Advanced solar assisted desiccant and evaporative cooling system equipped with wet heat exchangers

Finocchiaro, Pietro; Beccali, Marco; Nocke, Bettina

doi:10.1016/j.solener.2011.11.003

Cited by 63 publications

(14 citation statements)

References 7 publications

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“…Finocchiaro et al [75] observed that because of the limited cooling capacity of the return air in a desiccant cooling system, the obtained outlet temperature was hardly lower than 26 • C. So, to avoid this problem, a packed wet heat exchanger was used as a replacement for the sensible heat exchanger for removal of more sensible load. An experimental setup was developed for studying the detailed performance of the proposed hybrid SADDCS.…”

Section: Recent Advancements In the Field Of Desiccant Cooling Systemsmentioning

confidence: 99%

Progressive Development and Challenges Faced by Solar Rotary Desiccant-Based Air-Conditioning Systems: A Review

Singh

Das

2021

Processes

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A rotary desiccant-based air-conditioning system is a heat-driven hybrid system which combines different technologies such as desiccant dehumidification, evaporative cooling, refrigeration, and regeneration. This system has an opportunity to utilize low-grade thermal energy obtained from the sun or other sources. In this paper, the basic principles and recent research developments related to rotary desiccant-based cooling systems are recalled and their applications and importance are summarized. It is shown that with novel system configurations and new desiccant materials, there is great potential for improving the performance and consistency of rotary desiccant systems; at the same time, the use of solar energy for regeneration purposes can minimize the operating cost to a great extent. Some examples are presented to demonstrate how rotary desiccant air conditioning can be a promising solution for replacing traditional vapor-compression air-conditioning systems. Recent advances and ongoing research related to solar-powered hybrid rotary desiccant cooling systems are also summarized. The hybrid systems make use of a vapor-compression system in order to have better operational flexibility. These systems, although they consume electrical energy, use solar energy as the principal source of energy, and hence, significant savings of premium energy can be obtained compared to conventional vapor-compression systems. However, further research and development are required in order to realize the sustainable operation of solar rotary desiccant air-conditioning systems, as solar energy is not steady. Reductions in capital cost and size, along with improvements in efficiency and reliability of the system is still needed for it to become a player in the market of air conditioning.

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Section: Recent Advancements In the Field Of Desiccant Cooling Systemsmentioning

confidence: 99%

Progressive Development and Challenges Faced by Solar Rotary Desiccant-Based Air-Conditioning Systems: A Review

Singh

Das

2021

Processes

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“…So kann bspw. die Adsorption isotherm geführt werden oder Wärme aus dem entfeuchteten Luftstrom genutzt werden, um die Abluft für die Regeneration des Adsorbens vorzuheizen .…”

Section: Stand Der Forschungunclassified

Adsorbents for Dehumidification, Cooling, and Water Harvesting

Ernst

Baumgartner

Fröhlich

et al. 2017

Chemie Ingenieur Technik

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Wasseradsorption an porösen Materialien bietet Möglichkeiten, das gesteigerte Komfortbedürfnis der Menschheit zu adressieren: Sorptionsgestützte Klimatisierung, Entfeuchtung und Wassergewinnung aus der Umgebungsluft. In vorliegender Arbeit werden drei neuartige Adsorbentien, die zwei MOFs Aluminium-Fumarat und CAU-10-H, sowie ein PMO mit Blick auf die Anwendung charakterisiert. Die maximale Wasserbeladung der Materialien liegt zwischen 0,35 und 0,52 g g -1 .Für verschiedene Anwendungen wurde der Umsatz berechnet und in einem Eigenaufbau die Stabilität der Materialien über 300 Zyklen untersucht.Water adsorption on porous materials offers opportunities to address the increased comfort needs of mankind: sorptionassisted air-conditioning, dehumidification, and water extraction from ambient air. In the present work, three novel adsorbents, two MOFs aluminum fumarate and CAU-10-H, as well as a PMO with regard to the application are characterized. The maximum water loading of the materials is between 0.35 and 0.52 g g -1 . The water exchange was calculated for various applications and the stability of the materials was investigated in a self-assembled test setup over 300 cycles.Abbildung 7. Darstellung der Adsorptionsenthalpien fü r die betrachteten Materialien. Berechnet aus dem wDSL-Ansatz (durchgezogene bzw. gepunktete Linien) und nach Dubinin-Astakhov (gestrichelte Linien).Abbildung 8. Wä hrend der Zyklierung maximal erreichte Beladung der Adsorbentien aufgetragen ü ber der Zyklenzahl.

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“…Typical mean values of the previous configurations ranged from 2 to 2.9 [19]. Due to the increased cooling performances, the electrical COP of the system, built by Finocchiaro [9], was clearly improved reaching 4.6. The mean value of the current thermal COP ranges from 1.3 to 1.6, while in a previous study [7], the value recorded 0.75, and in another one, the value reached 1.8 [9].…”

Section: Coefficient Of Performance Copmentioning

confidence: 99%

“…Due to the increased cooling performances, the electrical COP of the system, built by Finocchiaro [9], was clearly improved reaching 4.6. The mean value of the current thermal COP ranges from 1.3 to 1.6, while in a previous study [7], the value recorded 0.75, and in another one, the value reached 1.8 [9]. Figure 5 shows a comparison of the system energy consumptions of the LDACS and the package conventional system under the condition of operating the system for 8 hours.…”

Section: Coefficient Of Performance Copmentioning

confidence: 99%

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Performance Evaluation of an Incorporation of a Compact Liquid Desiccant System Into an Evaporative Cooling-Assisted 100% Outdoor Air System

Mohamed¹

2015

IJRET

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The primary goal of this paper is to suggest incorporation of a compact liquid desiccant system into an evaporative coolingassisted 100% outdoor air system as an alternative proposal to the traditional vapor compression refrigeration system, especially with small loads, as well as to counteract the variation of climates. Current study presents an experimental analysis for building air conditioning system with using a LiCl aqueous solution as a liquid desiccant. Four air flow rate values are used for obtaining variable values of cooling capacity. Thermal and electrical COP is adopted to evaluate the system performance. The proposed system has the ability to improve indoor air quality, energy saving and environmental protection.

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Advanced solar assisted desiccant and evaporative cooling system equipped with wet heat exchangers

Cited by 63 publications

References 7 publications

Progressive Development and Challenges Faced by Solar Rotary Desiccant-Based Air-Conditioning Systems: A Review

Progressive Development and Challenges Faced by Solar Rotary Desiccant-Based Air-Conditioning Systems: A Review

Adsorbents for Dehumidification, Cooling, and Water Harvesting

Performance Evaluation of an Incorporation of a Compact Liquid Desiccant System Into an Evaporative Cooling-Assisted 100% Outdoor Air System

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