The effect of introducing waste heat from electrolyzers to a power plant in-between two district heating condensers
(2024) 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2024 p.2341-2352- Abstract
The work studied the concept of introducing electrolyzer waste heat in between the district heating condensers to study the effects. This was done through IPSEpro where a model of a small-scale Swedish CHP-station was built. Two different cases were analyzed, where one CHP-station was analyzed as an existing (i.e., a fixed geometry) station and the other as a future potential station with external heat included in its design point. The components include models with the ability to be adjusted to handle off-design once set by a design point. This is meant to resemble adjusting the cycle data of an existing power plant. A pressure loss of 7 % was used for the high-pressure extraction, whilst 3 % was set for the following ones. The cycle... (More)
The work studied the concept of introducing electrolyzer waste heat in between the district heating condensers to study the effects. This was done through IPSEpro where a model of a small-scale Swedish CHP-station was built. Two different cases were analyzed, where one CHP-station was analyzed as an existing (i.e., a fixed geometry) station and the other as a future potential station with external heat included in its design point. The components include models with the ability to be adjusted to handle off-design once set by a design point. This is meant to resemble adjusting the cycle data of an existing power plant. A pressure loss of 7 % was used for the high-pressure extraction, whilst 3 % was set for the following ones. The cycle parameters were a pressure of 140 bar, turbine inlet temperature of 540°C, and steam mass flow of 40 kg/s. This corresponds to heat input and power output of around ~97 MW and ~35 MW, respectively. The added heat between the heating stages varied between 0-10 MW, where values are 0-, 1000-, 2500-, 5000-, 7500-, and 10 000-kW. The results for a currently built CHP-station with a 10 000 kW water heating showed an increase in power output and efficiency by 70kW and 0.07 %-points, respectively, when including exhaust loss and 201kW and 0.21%-points when excluding it. The study showed an added improvement when introducing external heat in the design. This improvement, at equal heat transferred, increased power output and efficiency to 144 kW and 0.15 %- points, respectively, when including exhaust loss and 210kW and 0.22 %-points, respectively, when excluding it. When decreasing the fed external heat into the system, which was designed with external heat in mind, performance worsened once passing the 2500kW mark. The most important finding is that the heat from the electrolyzer may be introduced into a CHP station -still maintaining the required forward temperature.
(Less)
- author
- Al-Soud, Mohammed Abu LU ; Kayali, Fawzi ; Hushmandi, Narmin LU and Genrup, Magnus LU
- organization
- publishing date
- 2024
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2024
- pages
- 12 pages
- publisher
- ECOS 2024
- conference name
- 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2024
- conference location
- Rhodes, Greece
- conference dates
- 2024-06-30 - 2024-07-05
- external identifiers
-
- scopus:85216935279
- ISBN
- 9798331307660
- DOI
- 10.52202/077185-0201
- language
- English
- LU publication?
- yes
- id
- df0ddeb8-f21a-4030-beab-5c37b2866f23
- date added to LUP
- 2025-06-03 08:46:01
- date last changed
- 2025-06-23 12:21:49
@inproceedings{df0ddeb8-f21a-4030-beab-5c37b2866f23,
abstract = {{<p>The work studied the concept of introducing electrolyzer waste heat in between the district heating condensers to study the effects. This was done through IPSEpro where a model of a small-scale Swedish CHP-station was built. Two different cases were analyzed, where one CHP-station was analyzed as an existing (i.e., a fixed geometry) station and the other as a future potential station with external heat included in its design point. The components include models with the ability to be adjusted to handle off-design once set by a design point. This is meant to resemble adjusting the cycle data of an existing power plant. A pressure loss of 7 % was used for the high-pressure extraction, whilst 3 % was set for the following ones. The cycle parameters were a pressure of 140 bar, turbine inlet temperature of 540°C, and steam mass flow of 40 kg/s. This corresponds to heat input and power output of around ~97 MW and ~35 MW, respectively. The added heat between the heating stages varied between 0-10 MW, where values are 0-, 1000-, 2500-, 5000-, 7500-, and 10 000-kW. The results for a currently built CHP-station with a 10 000 kW water heating showed an increase in power output and efficiency by 70kW and 0.07 %-points, respectively, when including exhaust loss and 201kW and 0.21%-points when excluding it. The study showed an added improvement when introducing external heat in the design. This improvement, at equal heat transferred, increased power output and efficiency to 144 kW and 0.15 %- points, respectively, when including exhaust loss and 210kW and 0.22 %-points, respectively, when excluding it. When decreasing the fed external heat into the system, which was designed with external heat in mind, performance worsened once passing the 2500kW mark. The most important finding is that the heat from the electrolyzer may be introduced into a CHP station -still maintaining the required forward temperature.</p>}},
author = {{Al-Soud, Mohammed Abu and Kayali, Fawzi and Hushmandi, Narmin and Genrup, Magnus}},
booktitle = {{37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2024}},
isbn = {{9798331307660}},
language = {{eng}},
pages = {{2341--2352}},
publisher = {{ECOS 2024}},
title = {{The effect of introducing waste heat from electrolyzers to a power plant in-between two district heating condensers}},
url = {{http://dx.doi.org/10.52202/077185-0201}},
doi = {{10.52202/077185-0201}},
year = {{2024}},
}