Browsing by Author "Marijuan, Antonio Garrido"
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Item District Heating De-Carbonisation in Belgrade. Multi-Year transition plan(2020-11-20) Marijuan, Antonio Garrido; Garay, Roberto; Lumbreras, Mikel; Vladic, Ljubisa; Savić, Radmilo; Savic, Radmilo; EDIFICACIÓN DE ENERGÍA POSITIVA; Tecnalia Research & InnovationA large share of the city of Belgrade is heated by a District Heating network. Established in 1965, the network delivers 3.6 TWh to more than 20 million square meters of households industries and businesses, by means of a 1460km-long network. The system has been continuously upgraded and adapted to new technologies and already operates at relatively low temperature, with modernized substations. However, the delivered heat is still produced mainly by means of carbon intensive technologies. Conscious of the need to de-carbonise the city, a multi-year transition plan was established, where large investments have been secured, comprising greater interconnection levels, installation of large solar thermal plants and waste incineration plants, and the conversion of a power plant into CHP, among others. In this paper, the criteria for the selection of the technologies, the identification of enabling investments, interaction with stakeholders, securing of financing, and status of the plan are presented. After the execution of the de-carbonisation roadmap, it is expected that the DH system will reduce its carbon intensity by 50%.Item Energy meters in District-Heating Substations for Heat Consumption Characterization and Prediction Using Machine-Learning Techniques(2020-11-20) Lumbreras, Mikel; Garay, Roberto; Marijuan, Antonio Garrido; Tecnalia Research & Innovation; EDIFICACIÓN DE ENERGÍA POSITIVAThe use of smart energy meters enables the monitoring of large quantity of data related to heat consumption patterns in buildings connected to DH networks. This information can be used to understand the interaction between building and the final users´ without accurate information about building characteristics and occupational rates. In this paper an intuitive and clarifier data-driven model is presented, which couples heat demand and weather variables. This model enables the disaggregation of Space-Heating & Domestic Hot water demand, characterization of the total heat demand and the forecasting for the next hours. Simulations for 53 building have been carried out, with satisfactory results for most of them, reaching R2 values above 0.9 in some of them.Item Integration of Renewables in DHC for Sustainable Living Workshop(MDPI, 2021-01) Vázquez, María Victoria Cambronero; Corscadden, Jack; Marijuan, Antonio Garrido; Barbagelata, Giulia; Hamann, Georg; Grosjean, Matthieu; Mendoza, NoraThere is a large potential to integrate substantial shares of renewable energy and waste heat sources in district heating and/or cooling networks (DHC), reducing dependency of DHC on fossil fuels and ultimately leading to a more efficient and sustainable energy system. Several EU funded projects are currently working on this topic. The objective of the workshop aimed to share the WEDISTRICT project concept with other sister projects and interested stakeholders in order to exchange new ideas, lessons learnt from implementation and proposals about the successful integration of renewable technologies in DHC and urban regeneration.Item RELaTED Project: New Developments on Ultra-Low Temperature District Heating Networks(Multidisciplinary Digital Publishing Institute (MDPI), 2020-12-25) Marijuan, Antonio Garrido; Garay, Roberto; Lumbreras, Mikel; Sánchez, Víctor; Macias, Olga; Rozas, Juan Perez Sainz DeDistrict heating networks deliver around 13% of the heating energy in the EU, being considered as a key element of the progressive decarbonization of Europe. The H2020 REnewable Low TEmperature District project (RELaTED) seeks to contribute to the energy decarbonization of these infrastructures through the development and demonstration of the following concepts: reduction in network temperature down to 50 °C, integration of renewable energies and waste heat sources with a novel substation concept, and improvement on building-integrated solar thermal systems. The coupling of renewable thermal sources with ultra-low temperature district heating (DH) allows for a bidirectional energy flow, using the DH as both thermal storage in periods of production surplus and a back-up heating source during consumption peaks. The ultra-low temperature enables the integration of a wide range of energy sources such as waste heat from industry. Furthermore, RELaTED also develops concepts concerning district heating-connected reversible heat pump systems that allow to reach adequate thermal levels for domestic hot water as well as the use of the network for district cooling with high performance. These developments will be demonstrated in four locations: Estonia, Serbia, Denmark, and Spain.