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Walmsley, T.G. Klemeš, J.J. Walmsley, M.R.W. Atkins, M.J. Varbanov, P.S.
Original Title
Innovative Hybrid Heat Pump for Dryer Process Integration
Type
conference paper
Language
English
Original Abstract
This study aims to simulate and optimise a hybrid compression-absorption heat pump process for convective dryers considering Pinch design principles. With a greening electricity grid, heat pumps represent an effective technology to reduce process heat emissions. As a result, numerous types of heat pumps integrated with convective dryers have been reported in the literature, but no study was found to use a hybrid heat pump. To simplify the design and optimisation, Process Integration principles for compressors and expanders from literature are synthesised into a Pinch design method for heat pumps. A milk spray dryer case study is analysed. Simulation results using Petro-Sim™ show that the optimally design hybrid heat pump system can reduce dryer energy demand by 47.3 % and total emissions by 42.4 % (assuming a low carbon electricity grid) while achieving a gross Coefficient of Performance of 4.53. Future work will look at optimising the selection and composition of working fluid for the hybrid heat pump system as well as investigating the economics of its implementation in industry
Keywords
Carbon; Dryers (equipment); Electric power transmission networks; Heat convection; Coefficient of Performance; Compression-absorption; Convective dryers; Design Principles; Electricity grids; Low-carbon electricities; Process integration; Total emissions; Heat pump systems
Authors
Walmsley, T.G.; Klemeš, J.J.; Walmsley, M.R.W.; Atkins, M.J.; Varbanov, P.S.
Released
1. 6. 2017
Publisher
Italian Association of Chemical Engineering - AIDIC
ISBN
978-88-95608-51-8
Book
Chemical Engineering Transactions
2283-9216
Periodical
Number
57
State
Republic of Italy
Pages from
1039
Pages to
1044
Pages count
5
BibTex
@inproceedings{BUT145948, author="Walmsley, T.G. and Klemeš, J.J. and Walmsley, M.R.W. and Atkins, M.J. and Varbanov, P.S.", title="Innovative Hybrid Heat Pump for Dryer Process Integration", booktitle="Chemical Engineering Transactions", year="2017", journal="Chemical Engineering Transactions", number="57", pages="1039--1044", publisher="Italian Association of Chemical Engineering - AIDIC", doi="10.3303/CET1757174", isbn="978-88-95608-51-8", issn="2283-9216" }