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

Rafique, M. Mujahid; Gandhidasan, P.; Al‐Hadhrami, Luai M.; Rehman, Shafiqur

doi:10.7763/jocet.2016.v4.257

Cited by 28 publications

(9 citation statements)

References 13 publications

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“…COP for a desiccant cooling system varies between 0.25 and 0.8 and L/G ratio is found effective parameter to consider for LDCS. As per Rafique et al (2016) Desiccant cooling is one of the alternatives to conventional air conditioning systems which can solve many problems related to air conditioning. Energy and exergy analysis were done using a theoretical model of the desiccant cooling system and conveyed that rotary desiccant wheel and solar collector are the main reason of exergy destruction because of the irreversibility available.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of evacuated tube type solar air heater with parabolic trough type collector

Pandey

Mishra

Sharma

et al. 2021

Int J Energ Water Res

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Solar energy is a most promising resource of non-conventional energy to utilize for heating. Based on the application there are two kinds of utilization one is water heating and the second one is air heating. This is generally done by flat plate solar collector but due to its limitations to use in higher temperature ranges (i.e., 70-95 °C) and poor performance led to introduce the application of evacuated tube and parabolic trough collector. To fabricate the solar air heater, one ended evacuated tube is used as a receiver of the parabolic trough and U-tube copper pipe is inserted within the evacuated tube. The air heating process is done at various mass flow rates and it was found that the average outlet temperature was more at the minimum mass flow rate, but the average efficiency was less. At maximum mass flow rate, the average outlet temperature was minimum, and the average thermal efficiency was maximum. The maximum thermal efficiency obtained was 24.1% at the 0.0082 kg/s mass flow rate and the maximum temperature that was obtained was 151 °C at 0.0062 kg/s mass flow rate. Hot air being used for different application in space heating, food processing, fruits and vegetable drying and in regeneration of desiccant.

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Section: Introductionmentioning

confidence: 99%

Performance analysis of evacuated tube type solar air heater with parabolic trough type collector

Pandey

Mishra

Sharma

et al. 2021

Int J Energ Water Res

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“…Among these technologies, desiccant cooling is the main focus of many researchers for past few years. Several studies describe the basic operation of desiccant cooling system . It has been proved that desiccant system has several advantages over vapor compression air conditioning systems .…”

Section: Introductionmentioning

confidence: 99%

Thermal and exergetic performance evaluation of an absorption type desiccant dehumidifier

Rafique

Gandhidasan

Shakir

2017

Env Prog and Sustain Energy

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In this article, a mathematical model for rotary‐shaped liquid desiccant dehumidifier has been developed for its parametric and feasibility analysis. The dehumidifier has a cylindrical shape with a number of circular channels, distributed uniformly over the rotor cross section. This type of dehumidifier is commonly known as desiccant wheel. The energy and exergetic performance of the dehumidifier has been discussed under different operating conditions. The performance curves which help to optimize the performance of the dehumidifier are drawn for a wide range of rotational speeds (0.5–7 rpm), wheel width (0.1–0.6 m), air mass flux (1–8 kg/m2.s), and regeneration temperature (50–90°C). A reduction of about 25% in humidity ratio is observed with an increase in the wheel width from 0.1 to 0.2 m. Furthermore, a feasibility analysis of the proposed dehumidification system has been presented for climatic conditions of Dhahran. The computed results show that better supply air conditions can be obtained to provide human comfort in the hot and humid climate with effectiveness of the system largely dependent on air flow rate, wheel width, and humidity ratio of the process air. The annual average value of dehumidification performance is found to be 0.55 which shows that system can control the latent load efficiently throughout the year. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1411–1423, 2018

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“…Several studies describe the basic operation of desiccant cooling system. System with rotary dehumidifier commonly known as desiccant wheel are most widely used and studied [2,3]. Although, absorption chillers are used in European market as solar cooling systems but trend is now changing towards desiccant cooling technology.…”

Section: Introductionmentioning

confidence: 99%

A Mathematical Model for Predicting the Performance of Liquid Desiccant Wheel

2017

(IJTEE)

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The liquid desiccant cooling system is found to be a good alternative of conventional air conditioning system for better control of both latent and sensible loads. The major component of a liquid desiccant cooling system is desiccant dehumidifier which controls the latent cooling load. In this paper a mathematical model for rotary type liquid desiccant dehumidifier commonly known as desiccant wheel has been presented. The desiccant wheel has a cylindrical shape with a number of identical narrow circular slots distributed uniformly over the rotor cross section. The slots are filled with a porous medium carrying the solution of liquid desiccant, to make the absorbing surface. The absorption and regeneration performance of the desiccant dehumidifier is discussed in this paper for different operating conditions. The wheel performance curves which help to determine the air outlet conditions and coefficient of performance (COP) of the system are drawn for a wide range of wheel thickness (0.06-0.6m), air mass flux (1-8 kg/m2 .s), and regeneration temperature (60- 85o C). A reduction of about 30% in outlet humidity ratio is observed with an increase in the wheel thickness from 0.06 to 0.2m. The computed results show that better supply air conditions can be obtained to provide human thermal comfort in the hot and humid climate with effectiveness of the system largely dependent on air flow rate, wheel thickness and humidity ratio of process air.

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

Cited by 28 publications

References 13 publications

Performance analysis of evacuated tube type solar air heater with parabolic trough type collector

Performance analysis of evacuated tube type solar air heater with parabolic trough type collector

Thermal and exergetic performance evaluation of an absorption type desiccant dehumidifier

A Mathematical Model for Predicting the Performance of Liquid Desiccant Wheel

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