Experiments on a silica gel rotary dehumidifier

Krishna, Sri; Murthy, S. Srinivasa

doi:10.1016/0890-4332(89)90150-6

Cited by 23 publications

(9 citation statements)

References 1 publication

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“…Most of the time, the adsorbent is a silicagel or a product derived from silicagel. Many works are dedicated to experimental approaches of these cycles (Krishna and Murthy, 1989;Kodama et al, 1993Kodama et al, , 1994Kodama et al, , 1995 or numerical approaches, especially models of the desiccant wheel itself (Van den Bulck et al, 1985a, b;Farooq and Ruthven, 1991). They often deal with optimization of operating conditions (rotation speed, air #ow rate, regeneration temperature, etc.).…”

Section: Introductionmentioning

confidence: 99%

“…This remark leads to the second point: this technique, that e$ciently supplies altogether air-conditioning and ventilation, is quite healthy because the external air blown through the adsorbent wheel is meanwhile disinfected (Kovak et al, 1997). Third, the thermodynamic e$ciency is good (Collier et al, 1982;Van den Bulck et al, 1986;Krishna and Murthy, 1989;Waugaman et al, 1993;Kodama et al, 1995;Kuma et al, 1998). For instance, low-grade heat at about 803C can easily be used, which should permit to implement a rotary adsorbent airconditioner into a combined cold and power installation.…”

Section: Introductionmentioning

confidence: 99%

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Entropic analysis of adsorption open cycles for air conditioning. Part 1: first and second law analyses

Pons

Kodama

2000

Int. J. Energy Res.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Entropic analysis of adsorption open cycles for air conditioning. Part 1: first and second law analyses

Pons

Kodama

2000

Int. J. Energy Res.

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“…Extensive experimental research has been reported [24][25][26][27][28][29][30][31], and in many cases laboratory studies were performed mainly to validate numerical results [32][33][34][35]. However, rigorous characterization of the experimental devices seems to be difficult, and some doubts remain about the accuracy of the measured data.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Simplifying Assumptions for the Numerical Modeling of the Heat and Mass Transfer in a Porous Desiccant Medium

Ruivo

Costa

Figueiredo

2006

Numerical Heat Transfer, Part A: Applications

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The aim of this work is to assess the accuracy of different simplifying assumptions commonly adopted in the modeling of the thermodynamic behavior of porous desiccant media such as those composing the channel walls of compact heat and mass exchangers, such as desiccant wheels. The study is based on the one-dimensional numerical solution of the conservation equations for heat, water vapor, and adsorbed water inside the porous medium under the constraint of local equilibrium between the two phases, which is characterized by sorption isotherms without hysteresis. Systematic calculations are performed for both adsorption and desorption processes and particular air flow conditions. It is concluded that the surface diffusion is the most important mechanism of water transport within the porous medium and that the internal thermal resistance may be locally neglected, allowing a lumped heat capacitance model in the cross direction of the channel wall. Furthermore, it is also important to account for the local variation of some properties of the porous medium.

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“…desiccant dehumidifier and others dealt with the whole system [1], [2]. Krishna and Murthy [3] and Jain et al [4] investigated the performance of open cycle desiccant cooling system. Mavroudaki et al [5] conducted a feasible study of desiccant cooling system for conditions of Europe and United States of America.…”

Section: Introductionmentioning

confidence: 99%

Energy, Exergy and Anergy Analysis of a Solar Desiccant Cooling System

Rafique¹,

Gandhidasan²,

Al‐Hadhrami³

et al. 2015

JOCET

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Abstract-Some alternative and cost effective approaches are needed for space cooling of buildings in order to resolve environmental and economic issues. Desiccant cooling is one of the alternative to conventional air conditioning systems which can solve many problems related to air conditioning. In this paper a method is developed for energy, exergy and anergy analysis of the desiccant cooling system operating on ventilation cycle. Both exergy and energy analysis are usually applied in parallel in order to find the rational use of energy and to determine the individual performances of each component. The transport of exergy between the system components and destructions of exergy accompanied with each component of the system are determined using average parameters calculated from theoretical analysis. The effect of ratio between regeneration to process air flow rate and temperature of regeneration on system performance has been studied too. The results shows that desiccant wheel and solar collector shares the major part of the exergy destruction (about 65%). The upper theoretical limit of system performance can be determined by carrying both exergy and energy analysis which cannot be determined by carrying energy analysis alone. The analysis shows the direction for exergy destruction/anergy minimization by identifying and quantifying the sites with exergy losses.

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Experiments on a silica gel rotary dehumidifier

Cited by 23 publications

References 1 publication

Entropic analysis of adsorption open cycles for air conditioning. Part 1: first and second law analyses

Entropic analysis of adsorption open cycles for air conditioning. Part 1: first and second law analyses

Analysis of Simplifying Assumptions for the Numerical Modeling of the Heat and Mass Transfer in a Porous Desiccant Medium

Energy, Exergy and Anergy Analysis of a Solar Desiccant Cooling System

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