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.
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.
| Originalsprache | Englisch |
|---|---|
| Titel | 13. Internationale Energiewirtschaftstagung an der TU Wien |
| Publikationsstatus | Veröffentlicht - 2023 |
Research Field
- Efficiency in Industrial Processes and Systems