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Design of a resorption transformer to upgrade industrial waste heat
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Hinmers, Samuel John (2022) Design of a resorption transformer to upgrade industrial waste heat. PhD thesis, University of Warwick.
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Official URL: http://webcat.warwick.ac.uk/record=b3847701
Abstract
A design for a 3 kW resorption thermal transformer reactor has been presented. The design uses the pair calcium chloride and manganese chloride salts with ammonia as the refrigerant, using the same internal geometry in both reactors. The reactor design was informed by extensive experimental testing of the two salts mentioned and barium chloride, which were identified as principal salts to test. Testing was comprised of Large Temperature Jump (LTJ) testing using a specially designed reactor. The experimental apparatus was further developed to observe key reaction data. This has enabled a methodology to be presented for analysing new salts reacting with ammonia for the development of resorption reactor design. The LTJ testing observed the evolution of the reaction, and enabled the equilibrium data to be recorded, and observed phenomena in the salts that appeared as a metastate (or metastable state). One further development was the ‘shell-side’ LTJ reactor, this enabled empirical data for adsorbent material analogous in scale and geometry to a working resorption machine to be documented. The shell-side reactor was further modified to record Isosteric Temperature Change (ITC) data, which enabled accurate heats of reaction to be recorded. The experimental data enabled a design to be produced considering the Coefficient of Performance (COP) and the power density. This identified the importance of considerations into the heat transfer resistance and hysteresis. The 3 kW design presented could have a COP in the range of 0.4 with heat recovery processes applied. The system is designed at an expected power density of 1.4 kW/litre. The calcium chloride reactor overall length is 605 mm with a diameter of 114 mm, and hosts seven tubes with 16 mm A/F hexagonal forms of the composite adsorbent. The hexagonal forms were tested in the LTJ and performed well.
Item Type: | Thesis (PhD) | ||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
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Library of Congress Subject Headings (LCSH): | Heat recovery, Waste heat, Heat -- Transmission, Absorption, Chemisorption, System design, Chlorides -- Absorption and adsorption, Ammonia -- Absorption and adsorption, Refrigerants | ||||
Official Date: | March 2022 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | School of Engineering | ||||
Thesis Type: | PhD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Critoph, Robert E. | ||||
Sponsors: | Engineering and Physical Sciences Research Council ; Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek | ||||
Format of File: | |||||
Extent: | xv, 184 leaves : colour illustrations, charts | ||||
Language: | eng |
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