Journal Article

FZJ-2021-00530

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Upgrading Waste Heat from 90 to 110 °C: The Potential of Adsorption Heat Transformation

Engelpracht, M. ; Gibelhaus, A.RWTH* ; Seiler, J.RWTH* ; Graf, S.RWTH* ; Nasruddin, N. ; Bardow, A. (Corresponding author)FZJ*RWTH*

2021
Wiley-VCH Weinheim [u.a.]

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/26885  doi:10.1002/ente.202000643

Abstract: Low‐grade heat is abundantly available below 100 °C, whereas industry mainly needs heat above 100 °C. Thus, the industry cannot directly utilize low‐grade heat to save primary energy and emissions. Low‐grade heat can be utilized by adsorption heat transformers (AdHTs); however, closed AdHTs to upgrade heat above 100 °C are only investigated by idealized steady‐state analyses, which indicate the maximal theoretical performance. For evaluating the performance achievable in practice, this work studies a closed AdHT in a one‐bed configuration using dynamic simulation. For the working pair AQSOA‐Z02/H2O, the performance is optimized via the design of the adsorber heat exchanger and the control of the AdHT cycle. When heat is upgraded from 90 to 110 °C, releasing waste heat at 35 °C, the maximum exergetic coefficient of performance (COPexergetic) is 0.64, and the maximum specific heating power (SHP) is 590 W kg−1. The maximum SHP can increase by 35% when releasing waste heat at 25 °C. Both performance indicators strongly depend on design, control, and the available temperature of the waste heat. Overall, AdHTs with optimized design and control are promising to utilize low‐grade waste heat.

---

Contributing Institute(s):

1. Modellierung von Energiesystemen (IEK-10)

Research Program(s):

1. 1121 - Digitalization and Systems Technology for Flexibility Solutions (POF4-112) (POF4-112)

Appears in the scientific report 2021

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; DEAL Wiley ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---