Alternative Analysis of Large Temperature Data for Adsorption Heat - PowerPoint PPT Presentation

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 Analysis • Results So Far • Going Ahead

Overview • Adsorption heat pumps • Physical adsorbents vs chemical adsorbents (salts) • Heat transfer and kinetics

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

Large Temperature Jump LTJ

Standard Analysis of LTJ Data • Single heat transfer parameter (we want to know more) • More suited to physical adsorbents rather than salts

Alternative Analysis of LTJ Data • New approach isolates the effects of conduction and contact resistance

Results So Far Run Thickness, t Density, ρ Thermal Heat transfer Root Mean (mm) (kg/mᵌ) conductivity,k coefficient, h Square Error (W/mK) (W/m²K) , 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

Results So Far

Results So Far

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