Transition towards Positive Energy District: a case study from Latvia

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Andra Blumberga
Ieva Pakere
Ģirts Bohvalovs
Dagnija Blumberga


The transition from a fossil fuel-based energy system to renewable energy sources has become a crucial consideration in both national-scale planning processes and local-scale energy system planning. Research has been conducted to seek technical solutions for a specific district of a university campus located on the peninsula of Riga to implement a smart energy system with multiple energy sources, storage systems, and energy efficiency measures. The solutions for the transformation of Energy Island to an Energy Community include power generation by building integrated solar panels with different power storage alternatives, such as thermal storage, batteries, hydrogen, and fuel cells. The simulation also evaluates the potential for heat recovery and waste heat integration from the data center and cooling systems to cover the heat demand. The interlinkage with energy efficiency improvements through improved building management systems provides an opportunity to increase RES utilization rates and improve overall energy efficiency. To provide a holistic overview of the future development of the urban area, the research also compares the connection to the district heating network.

Results show that the analyzed energy community can achieve up to 80% of the RES self-consumption level as cost-optimal solutions by combining off-site wind turbine, solar PV panels, water source heat pumps, waste heat recovery and adjusted power storage.

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How to Cite
Blumberga, A., Pakere, I., Bohvalovs, Ģirts, & Blumberga, D. (2024). Transition towards Positive Energy District: a case study from Latvia. International Journal of Sustainable Energy Planning and Management, 41, 71–86.


European Comission C. Towards an Integrated Strategic Energy Technology (SET) Plan: Accelerating the European Energy System Transformation 2015.

Sareen S, Albert-Seifried V, Aelenei L, Reda F, Etminan G, Andreucci M-B, et al. Ten questions concerning positive energy districts. Build Environ 2022;216:109017.

Mihailova D, Schubert I, Burger P, Fritz MMC. Exploring modes of sustainable value co-creation in renewable energy communities. J Clean Prod 2022;330:129917.

Volpe R, Alriols MG, Schmalbach NM, Fichera A. Optimal design and operation of distributed electrical generation for Italian positive energy districts with biomass district heating. Energy Convers Manag 2022;267:115937.

Derkenbaeva E, Vega SH, Hofstede GJ, Leeuwen E van. Positive energy districts: Mainstreaming energy transition in urban areas. Renew Sustain Energy Rev 2022;153:111782.

Zhou Y. Sustainable energy sharing districts with electrochemical battery degradation in design, planning, operation and multi-objective optimisation. Renew Energy 2023;202:1324–41.

Bruck A, Ruano SD, Auer H. Values and implications of building envelope retrofitting for residential Positive Energy Districts. Energy Build 2022;275:112493.

Brozovsky J, Gustavsen A, Gaitani N. Zero emission neighbourhoods and positive energy districts – A state-of-the-art review. Sustain Cities Soc 2021;72:103013.

Bruck A, Ruano SD, Auer H. One piece of the puzzle towards 100 Positive Energy Districts (PEDs) across Europe by 2025: An open-source approach to unveil favourable locations of PV-based PEDs from a techno-economic perspective. Energy 2022;254:124152.

Guarino F, Rincione R, Mateu C, Teixidó M, Cabeza LF, Cellura M. Renovation assessment of building districts: Case studies and implications to the positive energy districts definition. Energy Build 2023;296:113414.

Abokersh MH, Gangwar S, Spiekman M, Vallès M, Jiménez L, Boer D. Sustainability insights on emerging solar district heating technologies to boost the nearly zero energy building concept. Renew Energy 2021;180:893–913.

Pontes Luz G, Amaro E Silva R. Modeling Energy Communities with Collective Photovoltaic Self-Consumption: Synergies between a Small City and a Winery in Portugal. Energies 2021;14:323.

Reis V, Almeida RH, Silva JA, Brito MC. Demand aggregation for photovoltaic self-consumption. Energy Rep 2019;5:54–61.

Luthander R, Widén J, Munkhammar J, Lingfors D. Self-consumption enhancement and peak shaving of residential photovoltaics using storage and curtailment. Energy 2016;112:221–31.

Zhou Y. Transition towards carbon-neutral districts based on storage techniques and spatiotemporal energy sharing with electrification and hydrogenation. Renew Sustain Energy Rev 2022;162:112444.

Laitinen A, Lindholm O, Hasan A, Reda F, Hedman Å. A techno-economic analysis of an optimal self-sufficient district. Energy Convers Manag 2021;236:114041.

Zhou Y, Cao S, Hensen JLM. An energy paradigm transition framework from negative towards positive district energy sharing networks—Battery cycling aging, advanced battery management strategies, flexible vehicles-to-buildings interactions, uncertainty and sensitivity analysis. Appl Energy 2021;288:116606.

Castillo-Calzadilla T, Garay-Martinez R, Andonegui CM. Holistic fuzzy logic methodology to assess positive energy district (PathPED). Sustain Cities Soc 2023;89:104375.

Zhang Y, Han X, Wei T, Zhao X, Zhang Y. Techno-environmental-economical performance of allocating multiple energy storage resources for multi-scale and multi-type urban forms towards low carbon district. Sustain Cities Soc 2023;99:104974.

Viesi D, Mahbub MS, Brandi A, Thellufsen JZ, Østergaard PA, Lund H, et al. Multi-objective optimization of an energy community: an integrated and dynamic approach for full decarbonisation in the European Alps. Int J Sustain Energy Plan Manag 2023;38:8–29.

Aparisi-Cerdá I, Ribó-Pérez D, Cuesta-Fernandez I, Gómez-Navarro T. Planning positive energy districts in urban water fronts: Approach to La Marina de València, Spain. Energy Convers Manag 2022;265:115795.

Hearn AX. Positive energy district stakeholder perceptions and measures for energy vulnerability mitigation. Appl Energy 2022;322:119477.

Hearn AX, Sohre A, Burger P. Innovative but unjust? Analysing the opportunities and justice issues within positive energy districts in Europe. Energy Res Soc Sci 2021;78:102127.

Pakere I, Gravelsins A, Lauka D, Bazbauers G, Blumberga D. Linking energy efficiency policies toward 4th generation district heating system. Energy 2021;234:121245.

Blumberga A, Vanaga R, Freimanis R, Blumberga D, Antužs J, Krastiņš A, et al. Transition from traditional historic urban block to positive energy block. Energy 2020;202:117485.

Pasqui M, Vaccaro G, Lubello P, Milazzo A, Carcasci C. Heat pumps and thermal energy storages centralised management in a Renewable Energy Community. Int J Sustain Energy Plan Manag 2023;38:65–82.

Ozoliņa SA, Pakere I, Jaunzems D, Blumberga A, Grāvelsiņš A, Dubrovskis D, et al. Can energy sector reach carbon neutrality with biomass limitations? Energy 2022;249:123797.

Ziemele J, Volkova A, Latõšov E, Murauskaitė L, Džiuvė V. Comparative assessment of heat recovery from treated wastewater in the district heating systems of the three capitals of the Baltic countries. Energy 2023;280:128132.

International Organization for Standardization. Energy performance of buildings Energy needs for heating and cooling, internal temperatures and sensible and latent heat loads 2022.

Volkova A, Koduvere H, Pieper H. Large-scale heat pumps for district heating systems in the Baltics: Potential and impact. Renew Sustain Energy Rev 2022;167:112749.

Del Amo A, Martínez-Gracia A, Pintanel T, Bayod-Rújula AA, Torné S. Analysis and optimization of a heat pump system coupled to an installation of PVT panels and a seasonal storage tank on an educational building. Energy Build 2020;226:110373.

Dahash A, Ochs F, Tosatto A. Techno-economic and exergy analysis of tank and pit thermal energy storage for renewables district heating systems. Renew Energy 2021;180:1358–79.

The Danish Energy Agency. Technology Data - Generation of Electricity and District heating 2020.

Vikhar PA. Evolutionary algorithms: A critical review and its future prospects. 2016 Int. Conf. Glob. Trends Signal Process. Inf. Comput. Commun. ICGTSPICC, Jalgaon, India: IEEE; 2016, p. 261–5.

Bohvalovs G, Vanaga R, Brakovska V, Freimanis R, Blumberga A. Energy Community Measures Evaluation via Differential Evolution Optimization. Environ Clim Technol 2022;26:606–15.