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Chemical Heat Pump Based on Hemiaminal Reversible Reactions

Su, Xin (2017) Chemical Heat Pump Based on Hemiaminal Reversible Reactions. Master's Thesis, University of Pittsburgh. (Unpublished)

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Heat pumps are widely used in different fields, such as the petroleum and chemical industries,
brewery, printing, etc. Traditional heat pump based on lithium bromide-water or ammonia-water
as refrigerant and absorber waste a lot of energy while using it to absorb heat from the environment.
The low efficiency of traditional heat pump is an obstacle for development. In recent years,
chemical heat pumps based on reversible chemical reactions were introduced, which can improve
the efficiency and have a great potential. The hemiaminal reaction, which is one of the chemical
reactions, can be potentially used in chemical heat pump based on reversible chemical reactions.
In this paper, simulations of hemiaminal reactions and simulated process design of heat pump
based on hemiaminal reaction is discussed. Two ways were used to calculate the equilibrium
constant of hemiaminal reaction: 1) density functional theory(DFT) and 2) neural network (NN).
And based on the simulated equilibrium constant, the whole process was simulated in Aspen Plus
and simulation result shows the new chemical heat pump system can get a coefficient of
performance (COP) more than 2.5, which is higher than the literature results of other kind of
chemical heat pump (between 1.0 to 2.4 [17]). There is a great possibility that, in the future, this
kind of chemical heat pump will be widely used in different fields.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Su, Xinxis49@pitt.eduxis49
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairBeckman,
Committee MemberMcKone,
Committee MemberEnick,
Date: 25 September 2017
Date Type: Publication
Defense Date: 3 May 2017
Approval Date: 25 September 2017
Submission Date: 8 May 2017
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 93
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Chemical Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: hemiaminal
Date Deposited: 25 Sep 2017 19:25
Last Modified: 25 Sep 2017 19:25


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