Solar wheel dehumidification system

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Exergy analysis of dehumidification systems: A comparison

Fig. 2 illustrates the desiccant wheel dehumidification system adopted in the present study. A heat exchanger (HE 6) is used to save the heat in heating the regeneration air and save the cold in cooling the process air. Comparative performance analysis of different solar desiccant dehumidification systems. Energy Build, 150 (2017), pp. 37

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Evaluation and optimization of solar desiccant wheel performance

A perforated plate solar air heater of 2 m 2 area, together with an electric heater, is used as a source of energy to regenerate the desiccant material. The experimental tests are used to validate the numerical model and to evaluate the performance of the solar system and the desiccant wheel under actual conditions of Cairo climate (30° latitude).

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Experimental investigation on the dehumidification

Findings are beneficial in favour of solar PTAC assisted dehumidification system. In areas of high humidity, moisture is a major problem for human comfort and air-conditioning

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Experimental study of dehumidification performance and solar

In order to avoid excessive cooling and reheating in conventional condensation dehumidification of air conditioning, desiccant coated heat exchanger (DCHE) has been proposed for high-efficiency dehumidification process [1].The structure of DCHE is described in Fig. 1 as well as the process air dehumidification and regeneration progress. The DCHE is a fin-tube

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Experimental investigation of desiccant dehumidification

Desiccant wheels also referred to as dehumidification wheels or sorption wheels, can regenerate their desiccant materials using a process called solar regeneration. In Heating, Ventilation, and Air Conditioning (HVAC) systems and other applications where dehumidification is crucial, a desiccant wheel is a crucial component [43, 44].

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Which Type of Desiccant Dehumidification Should You Use?

Dry desiccant humidification systems are good for mixed air systems and cold storage areas that require warmer air or supply-air dew points to be below 50°F. Desiccant wheel dehumidification is also good for dedicated outdoor food storage units, so the air within them is less humid. The Best Desiccant Dehumidification System

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Performance assessment of solar powered hybrid solid

In desiccant-assisted dehumidification system, processed room air first passes through desiccant-laden flutes provided in the rotary wheel. Moisture is driven off the room process air due to the vapor pressure difference between the hot desiccant and room process air. The water vapor is adsorbed by the desiccant surface due to its low vapor

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DESICCANT DEHUMIDIFICATION AND SOLAR THERMAL

dehumidification system (DEC) with conceptual visualization of system & working of silica gel as dehumidifier. Thermodynamic and chemical properties of desiccant material has been analysed with focus on regeneration of desiccant Compounding & designing of desiccant wheel. 2) Solar assisted cooling system for sensible cooling of air for

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Review on substrate of solid desiccant dehumidification system

The reviews on the type and running mode of rotary desiccant wheel dehumidification system driven by solar power and heat pump have been conducted systematically. Jani et al. [5] summarized the progress and variation in solid desiccant cooling system configuration. Many researchers have proposed heat pump assisted rotary desiccant

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Experimentally validated model for atmospheric water

Most of the required energy for the regeneration process of dehumidification wheel can be met by thermal gain of the solar hybrid PVT array during the day. The outlet processed air (dehumidified air stream) incurs a smaller latent load on a proposed small-scale air-conditioning system which can help to bring the humidity level inside the cabin

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Review of solar-powered desiccant cooling systems

By incorporating a solar desiccant dehumidification system in an HVAC system, 25–50% energy savings can be expected for various sensible load to latent load ratios. This work can be divided into two groups: separate solar rotary desiccant wheel cooling systems and hybrid systems. Within the first group, research can be subdivided based on

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Thermal performance analysis of a low-cost and eco-friendly

Rotary desiccant wheels have demonstrated substantial promise in energy-efficient dehumidification and climate control applications [7].These systems employ a continuously rotating wheel that is coated with a desiccant material, enabling efficient moisture adsorption from the air stream [8].As the wheel rotates, the absorbed moisture is expelled during the

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Thermodynamic performance assessment of a solar-driven

Solar water collectors can utilize the water tank to achieve heat storage, marking the SDEAC work more consistently. Lai et al. [7] proposed a SDEAC system, which utilized a solar water collector, water-air heat exchanger, and an auxiliary heater to regenerate the desiccant wheel the system, the fresh air was dehumidified by a desiccant wheel and then

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Review on solar powered rotary desiccant wheel cooling system

Rotary desiccant wheel cooling system operates on the principle of adsorption dehumidification and evaporative cooling. The system adopts natural substance as working

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Experimental Study on Solar Driven Dehumidification

In this paper, a desiccant coated heat exchanger (DCHE) system driven by solar energy is built and tested under winter condition. The purpose of this experimental research is

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Solid desiccant-based dehumidification systems: A critical review

Vapor compression refrigeration (VCR) is the conventional technique for cooling and dehumidification purposes. In this system, water vapor is removed by cooling the process moist air to a temperature below its dew point (Hu et al., 2015) (Coney et al., 1989).A high amount of electrical energy is typically consumed during this procedure (Jani et al., 2016), which also

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Review on solar powered rotary desiccant wheel cooling system

Based on the research of two-stage system, Ali et al. [26] further developed one-rotor six-section solar powered desiccant cooling system, in which one cross section of desiccant wheel was divided into six parts, two pre-cooling parts were added to cool desiccant wheel after regeneration process as shown in Fig. 8, and then dehumidification

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Experimental investigation and effectiveness analysis of a

The desiccant wheel system has been widely used as an alternative to the conventional cooling system for air dehumidification and conditioning in modern industries [8], [9], [10], [11].As the desiccant wheel rotates constantly across the process and regeneration air streams, the solid desiccant periodically adsorbs moisture from the process air and desorbs it

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Optimization and evaluation of a solar energy, heat

Desiccant wheel (DW) dehumidification system could adsorb water vapor of air without cooling. The main problem is that the energy consumed to regenerate DW due to a

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Performance evaluation of a hybrid solar powered rotary desiccant wheel

The results show that, the solar desiccant wheel air conditioning system should always be preferred to conventional air conditioning. And the maximum energy saving can reach 72%, when the solar energy excess is completely used for further energy demands. The principle of the rotary desiccant wheel system is dehumidification via adsorption

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Experimental analysis of a solar assisted desiccant-based space heating

Kashif et al. [29] analyzed a solar assisted desiccant wheel dehumidification system, and the results showed that an average humidification effectiveness of 0.74 and heating seasonal performance factor of 1.5 could be achieved by the system. Comino et al. [30] experimentally assessed the energy performance of a solar desiccant wheel system

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Experimental analysis of a solar assisted desiccant-based

Therefore, a heat wheel is used in the system to preheat the inlet ambient air on heating and humidification side. The process of air heat recovery from dehumidification side is presented from points 2–3. Comparative performance analysis of different solar desiccant dehumidification systems. Energy Build., 150 (2017), pp. 37-51. View PDF

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Desiccant Wheel

In Europe, of the 450 solar cooling systems installed, [13,31,82–87], the desiccant wheel is the core of the rotary desiccant wheel dehumidification system, which is driven by a motor and rotates slowly. However, the desiccant wheel has high requirements for the material property of the substrate, like suppleness, porosity, thermophysical

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A comprehensive review of low dew-point desiccant wheel system

Analyzed deep dehumidification systems from the viewpoints of energy efficiency, economics, and environmental impact. System: water source heat pump desiccant wheel system (HPDWS) Regenerator: solar collector and condenser: Hot water generated by solar collector and condenser was used to drive regeneration. In July,

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Rotary desiccant wheel systems: A review | Cüce | Turkish

Natural regeneration systems usually have solar air collectors. On the other hand, electrical regeneration systems use typical fossil fuel-powered heaters. Z. Ma, X. Liu, and T. Zhang, "Experimental investigation and effectiveness analysis of a desiccant wheel dehumidification system with low air humidity," Applied Thermal Engineering

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Performance analysis of a solar-driven rotating desiccant wheel

To address the high energy consumption of air-conditioning systems in Guangdong, this study contributes a model of a solar-driven rotary desiccant wheel air conditioning system using

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Optimization and evaluation of a solar energy, heat

mance of the solar energy DW systems mentioned above. To maintain the operation of the system at low solar radiation intensity, vapor compression systems (VCS) is combined with solar collector and DW together to form hybrid dehumidification and cooling systems (Hürdoğan et al. 2012; La et al. 2011; Cejudo López et al. 2013). In these systems

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Experimental Study on a Solar Powered Two-Stage Solid Wheel

A new formulation, that employs both two-stage dehumidification and intercooler to effectively enhance system performance is proposed and investigated experimentally. The paper briefly describes desiccant wheel including the coupled fundamental principle and overall structure originally. An experimental setup is subsequently designed and built to evaluate the system

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Experimental investigation on the dehumidification

The rotating wheel is, then, freed from the moisture by using another hot and dry air introduced to the dehumidification wheel (regeneration air). In the current study, a solar assisted dehumidification system was experimentally tested in a laboratory environment and its dehumidification performance under different inlet conditions were

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Effect of operating parameters of desiccant wheel on the

The solar air heater is based on both ends open evacuated tube collector, which is able to produce hot air at about 150°C at a mass flow rate of 143 kg/h. At this temperature the

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Evolution of solar driven desiccant systems for energy

Duration for regeneration with combined solar and electric system reduced by 24 −30 min compared to using only solar collector and was 18 – 28 min less than when the electric heating was used alone. Sleiman et al. [183] proposed a two-stage direct solar regeneration system for rotating belt dehumidification. The operational air flow rates

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Solar assisted CaCl 2 desiccant wheel rotor system for

Download Citation | Solar assisted CaCl 2 desiccant wheel rotor system for simultaneous cooling and dehumidification operation: experimental and modelling approach | High temperature and humidity

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Performance analysis of heating and humidification system with solar

Proposed CaCl 2-based desiccant wheel display wheel effectiveness in the range of 0.67–0.95 and 0.51–0.90 for regeneration and process section, respectively, which is very

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Assessment of Solar Dehumidification Systems

Solar thermal-powered desiccant dehumidification systems are attracting attention for cooling load-dominated climates. However, their performance varies substantially from place to place depending on climatic

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DESICCANT DEHUMIDIFICATION AND SOLAR THERMAL

Use of solar energy for cooling purposes can reduce load on conventional systems. This review research paper gives description of solid desiccant dehumidification

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Dehumidification Solutions for the 21st Century

the market for innovative dehumidification systems that balance indoor air quality (IAQ) and energy concerns. Through a partnership with DOE and the Florida Solar Energy Center, Trane developed the CDQ™ (Cool, Dry, Quiet) desiccant dehumidification system. This unique system places a desiccant wheel in series with a traditional DX or chilled

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Progressive Development and Challenges Faced

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

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Achieving deep dehumidification through a heat pump

Desiccant wheel systems achieve deep dehumidification with sub-zero dew points for various industrial needs, but the regeneration process using electric or steam heaters requires considerable energy input. solar energy, or industrial waste heat. Among these options, the system utilizing an electric heater for regeneration is the most

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About Solar wheel dehumidification system

About Solar wheel dehumidification system

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6 FAQs about [Solar wheel dehumidification system]

What is solar powered desiccant wheel evaporative cooling system (sdecs)?

Solar powered Desiccant wheel Evaporative Cooling System (SDECS) as shown in Fig. 1 is the widely adopted basic type of solar rotary desiccant wheel cooling system. This system is mainly consists of two subsystems: solar subsystem and desiccant cooling subsystem.

What is hybrid rotary desiccant wheel cooling system?

3. Solar powered hybrid rotary desiccant wheel cooling system Rotary desiccant wheel system has good capacity of handling latent load, and conventional VCS can effectively remove sensible load compared with evaporative cooling process. Therefore, there exist some investigations on hybrid solid desiccant cooling system.

What is rotary desiccant wheel air conditioning system?

Rotary desiccant wheel air conditioning system, which operates on the principle of adsorption dehumidification and evaporative cooling, becomes one of the good alternatives to conventional VC systems.

Is Solar Rotary desiccant wheel cooling system good?

Solar rotary desiccant wheel cooling system has good capacity of moisture removal, whereas the sensible cooling capacity is limited by evaporative cooling, and then performance of combing this system with conventional VCS ( Fig. 10) is investigated by researchers , , , , , , , , .

Why is cooling increased by dehumidification of air by desiccant?

cooling is increased due to the dehumidificati distraction of air by desiccant. Desiccants used can be either solid or liquid. Solid desiccant air co ditioning system which consists of fixed bed type & rotary wheel type desiccants. This wheel consists of a m

How is air dehumidification achieved?

temperature of air. Air dehumidification can be achieved by following methods :-COOLING BASED DEHUMIDIFICATION:- In cooling ased dehumidification cycle (VCRS) air is cooled below its dew point temperature. As a result water vapour ge

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