Identifying techno-economic improvements for a steam generating heat pump with exergy-based costs minimization

Brendon de Raad*, Marit van Lieshout, Lydia Stougie, Andrea Ramirez

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Steam generating heat pumps show great potential for reducing carbon emissions in the industrial sector. However, predicting their performance is challenging as the exergy destruction of e.g., compressors and expansion valves increases with the temperature lift and condenser temperature. With over seventy design improvements mentioned in the literature, selecting the most effective design improvements is crucial. In this study, energy and exergy-based methods were compared in their ability to identify design improvements for a single stage subcritical heat pump to produce steam from hot condensate. The energy-based method suggested the addition of a sequential compressor with an intermediate cooler; however, this design did not improve the heat pump's techno-economic performance. The suggestion of adding either an internal heat exchanger or a flash vessel by exergy-based methods did lead in both cases to improved techno-economic performance. The internal heat exchanger performed best and increased the coefficient of performance from 2.3 to 2.8 and reduced operational costs by 0.8 M€ after 5 years of operation. Additionally, the initial investment decreased by 135 k€, and the total costs of operation decreased from 10.3 M€ to 8.7 M€. These findings show that exergy-based methods are the way forward in identifying effective design improvements for steam generating heat pumps.

Original languageEnglish
Title of host publication36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2023
PublisherInternational Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
Pages884-895
ISBN (Electronic)978-171387492-8
DOIs
Publication statusPublished - 2023
Event36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2023 - Las Palmas de Gran Canaria, Spain
Duration: 25 Jun 202330 Jun 2023

Publication series

Name36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2023

Conference

Conference36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2023
Country/TerritorySpain
CityLas Palmas de Gran Canaria
Period25/06/2330/06/23

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • advanced heat pump configuration
  • Exergy-based costs minimization
  • High-temperature heat pump
  • Steam generation
  • Techno-economic analysis

Fingerprint

Dive into the research topics of 'Identifying techno-economic improvements for a steam generating heat pump with exergy-based costs minimization'. Together they form a unique fingerprint.

Cite this