Cost optimal and net zero energy office buildings solutions using small scale biomass-based cogeneration technologies

Ayman Mohamed, Ala Hasan, Kai Siren

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)

Abstract

In this study, four different small scale biomass-based cogeneration heat and power (CHP) technologies along with three conventional energy generation systems serving an office building in Helsinki, Finland are investigated to find the local cost-optimal solutions for minimum energy performance for each as well as the global cost optimal solution. The Energy Performance of Building Directive (EPBD) comparative framework methodology is followed. All building combinations are simulated by IDA-ICE 4.5 software including building energy efficiency measures/packages; external wall insulation, window type, and envelope air-tightness, and building service system packages including ventilation system, and daylight control. The reference case is defined consisting of reference building built in accordance with the current building code served by district heating and vapor compression cycle cooling system (DH-VCR). The results show that the pellet boiler with vapor compression refrigeration system (PB-VCR) has global cost-optimal solution. When the CHP capacities are sized to cover the peak thermal demands, the low power-to-heat (P/H) ratio CHP technologies have life cycle cost (LCC) less than the reference case, while the CHP technologies with high P/H have higher LCC. The reason of that is the high investment cost relating to higher associated electrical capacities as well as high operational energy costs due to lower thermal efficiency. However, optimizing the CHP capacity and installing auxiliary pellet boiler makes that all investigatedCHP technologies have LCC less than the reference case. Furthermore, the net zero energy building (NZEB) solutions extended - by implementing photovoltaic system (PV) - for the cost-optimal solutions have lower LCC than those extended based minimum energy performance solutions.
Original languageEnglish
Title of host publicationBuilding Simulation Applicatiosn BSA 2015
Subtitle of host publicationProceedings of 2nd IBPSA-Italy conference
Number of pages10
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
Event2nd IBPSA-Italy Conference, Building Simulation Applications, BSA 2015 - Bozen-Bolzano, Italy
Duration: 4 Feb 20156 Feb 2015

Conference

Conference2nd IBPSA-Italy Conference, Building Simulation Applications, BSA 2015
Abbreviated titleBSA 2015
CountryItaly
CityBozen-Bolzano
Period4/02/156/02/15

Fingerprint

Office buildings
Biomass
Costs
Life cycle
Boilers
Vapor compression refrigeration
Videocassette recorders
Hot Temperature
District heating
Cooling systems
Ventilation
Energy efficiency
Insulation
Vapors

Keywords

  • cost optimal
  • net zero energy office buildings
  • small scale biomass-based cogeneration

Cite this

Mohamed, A., Hasan, A., & Siren, K. (2015). Cost optimal and net zero energy office buildings solutions using small scale biomass-based cogeneration technologies. In Building Simulation Applicatiosn BSA 2015: Proceedings of 2nd IBPSA-Italy conference
Mohamed, Ayman ; Hasan, Ala ; Siren, Kai. / Cost optimal and net zero energy office buildings solutions using small scale biomass-based cogeneration technologies. Building Simulation Applicatiosn BSA 2015: Proceedings of 2nd IBPSA-Italy conference. 2015.
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abstract = "In this study, four different small scale biomass-based cogeneration heat and power (CHP) technologies along with three conventional energy generation systems serving an office building in Helsinki, Finland are investigated to find the local cost-optimal solutions for minimum energy performance for each as well as the global cost optimal solution. The Energy Performance of Building Directive (EPBD) comparative framework methodology is followed. All building combinations are simulated by IDA-ICE 4.5 software including building energy efficiency measures/packages; external wall insulation, window type, and envelope air-tightness, and building service system packages including ventilation system, and daylight control. The reference case is defined consisting of reference building built in accordance with the current building code served by district heating and vapor compression cycle cooling system (DH-VCR). The results show that the pellet boiler with vapor compression refrigeration system (PB-VCR) has global cost-optimal solution. When the CHP capacities are sized to cover the peak thermal demands, the low power-to-heat (P/H) ratio CHP technologies have life cycle cost (LCC) less than the reference case, while the CHP technologies with high P/H have higher LCC. The reason of that is the high investment cost relating to higher associated electrical capacities as well as high operational energy costs due to lower thermal efficiency. However, optimizing the CHP capacity and installing auxiliary pellet boiler makes that all investigatedCHP technologies have LCC less than the reference case. Furthermore, the net zero energy building (NZEB) solutions extended - by implementing photovoltaic system (PV) - for the cost-optimal solutions have lower LCC than those extended based minimum energy performance solutions.",
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Mohamed, A, Hasan, A & Siren, K 2015, Cost optimal and net zero energy office buildings solutions using small scale biomass-based cogeneration technologies. in Building Simulation Applicatiosn BSA 2015: Proceedings of 2nd IBPSA-Italy conference. 2nd IBPSA-Italy Conference, Building Simulation Applications, BSA 2015, Bozen-Bolzano, Italy, 4/02/15.

Cost optimal and net zero energy office buildings solutions using small scale biomass-based cogeneration technologies. / Mohamed, Ayman; Hasan, Ala; Siren, Kai.

Building Simulation Applicatiosn BSA 2015: Proceedings of 2nd IBPSA-Italy conference. 2015.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Cost optimal and net zero energy office buildings solutions using small scale biomass-based cogeneration technologies

AU - Mohamed, Ayman

AU - Hasan, Ala

AU - Siren, Kai

PY - 2015

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N2 - In this study, four different small scale biomass-based cogeneration heat and power (CHP) technologies along with three conventional energy generation systems serving an office building in Helsinki, Finland are investigated to find the local cost-optimal solutions for minimum energy performance for each as well as the global cost optimal solution. The Energy Performance of Building Directive (EPBD) comparative framework methodology is followed. All building combinations are simulated by IDA-ICE 4.5 software including building energy efficiency measures/packages; external wall insulation, window type, and envelope air-tightness, and building service system packages including ventilation system, and daylight control. The reference case is defined consisting of reference building built in accordance with the current building code served by district heating and vapor compression cycle cooling system (DH-VCR). The results show that the pellet boiler with vapor compression refrigeration system (PB-VCR) has global cost-optimal solution. When the CHP capacities are sized to cover the peak thermal demands, the low power-to-heat (P/H) ratio CHP technologies have life cycle cost (LCC) less than the reference case, while the CHP technologies with high P/H have higher LCC. The reason of that is the high investment cost relating to higher associated electrical capacities as well as high operational energy costs due to lower thermal efficiency. However, optimizing the CHP capacity and installing auxiliary pellet boiler makes that all investigatedCHP technologies have LCC less than the reference case. Furthermore, the net zero energy building (NZEB) solutions extended - by implementing photovoltaic system (PV) - for the cost-optimal solutions have lower LCC than those extended based minimum energy performance solutions.

AB - In this study, four different small scale biomass-based cogeneration heat and power (CHP) technologies along with three conventional energy generation systems serving an office building in Helsinki, Finland are investigated to find the local cost-optimal solutions for minimum energy performance for each as well as the global cost optimal solution. The Energy Performance of Building Directive (EPBD) comparative framework methodology is followed. All building combinations are simulated by IDA-ICE 4.5 software including building energy efficiency measures/packages; external wall insulation, window type, and envelope air-tightness, and building service system packages including ventilation system, and daylight control. The reference case is defined consisting of reference building built in accordance with the current building code served by district heating and vapor compression cycle cooling system (DH-VCR). The results show that the pellet boiler with vapor compression refrigeration system (PB-VCR) has global cost-optimal solution. When the CHP capacities are sized to cover the peak thermal demands, the low power-to-heat (P/H) ratio CHP technologies have life cycle cost (LCC) less than the reference case, while the CHP technologies with high P/H have higher LCC. The reason of that is the high investment cost relating to higher associated electrical capacities as well as high operational energy costs due to lower thermal efficiency. However, optimizing the CHP capacity and installing auxiliary pellet boiler makes that all investigatedCHP technologies have LCC less than the reference case. Furthermore, the net zero energy building (NZEB) solutions extended - by implementing photovoltaic system (PV) - for the cost-optimal solutions have lower LCC than those extended based minimum energy performance solutions.

KW - cost optimal

KW - net zero energy office buildings

KW - small scale biomass-based cogeneration

M3 - Conference article in proceedings

SN - 978-88-6046-074-5

BT - Building Simulation Applicatiosn BSA 2015

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Mohamed A, Hasan A, Siren K. Cost optimal and net zero energy office buildings solutions using small scale biomass-based cogeneration technologies. In Building Simulation Applicatiosn BSA 2015: Proceedings of 2nd IBPSA-Italy conference. 2015