//Conference and scientific journals

Energy meters in District-Heating Substations for Heat Consumption Characterization and Prediction Using Machine-Learning Techniques

The 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, presented at Beyond 2020 digital event, 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 [...]

2020-11-04T13:04:03+00:00November 4th, 2020|Conference and scientific journals, Publications|

Energy & economic assessment of façade-integrated solar thermal systems combined with ultra-low temperature district-heating

Authors: Roberto Garay, project coordinator of RELaTED and Mikel Lumbreras, researcher at TECNALIA, Basque Research and Technology Alliance (BRTA). This paper, published in the journal Renewable Energy (Volume 159, October 2020, Pages 1000-1014), conducts an energy and economic assessment of District Heating (DH) integrated Solar Thermal (ST) systems. An implementation with building-integrated ST collectors coupled to a Low Temperature District Heating (LTDH) system is studied, with special focus on unglazed collectors. ST heat is exploited in the building through direct use, while excess heat is delivered to the network. A novel control strategy for heat flows in the system is proposed. A meta-analysis of several DH configurations, interconnection schemes and installed ST capacity is performed in three different climates: Sevilla (Spain), [...]

2020-10-16T10:12:53+00:00October 1st, 2020|Conference and scientific journals, Publications|

Unglazed Solar Thermal Systems for Building Integration, coupled with District Heating Systems

The connection of a solar thermal (ST) façade system to a district heating system allow for the direct use of ST heat in the building, while taking profit from the network for delivery/selling of excess heat and purchase of heat during periods of underproduction. The use of unglazed collectors for low-intrusive architectural interaction in façades is discussed. Studies are carried out on the heat production of the system and its capacity to cope with local demands. Economic studies are carried out in order to balance the investment and operational costs/profits of the system. In this paper, presented in the ICAE conference in Donostia-San Sebastian, the energy performance of a solar thermal (ST) façade system is studied in relation to its [...]

2018-08-06T13:27:41+00:00June 28th, 2018|Conference and scientific journals, Publications|

Design of consumer thermal substations for the integration of distributed solar technologies in District Heating systems

Victor Sanchez and Roberto Garay, of Tecnalia, presented a new consumer substation on the 5th International Solar District Heating Conference. This concept of substation for the connection of Solar Thermal into District Heating networks, will be developed within RELaTED project. […]

2019-09-26T12:21:08+00:00February 26th, 2018|Conference and scientific journals, Publications|

RELaTED, a flexible approach to the deployment and conversion of DH networks to low temperature

RELaTED concept was presented on the 5th International Solar District Heating Conference in Graz, Austria. Roberto Garay and Victor Sanchez, of Tecnalia, drafted a paper to describe the RELaTED decentralized Ultra-Low Temperature DH network scheme. This paper is accesible for download at this link. Below you can read the abstract of this paper. […]

2019-09-26T12:21:15+00:00February 23rd, 2018|Conference and scientific journals, Publications|