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Interactive process to control the evaporating temperature of refrigerant for solar adsorption cooling machine with new correlation

  • N. Cherrad
  • A. Benchabane
Original Paper

Abstract

An interactive numerical process has been proposed to control the evaporating temperature of refrigerant for solar adsorption cooling machine with new correlation for the case of activated carbon AC35-methanol as working pair. The study has given a possibility to define the interactive relation between the evaporating temperature of refrigerant in the evaporator and the predicted temperature at start of adsorption in the adsorber. This can allow automating of the system using a thermostat for controlling and the regulation of opening of check valve to pass the refrigerant from the evaporator towards the adsorber.

Keywords

Interactive process Correlation Refrigerant Evaporating temperature Temperature at start of adsorption Solar adsorption cooling machine 

List of symbols

A

Constant

B

Constant

D

Coefficient characterizing adsorbent–adsorbate pair

m

Adsorbate mass (kg)

\(\hbox {m}_{\mathrm{d}}\)

Adsorbent mass (kg)

\(\hbox {m}_{\mathrm{max}}\)

Maximal adsorbate mass (kg)

\(\hbox {m}_{\mathrm{min}}\)

Minimal adsorbate mass (kg)

n

Parameter of adjustment of Dubinin and Astakov equation

P

Equilibrium pressure of adsorbent–adsorbate pair (Pa)

\(\hbox {P}_{\mathrm{c}}\)

Condensing pressure of adsorbate (Pa)

\(\hbox {P}_{\mathrm{e}}\)

Evaporating pressure of adsorbate (Pa)

\(\hbox {P}_{\mathrm{s}}\)

Saturation pressure of adsorbate (Pa)

T

Temperature (K)

\(\hbox {T}_{\mathrm{a}}\)

Adsorption temperature (temperature at end of adsorption) (K)

\(\hbox {T}_{\mathrm{ad}}\)

Temperature at start of adsorption (K)

\(\hbox {T}_{\mathrm{c}}\)

Condensing temperature of refrigerant (K)

\(\hbox {T}_{\mathrm{d}}\)

Desorption temperature or temperature at start of desorption (K)

\(\hbox {T}_{\mathrm{e}}\)

Evaporating temperature of refrigerant (K)

\(\hbox {T}_{\mathrm{g}}\)

Generating temperature (temperature at end of desorption) (K)

\(\hbox {W}_{0}\)

Maximum adsorbed volume of adsorbate for 01 kg of adsorbent (\(\hbox {m}^{3}\)/kg)

\(\upvarepsilon \)

Relative error of convergence of computational algorithm

\(\uprho _{\mathrm{l}}\)

Density of the adsorbate in the liquid state (kg/\(\hbox {m}^{3}\))

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Copyright information

© Springer-Verlag France 2017

Authors and Affiliations

  1. 1.Université Kasdi Merbah de Ouargla, Faculté des Sciences Appliquées, Département de Génie MécaniqueOuarglaAlgeria
  2. 2.Laboratoire de Génie Energétique et Matériaux, LGEMUniversité de BiskraBiskraAlgeria

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