-and ground source heat pump, all of them reporting promising results.…”

Section: Introductionmentioning

confidence: 99%

Combinations of heat pump and photovoltaics for renovated buildings

Heinz

Gaber

2019

E3S Web Conf.

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The aim of this work is the analysis of hybrid heating systems consisting of an air source heat pump, a storage tank and a photovoltaic (PV) system for the use in renovated residential buildings. The potential for decreasing the electrical energy consumption of the heat pump from the grid by targeted operation of the speed controlled compressor with electricity from PV is determined by means of dynamic system simulations in TRNSYS for a renovated single family house under the assumption that the existing radiator heating system is not replaced, and that therefore relatively high supply temperatures are necessary. Different variants were considered with regard to the size of the PV system, the storage volume and the influence of the heat emission system.

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Smart grid and PV driven ground heat pump as thermal battery in small buildings for optimized electricity consumption

Cited by 35 publications

References 5 publications

Monitoring data analysis on technical issues & on performances

Monitoring data analysis on technical issues & on performances

Technoeconomic assessments of hybrid photovoltaic-thermal vs. conventional solar-energy systems: Case studies in heat and power provision to sports centres

Combinations of heat pump and photovoltaics for renovated buildings

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