Definitions of ultra-low temperature district heating

District heating companies, equipment manufacturers, consultants and researchers have discussed definitions of district heating and cooling in general, and also ultra-low temperature district heating. This inform explains the different definitions and most used terms to give the reader not familiar with district heating the background of this system and the technology options. DOWNLOAD THIS DOCUMENT >> Photo by Pixabay from Pexels In the report "Benchmark for performance levels" (C. H. Christiansen, N. Winther, Ecoheat Cities WP2-report, 2012), the following indicative temperature levels and definitions were specified: DH High Temperature System (HT), 100/50 °C DH Low Temperature System (LT), 80/40 °C DH Very Low Temperature System (VLT), 60/30 °C DH Ultra Low Temperature System (ULT), 45/30 °C District cooling [...]

2019-05-02T11:22:13+00:00May 2nd, 2019|Public documents, Publications|

VIDEO: Aventa develops an innovative solar collector system for district heating

Michaela Meir, R&D manager from Aventa and leader of work package 3 in RELaTED project, explains at this video the solution that this Norwegian company is developing in this project. Both the Spanish company IMAR and Aventa are developing solar collector systems for heating. Aventa’s innovation in RELaTED is that these collector systems are decentralized at the end-user side using the district heating network as storage. The final aim is to install the developed technologies at the RELaTED demo sites. Aventa has developed and produced an all-polymeric solar collector of modular design and flexible in dimensions for building integration. Aventa has pioneer in the delivery of solar thermal collectors fully constructed in polymeric structured sheets. Due to mass production processes [...]

2019-10-17T14:07:40+00:00April 11th, 2019|Publications, Videos|

Interconnection schemes for consumer installations in relation to legionella bacteria prevention

This document elucidates specific problems and solutions for consumer connections in relation to legionella bacteria prevention and treatment, metering and billing options and control opportunities. Moreover, sketches that could be used as specific solutions for consumer interconnection schemes for three of the demonstration sites on public networks in the project are presented. DOWNLOAD THIS DOCUMENT >> The report is a continuation of the report “Low temperature concepts” and  is part of a set of reports that define the system architecture of the RELaTED concept. Distribution of Legionnaries’ disease cases per 100.000 population in the EU/EEA countries, 2016. Source: Surveillance report Legionnaires’ disease. In RELaTED Task 2.2 the design and control challenges for connections for ULT DH consumers are [...]

2019-03-15T12:35:41+00:00March 15th, 2019|Public documents, Publications|

Video: District heating solutions by RELaTED project and METRO THERM

In this video, Kasper Korsholm Østergaard, PhD, R&D Manager at METRO THERM A/S explains some details of their contribution to the RELaTED project ultra low temperature district heating concept. METRO THERM is a Danish-based company with a long tradition in the production of district heating units and heat pumps. METRO THERM is also one of the 14-companies which have coordinated their interests, technologies and investment roadmaps to develop, deploy and test the RELaTED project concept. The most relevant part of the RELaTED project for METRO THERM is the development of a triple function substation and the use of a microbooster heat pump in ultra low temperature district heating.

2019-03-22T12:41:09+00:00March 7th, 2019|Videos|

Low temperature district heating concepts

DH systems were designed many decades ago. In most cases, they are designed and operated to distribute heat at about 80 °C to consumers. RELaTED pursues the development of DH networks with service temperature levels as low as 40-50 ºC. “D.2.1 Low temperature concepts” deliverable reports on the RELaTED low temperature concepts, considering potentialities and limitations imposed by distributed energy sources (DER), low temperature (LT) and ultra-low temperature (ULT) distribution systems as well as heat and domestic hot water demand. DOWNLOAD THIS DOCUMENT >> Operational small corporate DH network in Iurreta (Basque Country, Spain). In RELaTED Task 2.1 the low temperature district heating concept is being defined, and some of the possibilities for integrating distributed energy recourses into [...]

2019-02-28T13:31:08+00:00February 28th, 2019|Public documents, Publications|

RELaTED project low temperature concepts

The deliverable D.2.1 “Low temperature concepts”  defines the RELaTED low temperature concepts, considering potentialities and limitations imposed by distributed energy sources (DER), low temperature (LT) and ultra-low temperature (ULT) distribution systems as well as heat and domestic hot water demand. […]

2019-02-06T13:10:27+00:00February 6th, 2019|Public documents, Publications|

Energy Price Assessment: an insight to energy costs in the context of District Heating

The energy price assessment performed in the document “D4.1 – Energy Price Assessment" provides a comprehensive review of the main heat production systems and primary energy sources associated with District Heating systems in Europe. Geothermal heat flow density in Europe. EC 2012. © EC, 2012. District heating (DH) systems are one of the most energy efficient heating systems in urban environments and they are also key systems in the de-carbonization of heating energy in European Cities. Renewable and waste heat sources are foreseen at the same time as de-carbonized heat sources and the way to guarantee competitive energy costs with limited influence of fossil fuel supply price volatility. To achieve this, conversion of DHs is needed. RELaTED will [...]

2018-11-16T14:26:50+00:00October 24th, 2018|Public documents, 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|