%0 Journal Article
%A Engelpracht, Mirko
%A Gibelhaus, Andrej
%A Seiler, Jan
%A Graf, Stefan
%A Nasruddin, Nasruddin
%A Bardow, André
%T Upgrading Waste Heat from 90 to 110 °C: The Potential of Adsorption Heat Transformation
%J Energy technology
%V 9
%N 1
%@ 2194-4296
%C Weinheim [u.a.]
%I Wiley-VCH
%M FZJ-2021-00530
%P 2000643 -
%D 2021
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000587355800001
%R 10.1002/ente.202000643
%U https://juser.fz-juelich.de/record/889922