Physical modelling of heat pump for simultaneous space heating and hot water demand

Research output: Contribution to book/anthology/report/conference proceedingConference abstract in proceedingResearchpeer-review

Abstract

According to Danish Energy Agency, over 63 % of Danish houses are connected to District Heatng (DH) for their heatng demand where more than 70 % of DH is generated from combined heat and power (CHP). However, the supply of heat and power to residental as well as commercial buildings is not always accessible. Dense urban areas with high peak demands and complex network of pipes; and newly developed urban areas with uncertain consumpton demands pose numerous challenges on DH. Due to larger volumes of water at extremely high pressure, higher peak demands strain DH grid. Moreover, Danish energy system is exposed to strict regulatons to have all energy demands in electricity and heatng by renewable energy by 2030 and become fossil fuel independent by 2050. Implementaton of heat pumps for local heat producton mainly in urban areas can reduce the need for expensive DH grid extension and stll meet the heat demand. They can also improve fexibility in power supply by utlising the surplus electricity generated by intermitent renewable energy sources for heat producton. This paper aims to access the potental of the heat pump to provide a fexible thermal load at a smaller household level using a physical modelling approach. A dynamic model of an air-to-water, vapour-compression heat pump unit integrated with a hot water storage tank is developed. A ‘two-phase fuid’ library of MATLAB-Simscape in combinaton with ‘foundaton’ library is used to simulate the physical components such as such as evaporator, compressor, condenser, expansion valve, house, hot water storage tank and the controller. The modelling framework of the whole system is described and used to analyse simultaneous space heatng and hot water demand. An analysis of the system behaviour, based on the consumpton profle of a typical residental building in Denmark during the winter season, is presented. The physical modelling in the present work is focused on the requirements to integrate more local heat producton units, mainly in dense urban areas, to eliminate the need for new DH pipes. The results show that model satsfactorily depicts the dynamic behaviour of the Shobhana Singh is an Assistant Professor at the Department of Energy Technology, Aalborg University. She is working in the domain of thermal energy systems. She is actively engaged in various aspects of thermal energy systems such as thermal storage, heating systems, drying systems and their integration with renewable energy. She holds a MSc in Physics and a PhD in solar energy assisted drying systems heat pump with simultaneous heatng and hot water demand. In additon, the operaton of the heatng system is ensured within limits to maintain the indoor thermal comfort. The model is fexible to the changes in the physical input parameters, therefore, will be utlised to investgate performance characteristcs of heat pumpbased heatng systems for local producton.
Original languageEnglish
Title of host publicationBook of Abstract: 4th International Conference on Smart Energy Systems and 4th Generation District Heating
EditorsHenrik Lund
Number of pages2
PublisherAalborg University
Publication dateNov 2018
Pages302-303
Publication statusPublished - Nov 2018
Event4th International Conference on Smart Energy Systems and 4th Generation District Heating - Nordkraft, Aalborg, Denmark
Duration: 13 Nov 201814 Nov 2018
http://www.4dh.eu/conferences/conference-2018

Conference

Conference4th International Conference on Smart Energy Systems and 4th Generation District Heating
LocationNordkraft
CountryDenmark
CityAalborg
Period13/11/201814/11/2018
Internet address

Fingerprint

Space heating
Pumps
Water
Thermal energy
Drying
Hot Temperature
Electricity
Pipe
Heat pump systems
Thermal comfort
Complex networks
Evaporators
Thermal load
Fossil fuels
Solar energy
Water vapor
MATLAB
Compressors
Dynamic models
Compaction

Keywords

  • dynamic modelling
  • heat pump
  • Simscape
  • Two-phase fuid
  • space heatng
  • hot water storage tank

Cite this

Singh, S., Sørensen, K., Bojesen, C., & Nielsen, M. P. (2018). Physical modelling of heat pump for simultaneous space heating and hot water demand. In H. Lund (Ed.), Book of Abstract: 4th International Conference on Smart Energy Systems and 4th Generation District Heating (pp. 302-303). Aalborg University.
Singh, Shobhana ; Sørensen, Kim ; Bojesen, Carsten ; Nielsen, Mads Pagh. / Physical modelling of heat pump for simultaneous space heating and hot water demand. Book of Abstract: 4th International Conference on Smart Energy Systems and 4th Generation District Heating. editor / Henrik Lund. Aalborg University, 2018. pp. 302-303
@inbook{eba8d3bddf3b43079f11ceb51b163fab,
title = "Physical modelling of heat pump for simultaneous space heating and hot water demand",
abstract = "According to Danish Energy Agency, over 63 {\%} of Danish houses are connected to District Heatng (DH) for their heatng demand where more than 70 {\%} of DH is generated from combined heat and power (CHP). However, the supply of heat and power to residental as well as commercial buildings is not always accessible. Dense urban areas with high peak demands and complex network of pipes; and newly developed urban areas with uncertain consumpton demands pose numerous challenges on DH. Due to larger volumes of water at extremely high pressure, higher peak demands strain DH grid. Moreover, Danish energy system is exposed to strict regulatons to have all energy demands in electricity and heatng by renewable energy by 2030 and become fossil fuel independent by 2050. Implementaton of heat pumps for local heat producton mainly in urban areas can reduce the need for expensive DH grid extension and stll meet the heat demand. They can also improve fexibility in power supply by utlising the surplus electricity generated by intermitent renewable energy sources for heat producton. This paper aims to access the potental of the heat pump to provide a fexible thermal load at a smaller household level using a physical modelling approach. A dynamic model of an air-to-water, vapour-compression heat pump unit integrated with a hot water storage tank is developed. A ‘two-phase fuid’ library of MATLAB-Simscape in combinaton with ‘foundaton’ library is used to simulate the physical components such as such as evaporator, compressor, condenser, expansion valve, house, hot water storage tank and the controller. The modelling framework of the whole system is described and used to analyse simultaneous space heatng and hot water demand. An analysis of the system behaviour, based on the consumpton profle of a typical residental building in Denmark during the winter season, is presented. The physical modelling in the present work is focused on the requirements to integrate more local heat producton units, mainly in dense urban areas, to eliminate the need for new DH pipes. The results show that model satsfactorily depicts the dynamic behaviour of the Shobhana Singh is an Assistant Professor at the Department of Energy Technology, Aalborg University. She is working in the domain of thermal energy systems. She is actively engaged in various aspects of thermal energy systems such as thermal storage, heating systems, drying systems and their integration with renewable energy. She holds a MSc in Physics and a PhD in solar energy assisted drying systems heat pump with simultaneous heatng and hot water demand. In additon, the operaton of the heatng system is ensured within limits to maintain the indoor thermal comfort. The model is fexible to the changes in the physical input parameters, therefore, will be utlised to investgate performance characteristcs of heat pumpbased heatng systems for local producton.",
keywords = "dynamic modelling, heat pump, Simscape, Two-phase fuid, space heatng, hot water storage tank",
author = "Shobhana Singh and Kim S{\o}rensen and Carsten Bojesen and Nielsen, {Mads Pagh}",
year = "2018",
month = "11",
language = "English",
pages = "302--303",
editor = "Henrik Lund",
booktitle = "Book of Abstract: 4th International Conference on Smart Energy Systems and 4th Generation District Heating",
publisher = "Aalborg University",

}

Singh, S, Sørensen, K, Bojesen, C & Nielsen, MP 2018, Physical modelling of heat pump for simultaneous space heating and hot water demand. in H Lund (ed.), Book of Abstract: 4th International Conference on Smart Energy Systems and 4th Generation District Heating. Aalborg University, pp. 302-303, 4th International Conference on Smart Energy Systems and 4th Generation District Heating, Aalborg, Denmark, 13/11/2018.

Physical modelling of heat pump for simultaneous space heating and hot water demand. / Singh, Shobhana; Sørensen, Kim; Bojesen, Carsten; Nielsen, Mads Pagh.

Book of Abstract: 4th International Conference on Smart Energy Systems and 4th Generation District Heating. ed. / Henrik Lund. Aalborg University, 2018. p. 302-303.

Research output: Contribution to book/anthology/report/conference proceedingConference abstract in proceedingResearchpeer-review

TY - ABST

T1 - Physical modelling of heat pump for simultaneous space heating and hot water demand

AU - Singh, Shobhana

AU - Sørensen, Kim

AU - Bojesen, Carsten

AU - Nielsen, Mads Pagh

PY - 2018/11

Y1 - 2018/11

N2 - According to Danish Energy Agency, over 63 % of Danish houses are connected to District Heatng (DH) for their heatng demand where more than 70 % of DH is generated from combined heat and power (CHP). However, the supply of heat and power to residental as well as commercial buildings is not always accessible. Dense urban areas with high peak demands and complex network of pipes; and newly developed urban areas with uncertain consumpton demands pose numerous challenges on DH. Due to larger volumes of water at extremely high pressure, higher peak demands strain DH grid. Moreover, Danish energy system is exposed to strict regulatons to have all energy demands in electricity and heatng by renewable energy by 2030 and become fossil fuel independent by 2050. Implementaton of heat pumps for local heat producton mainly in urban areas can reduce the need for expensive DH grid extension and stll meet the heat demand. They can also improve fexibility in power supply by utlising the surplus electricity generated by intermitent renewable energy sources for heat producton. This paper aims to access the potental of the heat pump to provide a fexible thermal load at a smaller household level using a physical modelling approach. A dynamic model of an air-to-water, vapour-compression heat pump unit integrated with a hot water storage tank is developed. A ‘two-phase fuid’ library of MATLAB-Simscape in combinaton with ‘foundaton’ library is used to simulate the physical components such as such as evaporator, compressor, condenser, expansion valve, house, hot water storage tank and the controller. The modelling framework of the whole system is described and used to analyse simultaneous space heatng and hot water demand. An analysis of the system behaviour, based on the consumpton profle of a typical residental building in Denmark during the winter season, is presented. The physical modelling in the present work is focused on the requirements to integrate more local heat producton units, mainly in dense urban areas, to eliminate the need for new DH pipes. The results show that model satsfactorily depicts the dynamic behaviour of the Shobhana Singh is an Assistant Professor at the Department of Energy Technology, Aalborg University. She is working in the domain of thermal energy systems. She is actively engaged in various aspects of thermal energy systems such as thermal storage, heating systems, drying systems and their integration with renewable energy. She holds a MSc in Physics and a PhD in solar energy assisted drying systems heat pump with simultaneous heatng and hot water demand. In additon, the operaton of the heatng system is ensured within limits to maintain the indoor thermal comfort. The model is fexible to the changes in the physical input parameters, therefore, will be utlised to investgate performance characteristcs of heat pumpbased heatng systems for local producton.

AB - According to Danish Energy Agency, over 63 % of Danish houses are connected to District Heatng (DH) for their heatng demand where more than 70 % of DH is generated from combined heat and power (CHP). However, the supply of heat and power to residental as well as commercial buildings is not always accessible. Dense urban areas with high peak demands and complex network of pipes; and newly developed urban areas with uncertain consumpton demands pose numerous challenges on DH. Due to larger volumes of water at extremely high pressure, higher peak demands strain DH grid. Moreover, Danish energy system is exposed to strict regulatons to have all energy demands in electricity and heatng by renewable energy by 2030 and become fossil fuel independent by 2050. Implementaton of heat pumps for local heat producton mainly in urban areas can reduce the need for expensive DH grid extension and stll meet the heat demand. They can also improve fexibility in power supply by utlising the surplus electricity generated by intermitent renewable energy sources for heat producton. This paper aims to access the potental of the heat pump to provide a fexible thermal load at a smaller household level using a physical modelling approach. A dynamic model of an air-to-water, vapour-compression heat pump unit integrated with a hot water storage tank is developed. A ‘two-phase fuid’ library of MATLAB-Simscape in combinaton with ‘foundaton’ library is used to simulate the physical components such as such as evaporator, compressor, condenser, expansion valve, house, hot water storage tank and the controller. The modelling framework of the whole system is described and used to analyse simultaneous space heatng and hot water demand. An analysis of the system behaviour, based on the consumpton profle of a typical residental building in Denmark during the winter season, is presented. The physical modelling in the present work is focused on the requirements to integrate more local heat producton units, mainly in dense urban areas, to eliminate the need for new DH pipes. The results show that model satsfactorily depicts the dynamic behaviour of the Shobhana Singh is an Assistant Professor at the Department of Energy Technology, Aalborg University. She is working in the domain of thermal energy systems. She is actively engaged in various aspects of thermal energy systems such as thermal storage, heating systems, drying systems and their integration with renewable energy. She holds a MSc in Physics and a PhD in solar energy assisted drying systems heat pump with simultaneous heatng and hot water demand. In additon, the operaton of the heatng system is ensured within limits to maintain the indoor thermal comfort. The model is fexible to the changes in the physical input parameters, therefore, will be utlised to investgate performance characteristcs of heat pumpbased heatng systems for local producton.

KW - dynamic modelling

KW - heat pump

KW - Simscape

KW - Two-phase fuid

KW - space heatng

KW - hot water storage tank

M3 - Conference abstract in proceeding

SP - 302

EP - 303

BT - Book of Abstract: 4th International Conference on Smart Energy Systems and 4th Generation District Heating

A2 - Lund, Henrik

PB - Aalborg University

ER -

Singh S, Sørensen K, Bojesen C, Nielsen MP. Physical modelling of heat pump for simultaneous space heating and hot water demand. In Lund H, editor, Book of Abstract: 4th International Conference on Smart Energy Systems and 4th Generation District Heating. Aalborg University. 2018. p. 302-303