Integration between electric heat pump and PV system to increase self-consumption of an office application

Roselli, Carlo; Sasso, Maurizio; Tariello, Francesco

doi:10.1051/rees/2017038

Cited by 9 publications

(6 citation statements)

References 16 publications

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“…DHC is particularly promising for low-temperature heat, which could be produced by solar energy [4,5], geothermal energy [6,7] and/or by waste heat recovery [8,9], and the system integration of these technologies to provide flexibility and sector coupling functionalities is particularly promising [10,11]. In this context, heat pumps (HPs) appear as an interesting option; could operate at various temperature levels according to the selected technology, working fluid and system integration level and could be coupled to photovoltaic (PV) systems and DH networks to match the residential energy demand [12,13]. Several simulation tools are available in the literature, spanning from single building-level tools such as Energy-Plus and TRNSYS, focused on high temporal resolution and time horizons from seconds to weeks, to district or national-level analyses such as Energy-PLAN and enlarging the focus to a broader integration of water, industry, transport sectors and other sector coupling possibilities.…”

Section: Introductionmentioning

confidence: 99%

Energy and Economic Assessment of Energy Efficiency Options for Energy Districts: Case Studies in Italy and Egypt

et al. 2021

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In this research, a technoeconomic comparison of energy efficiency options for energy districts located in different climatic areas (Naples, Italy and Fayoum, Egypt) is presented. A dynamic simulation model based on TRNSYS is developed to evaluate the different energy efficiency options, which includes different buildings of conceived districts. The TRNSYS model is integrated with the plug-in Google SketchUp TRNSYS3d to estimate the thermal load of the buildings and the temporal variation. The model considers the unsteady state energy balance and includes all the features of the building’s envelope. For the considered climatic zones and for the different energy efficiency measures, primary energy savings, pay back periods and reduced CO2 emissions are evaluated. The proposed energy efficiency options include a district heating system for hot water supply, air-to-air conventional heat pumps for both cooling and space heating of the buildings and the integration of photovoltaic and solar thermal systems. The energy actions are compared to baseline scenarios, where the hot water and space heating demand is satisfied by conventional natural gas boilers, the cooling demand is met by conventional air-to-air vapor compression heat pumps and the electric energy demand is satisfied by the power grid. The simulation results provide valuable guidance for selecting the optimal designs and system configurations, as well as suggest guidelines to policymakers to define decarbonization targets in different scenarios. The scenario of Fayoum offers a savings of 67% in primary energy, but the associated payback period extends to 23 years due to the lower cost of energy in comparison to Naples.

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Section: Introductionmentioning

confidence: 99%

Energy and Economic Assessment of Energy Efficiency Options for Energy Districts: Case Studies in Italy and Egypt

et al. 2021

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“…Thus, they are very appealing to produce electricity in small distributed applications. In the residential context, many solutions have been proposed to integrate solar PV systems with CCHP systems, including the hybridization of solar PV with gas-powered CCHP [17]- [20], the use of hybrid PV/thermal (PVT) solar collectors, using both non-concentrating [10], [21]- [24] and concentrating technologies [25], the integration of PV systems with electrically-driven heat pumps (EHP) [26]- [28], as well as the direct use of PV electricity for heat production [29].…”

Section: Introductionmentioning

confidence: 99%

Techno-economic analysis of solar PV power-to-heat-to-power storage and trigeneration in the residential sector

2019

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This article assesses whether it is profitable to store solar PV electricity in the form of heat and convert it back to electricity on demand. The impact of a number of technical and economic parameters on the profitability of a self-consumption residential system located in Madrid is assessed. The proposed solution comprises two kinds of heat stores: a low-or medium-grade heat store for domestic hot water and space heating, and a high-grade heat store for combined heat and power generation. Two cases are considered where the energy that is wasted during the conversion of heat into electricity is employed to satisfy either the heating demand, or both heating and cooling demands by using a thermally-driven heat pump. We compare these solutions against a reference case that relies on the consumption of grid electricity and natural gas and uses an electrically-driven heat pump for cooling. The results show that, under relatively favourable conditions, the proposed solution that uses an electrically-driven heat pump could provide electricity savings in the range of 70 -90% with a payback period of 12 -15 years, plus an additional 10 -20% reduction in the fuel consumption. Shorter payback periods, lower than 10 years, could be attained by using a highly efficient thermally driven heat pump, at the expense of increasing the fuel consumption and the greenhouse gas emissions.Hybridising this solution with solar thermal heating could enable significant savings on the global emissions, whilst keeping a high amount of savings in grid electricity (> 70 %) and a reasonably short payback period (< 12 years).

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“…Different researchers investigated energy conversion systems serving office buildings based on PV panels that can also integrate battery storage and interact with an EHP [14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…The introduction of battery leads to an abatement of electricity feeding the power grid but the high first cost of this equipment affects the economic results. A further way to improve the on-site use of PV electricity could be the use of a "mobile storage" represented by an Electric Vehicle (EV) as investigated in [17,18] starting from the system proposed in Roselli et al [15]. In particular in Roselli and Sasso [17], the authors performed an energy and environmental analysis varying PV peak power, EV charging mode and daily distance aiming the increase of on-site use of electricity available from PV plant.…”

Section: Introductionmentioning

confidence: 99%

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Integration of a Photovoltaic System with an Electric Heat Pump and Electrical Energy Storage Serving an Office Building

Roselli¹,

Tariello²,

Sasso³

2019

J. sustain. dev. energy water environ. syst.

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A renewable-based system able to meet pure electric, space heating and cooling loads of a small office building located in Southern Italy is evaluated here. The proposed energy conversion system is based on a photovoltaic plant, an electric-driven heat pump and electrical energy storage. Energy and environmental performance of this system has been evaluated by means of a dynamic simulation software changing photovoltaic nominal power (4.5-7.5 kW), battery capacity (3.2-9.6 kWh), and reference electrical system. The aim of the paper is the energy and environmental comparison on monthly, as well as, on yearly basis between the proposed system and the reference conventional system. The conventional system is based on the power grid, a natural gas fired boiler and an electric-driven chiller. The analysis here reported shows how monthly variation of electric reference system, due to different monthly Italian electricity mix production, influences the energy and environmental performance of the solar-based system. The proposed system guarantees high primary energy saving and equivalent carbon dioxide emissions reduction up to about 93%.

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Integration between electric heat pump and PV system to increase self-consumption of an office application

Cited by 9 publications

References 16 publications

Energy and Economic Assessment of Energy Efficiency Options for Energy Districts: Case Studies in Italy and Egypt

Energy and Economic Assessment of Energy Efficiency Options for Energy Districts: Case Studies in Italy and Egypt

Techno-economic analysis of solar PV power-to-heat-to-power storage and trigeneration in the residential sector

Integration of a Photovoltaic System with an Electric Heat Pump and Electrical Energy Storage Serving an Office Building

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