Adsorption Refrigeration Technologies

In this study, the hydrothermal method was used to synthesize MIL-101(Cr), and activated carbon (AC) with different content was incorporated in to MIL-101(Cr), thereby obtaining AC-MIL-101(Cr) composite material with a huge specific surface area. The physical properties of MIL-101(Cr) and AC-MIL-101(Cr) were characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), nitrogen adsorption and desorption and specific surface area testing, and ethanol vapor adsorption performance testing. The results show that with the increase of activated carbon content, the thermal stability of AC-MIL-101(Cr) is improved. Compared with the pure sample, the BET specific surface area and pore volume of AC-MIL-101(Cr) have increased; In the relative pressure range of 0–0.4, the saturated adsorption capacity of AC-MIL-101(Cr) to ethanol vapor decreases slightly. It is lower than MIL-101(Cr), but its adsorption rate is improved. Therefore, AC-MIL-101(Cr)/ethanol vapor has a good application prospect in adsorption refrigeration systems. The exploration of AC-MIL-101(Cr) composite materials in this paper provides a reference for the future application of carbon-based/MOFS composite adsorbent/ethanol vapor working fluid in adsorption refrigeration.

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Performance Study of Adsorption Refrigeration System with Composite Adsorbent

International Journal of Refrigeration ◽

10.1016/j.ijrefrig.2021.05.025 ◽

2021 ◽

Author(s):

Qiangqiang Xu ◽

Jianghong Wu ◽

Zhe Xu

Keyword(s):

Refrigeration System ◽

Performance Study ◽

Adsorption Refrigeration ◽

Composite Adsorbent

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New Experimental Installation to Determine Adsorptive Properties of Magnesium Sulphate

Materials ◽

10.3390/ma13245652 ◽

2020 ◽

Vol 13 (24) ◽

pp. 5652

Author(s):

Oscar Banos ◽

Sven Ohmann ◽

Cornelia Breitkopf

Keyword(s):

Thermal Management ◽

Heat Pumps ◽

Critical Factors ◽

Adsorption Refrigeration ◽

Two Factors ◽

Adsorption Processes ◽

Material Separation ◽

Adsorption Desorption ◽

Adsorptive Properties ◽

Desorption Capacity

Adsorption processes are of great interest in catalysis, material separation, and thermal management. In recent decades, adsorbents have been further investigated because of their applications in adsorption refrigeration, heat pumps, and thermal energy storage. Thus, there is an increasing need to determine the macroscopic properties of the adsorbent, specifically their adsorption/desorption capacity and speed, because these two factors determine the power and size of the corresponding adsorber. Many designs have been proposed, but there is still not a generally adopted technology for the analysis of those properties. In this paper, a novel instrument is described, which is capable of determining the macrokinetic properties of an adsorbent composite, with better control and higher accuracy than gravimetric, volumetric, or barometric installations, and lower price and complexity than spectroscopic installations. The design of the installation is detailed, highlighting the main challenges and critical factors. The two working modes of the installation are described, and one example is provided and analyzed for each of them.

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Feasibility Study of Solar Adsorption Technologies for Automobile Air-Conditioning

Solar Energy ◽

10.1115/isec2005-76064 ◽

2005 ◽

Author(s):

M. O. Abdullah ◽

S. L. Leo

Keyword(s):

Feasibility Study ◽

Ozone Depletion ◽

Air Conditioning ◽

Waste Heat ◽

Environmentally Benign ◽

Adsorption System ◽

Adsorption Refrigeration ◽

Adsorption Technology ◽

Cooling Loads ◽

Automobile Air Conditioning

An adsorption system driven by solar heat or waste heat can help to eliminate the use of ozone depletion substances, such as chlorofluorocarbons (CFCs) and hydro-chlorofluorocarbons (HCFCs). In recent years, adsorption system has witnessed an increasing interest in many fields due to the fact that this system is quiet, long lasting, cheap to maintain and environmentally benign. Although adsorption system is not commonly used for automobile air conditioning, adsorption-cooled mini-refrigerators have been marketed for recreational transports (motor homes, boats, etc). Hence, there exists a need for a creative design and innovation to allow adsorption technology to be practical for air conditioning in automobile. The objective of this paper is to present a comprehensive review on the past efforts in the field of solar adsorption refrigeration systems and also the feasibility study of this technology for automobile airconditioning purpose. It is a particularly an attractive application for solar energy because of the near coincidence of peak cooling loads with the available of solar power.

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