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Slovenia: Energetika Ljubljana Uses Excess Heat From Lek For District Heating

Slovenia: Energetika Ljubljana Uses Excess Heat From Lek For District Heating

Date: July 22nd 2020

Author: Tanja Srnovršnik

Category: En.vision

Topic: RES and EE , Heating

Excess heat in the form of steam condensate that Lek, which is part of Novartis, can no longer use in its processes, but which still retains a high temperature, is now being piped to Slovenian Energetika Ljubljana and fed into the district heating system. The amount of heat used in this way is enough to heat or provide sanitary hot water for roughly 300 homes, said Lek in a press release.

Lek parni kondenzat merilnikThe project to recover untapped industrial excess heat in the form of steam condensate was launched as a pilot by Energetika Ljubljana and Lek in mid-March 2020, which coincided with the time of the start of the COVID-19 epidemic, explained Lek.

“Due to the recovery of the industrial excess heat from Lek, the need for its production as well as the consequent fuel consumption at Energetika Ljubljana's facilities has thus been reduced. At the same time, both parties’ water consumption has reduced; Energetika Ljubljana by about 36,000 m3, which is equivalent to the volume of more than 14 Olympic-size pools, while the 15,000 m3 of cooling soft water saved by Lek would fill approximately six Olympic-size pools,” explained the company.

It added that since the pilot launch, the system has been running very successfully, and that both partners contribute to an annual CO2 emission reduction of 1,000 tonnes due to fuel savings.

“The idea of building a system that would enable the transfer of excess heat to the heat distribution network dates back to 2018, when, on the initiative of Lek, which is part of Novartis, expert groups from both companies met and began analysing the available quantities and heat parameters and a transfer point. The positive analysis results were followed by an agreement to start the project and in September 2019 a contract endorsing the connection of the supplier of excess heat to the recipient heat distribution system was signed,” noted Lek.

Photo: The steam condensate collector from Novartis's production of solid and sterile products in Ljubljana.



This article is available also in Slovene.



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