Concept study for industrial heat pumps up to 250 C heat sink temperature using radial turbo compressors

Publikation: Beitrag in Buch oder TagungsbandVortrag mit Beitrag in Tagungsband

Abstract

Today, compression heat pumps are well known as the solution for sustainable and energy
efficient industrial heat supply up to 130°C. Various projects with prototype plants on TRL7
show the technical feasibility of utilization temperatures up to about 155°C. However,
increasing the sink temperatures further up to 200°C and above leads to problems regarding
compressor technology (oil-free), refrigerant and circuit design. Within simulations, a heatpump
based on a two-stage turbo compressor using several natural and synthetic refrigerants
and mixtures is investigated. At sink temperatures above 200°C, many refrigerants must be
operated in the transcritical regime. It was found out that pentane, cyclopentane and
R1233zd(E) should be preferred for 200°C sink temperature with 110°C lift. However, the
pressure ratio is a limit for the radial turbo compressor, which is a strong argument against
cyclopentane, which has the highest COP.
OriginalspracheEnglisch
Titel13. Internationale Energiewirtschaftstagung an der TU Wien
PublikationsstatusVeröffentlicht - 2023

Research Field

  • Efficiency in Industrial Processes and Systems

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