Waste heat recovery from a data centre and 5G smart poles for low-temperature district heating network

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The city of Espoo, Finland is planning to develop Kera as a green suburb with high level of energy efficiency and low CO2 emissions, using a high share of renewable energy and recycled or reused energy. For reaching this target, in this study, renewable energy resources such as solar, wind and waste heat are investigated for the study region. Two different technologies comprising heat pump (HP) and heat-only boiler (HOB) are investigated to retrieve waste heat from a data centre and LuxTurrim5G smart poles to use in a low-temperature district heating network. We investigate various scenarios to supply the required energy for the HP (which receives electricity from the electricity market, photovoltaic (PV) system, wind turbine (WT) and hybrid PV/WT; 4 scenarios) and HOB (which works with electricity, forest fuel wood, biogas, ammonia, wood pellets and industry wood residue; 6 scenarios). We found that the heat pump scenario is an efficient and cost-effective way to retrieve waste heat from the data centre and 5G smart poles with an LCOE of 3.192 ¢/kWh if electricity is produced by the PV system, and 3.516 ¢/kWh when the heat pump receives its electricity only from the electricity market.
Original languageEnglish
Article number119468
JournalEnergy
Volume218
Early online date30 Nov 2020
DOIs
Publication statusE-pub ahead of print - 30 Nov 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • low temperature district heating network
  • waste heat recovery
  • ejector expansion heat pump
  • renewable energy

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