Incorporating a distributed, local waste heat source into the LTDH grid

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As the temperature in the DH grids generally, and LTDH grids specifically, is gradually lowered it allows for new types of production to be included in the grid. The value of waste heat from “prosumers” has been considered too low in terms of temperature and volume, but that is no longer the case.

Draft design manual for new pipe components for LTDH distribution systems underground

The implementation of LTDH network and the development of the DH pipes production allow the use of in flexible plastic pipes also for main lines. This deliverable provides the draft of the installation manual of the new pipe components for LTDH distribution systems in Høje-Taastrup and Lund.

Calculator on savings for new high-efficient pipe types for internal distribution in buildings

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This deliverable presents the calculation tool and guidelines for calculating the heat loss from the distribution pipes in buildings.
Per-Olof Johansson Kallioniemi from Lund University

Improved use of individual metering concepts

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In COOL DH we have studied how to improve individual metering concepts and ways of using gathered data for billing district heating. In the report Improved use of individual metering concepts, we provide an overview of regulations on district heating metering and billing in Sweden and Denmark and an overview on applications to use on customer’s meter readings for energy efficiency improvements.
Emanuele Zilio

New design concepts for optimisation of LTDH distribution systems

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In this report you will learn about the design process of a low-temperature district heating network, highlighting the design factors that lead to reduction of heat losses in the distribution pipes. To demonstrate the technology, two real-scale demonstration projects are described in Høje-Taastrup, Denmark and in Lund, Sweden. Emanuele Zilio, engineer at COWI A/S, gave a short interview to summarize the report

Watch the recorded Innovation webinar

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On the Innovation webinar we presented some of the main findings from COOL DH first year with focus on innovations for low temperature district heating.

Solutions for avoiding risk of Legionella

Low temperatures in domestic hot water systems increases the risk of growth of Legionella bacteria which if inhaled can cause Pontiac fever or Legionnaires' disease. Lund University, Kraftringen and COWI have worked on a report that investigates solutions for avoiding risk of Legionella when using LTDH. Kerstin Sernhed from Lund University (Dept. of Energy Sciences) introduces the report.
Lund 180620 Sara Kralmark på Kraftringen. Foto: André de Loisted

LTDH connected appliances – eliminating electricity topping of temperature

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Kraftringen and COWI A/S have produced this report that shortly describes the technology and history of HWC (Heating Water Circuit) appliances, as well as traditional dishwashers that are connected to hot tap water and washing machines with both hot and cold water connections.

How to optimize cascade couplings for best use of low temperature sources

Kraftringen and COWI A/S have worked together on a paper that describes the analysis of energy efficiency in heat pump systems that recover waste heat from low temperature heat sources for District Heating. Martin Gierow, chemical engineer and…