Thermal performance of a novel air conditioning system using a liquid desiccant

Oliveira, Armando C.; Afonso, Clito; Riffat, Saffa; Doherty, P. S.

doi:10.1016/s1359-4311(99)00087-3

Cited by 46 publications

(20 citation statements)

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“…The fan could perform the function of the absorber (or evaporator) by feeding the fibres with a desiccant solution (or water) [73]. Oliveira et.al [74] studied the system experimentally, and developed a model for characterizing its performance in different system parameters.…”

Section: Other Novel Systemsmentioning

confidence: 99%

Solar pond powered liquid desiccant evaporative cooling

Elsarrag

Igobo

Alhorr

et al. 2016

Renewable and Sustainable Energy Reviews

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Liquid desiccant cooling systems (LDCS) are energy efficient means of providing cooling, especially when powered by low-grade thermal sources. In this paper, the underlying principles of operation of desiccant cooling systems are examined, and the main components (dehumidifier, evaporative cooler and regenerator) of the LDCS are reviewed. The evaporative cooler can take the form of direct, indirect or semi-indirect. Relative to the direct type, the indirect type is generally less effective. Nonetheless, a certain variant of the indirect type -namely dew-point evaporative cooler -is found to be the most effective amongst all. The dehumidifier and the regenerator can be of the same type of equipment: packed tower and falling film are popular choices, especially when fitted with an internal heat exchanger. The energy requirement of the regenerator can be supplied from solar thermal collectors, of which a solar pond is an interesting option especially when a large scale or storage capability is desired.

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Section: Other Novel Systemsmentioning

confidence: 99%

Solar pond powered liquid desiccant evaporative cooling

Elsarrag

Igobo

Alhorr

et al. 2016

Renewable and Sustainable Energy Reviews

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“…The desiccant requires obviously regeneration to return to the initial conditions: this is achieved heating the solution to a suitable temperature. This process represents the energy requirement to drive the system (Ryan et al, 1992;Kessling et al, 1999;Oliveira et al, 2000;Slayzak et al, 1998).…”

Section: Principlesmentioning

confidence: 99%

Investigation of an open cycle liquid desiccant system for the air conditioning of an university building

Lazzarin

D'Ascanio

2007

Int. J. Energy Res.

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The paper reports on the experimental results recorded in a liquid desiccant system for the air conditioning of an university building. The plant is composed by a desiccant column to treat the exhausted air fed by a solution H2O–LiBr, operating both in winter and in summer mode. In winter the system operates an effective heat recovery on the exhaust air; in summer the plant dehumidifies the ambient air to face the latent load

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“…K. Daou et al [10] reviewed on desiccant air conditioning systems and revealed the feasibility of them in various climatic conditions to prove the benefits offered by them in terms of cost and energy savings. Armando et al [11] conducted research on novel approach to liquid desiccant assisted cooling for humid environments showing that similar systems have potential to compete with conventional air conditioning units while also being more cost effective and efficient. Li Zhang et al [12] did general research on a hybrid air cooling system using a liquid desiccant.…”

Section: Introductionmentioning

confidence: 99%

Solar assisted liquid desiccant cooling using clay based membranes

et al. 2018

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Abstract. The environmental concerns have led to the urge of the usage of non-conventional energy resources like solar, wind, thermal, geothermal etc. which provide enormous source of energy without causing any further diminution of the environment. Instead of the conventional HVAC systems that cause colossal environmental perils, usage of liquid desiccants in coming in vogue whereby reducing ecological threats. Moreover, solar assisted systems provide further impulse to such systems. This paper discusses about the various comparisons between liquid desiccants: Lithium chloride, Potassium formate and Calcium chloride and concludes that potassium formate is the best desiccant to be used among the three. Potassium formate (HCOOK) is used which is cheaper and less corrosive as compared to the other aqueous salts, and has a negative crystallization temperature. Potassium formate is a new liquid desiccant and thus, not much research is available currently. The weather conditions of Manipal provide an appropriate condition for the experimentations of solar aided liquid desiccant evaporative cooling systems due to its humid climate and intense solar radiation obtained. The small scale experimentation also encounters the problem of liquid desiccant carryover by the air flow, with the help of clay based membranes which are again cheap, environmentally benign and obtained in a facile way. The projected system takes complete advantage of pure solar energy aimed at the regeneration of liquid desiccant.

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Thermal performance of a novel air conditioning system using a liquid desiccant

Cited by 46 publications

References 1 publication

Solar pond powered liquid desiccant evaporative cooling

Solar pond powered liquid desiccant evaporative cooling

Investigation of an open cycle liquid desiccant system for the air conditioning of an university building

Solar assisted liquid desiccant cooling using clay based membranes

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