1. Darrow K, Hedman B. Opportunities for combined heat and power in data centers. US Energy and Transportation Science Division; 2009, https://www.energy.gov/sites/prod/files/2013/11/f4/chp_data_centers.pdf [accessed 25 September 2020].
2. Shehabi A. United States data center energy usage report. Ernest Orlando Lawrence Berkeley National Laboratory; 2016. https://www.osti.gov/biblio/1372902#:%7E:text=Figure%20ES%2D1%20provides%20an,of%20total%20U.S.%20electricity%20consumption [accessed 25 September 2020].
3. IEA. Data centers and data transmission networks report; 2020. https://www.iea.org/reports/data-centres-and-data-transmission-networks [accessed 25 September 2020].
4. Vermeulen P, Patel M. State of the Dutch data centers, Go Digital Act Sustainable. Dutch Data Center Association; 2020. https://dutchitchannel.nl/647377/dda-state-of-the-dutch-data-centers.pdf [accessed 25 September 2020].
5. Future views on waste heat utilization – Case of data centers in northern Europe;Wahlroos;Renew Sustain Energy Rev,2018