A novel fully electrified solar heating system with a high renewable fraction - Optimal designs for a high latitude community

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A novel fully electrified solar heating system with a high renewable fraction - Optimal designs for a high latitude community. / Hirvonen, Janne; Sirén, Kai.

In: Renewable Energy, Vol. 127, 01.11.2018, p. 298-309.

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@article{30cc373d831842a0a6604ccdfb0d988c,
title = "A novel fully electrified solar heating system with a high renewable fraction - Optimal designs for a high latitude community",
abstract = "Solar energy use in Nordic countries suffers from a high seasonal mismatch of generation and demand. However, given a large enough community, seasonal thermal storage could be utilized to store summertime heat gains for use in winter. This simulation study examined a Finnish case of fully electric solar heating, where heat pumps (HP) powered by photovoltaic (PV) panels were used for generating heat for both immediate use and for seasonal storage through a borehole thermal energy storage (BTES) system. Multi-objective optimization of LCC and energy use was performed by a genetic algorithm and TRNSYS simulations. Comparison was done between communities of a 100 and 500 buildings. The need for purchased electricity was between 40 and 26 kWh/m2 per year for the optimal configurations. For the same cases the life cycle cost was between 220 and 340 €/m2. Up to 98{\%} renewable energy fraction was obtained for heating, showing that even in Finland it is possible to provide practically all heating by solar energy. The PV-type heating system was also compared to a solar thermal heating system from a previous study and it was found that the new design had as much as 36{\%} lower life cycle cost.",
keywords = "Heat pump, Optimization, Seasonal thermal energy storage, Solar district heating, Solar electricity",
author = "Janne Hirvonen and Kai Sir{\'e}n",
year = "2018",
month = "11",
day = "1",
doi = "10.1016/j.renene.2018.04.028",
language = "English",
volume = "127",
pages = "298--309",
journal = "Renewable Energy",
issn = "0960-1481",

}

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TY - JOUR

T1 - A novel fully electrified solar heating system with a high renewable fraction - Optimal designs for a high latitude community

AU - Hirvonen, Janne

AU - Sirén, Kai

PY - 2018/11/1

Y1 - 2018/11/1

N2 - Solar energy use in Nordic countries suffers from a high seasonal mismatch of generation and demand. However, given a large enough community, seasonal thermal storage could be utilized to store summertime heat gains for use in winter. This simulation study examined a Finnish case of fully electric solar heating, where heat pumps (HP) powered by photovoltaic (PV) panels were used for generating heat for both immediate use and for seasonal storage through a borehole thermal energy storage (BTES) system. Multi-objective optimization of LCC and energy use was performed by a genetic algorithm and TRNSYS simulations. Comparison was done between communities of a 100 and 500 buildings. The need for purchased electricity was between 40 and 26 kWh/m2 per year for the optimal configurations. For the same cases the life cycle cost was between 220 and 340 €/m2. Up to 98% renewable energy fraction was obtained for heating, showing that even in Finland it is possible to provide practically all heating by solar energy. The PV-type heating system was also compared to a solar thermal heating system from a previous study and it was found that the new design had as much as 36% lower life cycle cost.

AB - Solar energy use in Nordic countries suffers from a high seasonal mismatch of generation and demand. However, given a large enough community, seasonal thermal storage could be utilized to store summertime heat gains for use in winter. This simulation study examined a Finnish case of fully electric solar heating, where heat pumps (HP) powered by photovoltaic (PV) panels were used for generating heat for both immediate use and for seasonal storage through a borehole thermal energy storage (BTES) system. Multi-objective optimization of LCC and energy use was performed by a genetic algorithm and TRNSYS simulations. Comparison was done between communities of a 100 and 500 buildings. The need for purchased electricity was between 40 and 26 kWh/m2 per year for the optimal configurations. For the same cases the life cycle cost was between 220 and 340 €/m2. Up to 98% renewable energy fraction was obtained for heating, showing that even in Finland it is possible to provide practically all heating by solar energy. The PV-type heating system was also compared to a solar thermal heating system from a previous study and it was found that the new design had as much as 36% lower life cycle cost.

KW - Heat pump

KW - Optimization

KW - Seasonal thermal energy storage

KW - Solar district heating

KW - Solar electricity

UR - http://www.scopus.com/inward/record.url?scp=85046102070&partnerID=8YFLogxK

U2 - 10.1016/j.renene.2018.04.028

DO - 10.1016/j.renene.2018.04.028

M3 - Article

VL - 127

SP - 298

EP - 309

JO - Renewable Energy

JF - Renewable Energy

SN - 0960-1481

ER -

ID: 20585560