TY  - JOUR
AU  - Engelpracht, Mirko
AU  - Gibelhaus, Andrej
AU  - Seiler, Jan
AU  - Graf, Stefan
AU  - Nasruddin, Nasruddin
AU  - Bardow, André
TI  - Upgrading Waste Heat from 90 to 110 °C: The Potential of Adsorption Heat Transformation
JO  - Energy technology
VL  - 9
IS  - 1
SN  - 2194-4296
CY  - Weinheim [u.a.]
PB  - Wiley-VCH
M1  - FZJ-2021-00530
SP  - 2000643 -
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000587355800001
DO  - DOI:10.1002/ente.202000643
UR  - https://juser.fz-juelich.de/record/889922
ER  -