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Aug 25, 2022 136 likes •264 views

Alternative Analysis of Large Temperature Data for Adsorption Heat Pumps Yemi Jegede School of Engineering, University of Warwick Content Overview Large Temperature Jump (LTJ) Experiments Standard LTJ Analysis Alternative LTJ

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Alternative Analysis of Large Temperature Data for Adsorption Heat Pumps

Yemi Jegede School of Engineering, University of Warwick

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Content

Overview
Large Temperature Jump (LTJ)

Experiments

Standard LTJ Analysis
Alternative LTJ Analysis
Results So Far
Going Ahead

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Overview

Adsorption heat pumps
Physical adsorbents vs chemical

adsorbents (salts)

Heat transfer and kinetics

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Large Temperature Jump

Used to study adsorbents under conditions

similar to isobaric stages of an adsorption cycle

Adsorbent is given a temperature jump

and this initiates sorption

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Large Temperature Jump LTJ

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Standard Analysis of LTJ Data

Single heat transfer parameter (we want to

know more)

More suited to physical adsorbents rather

than salts

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Alternative Analysis of LTJ Data

New approach isolates the effects of

conduction and contact resistance

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Results So Far

Run Thickness, t (mm) Density, ρ (kg/mᵌ) Thermal conductivity,k (W/mK) Heat transfer coefficient, h (W/m²K) Root Mean Square Error , RMSE(bar) 1 1.5 530 0.20 200 0.0020 2 8.5 560 0.20 250 0.0063 3 5.2 650 0.35 450 0.0101 4 4.8 705 0.40 400 0.0087

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Results So Far

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Results So Far

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Going Ahead

Extend technique to chemical adsorbents (salts)
Introduction of kinetic parameters
Design heat pumps using cascaded salts