Adsorption heat pumps

Whilst the above analysis is detailed and quite complex, there are general trends that become apparent relating to how both the carbon properties and the operating conditions affect the OOP s of adsorption heat pumps and refrigerators. The cooling available from the cycle is approximately proportional to the difference between the high and low concentrations and to the latent heat of the refrigerant. The heat input to the cycle has three components the sensible... 

Meunier, F., Second law analysis of a solid adsorption heat pump operating on reversible cascade cycles application to the zeolite-water pair. Heat Recovery Systems, 1985, 5, 133 141. 

Turner, L., Improvement of activated charcoal-ammonia adsorption heat pumping/refrigeration cycles. Investigation of porosity and heat/mass transfer characteristics. Ph.D. Thesis, University of Warwick, UK, 1992. 

The applieation of aetivated earbons in adsorption heat pumps and refrigerators is diseussed in Chapter 10. Sueh arrangements offer the potential for inereased efficiency because they utilize a primary fuel source for heat, rather than use electrieity, which must first be generated and transmitted to a device to provide mechanical energy. The basic adsorption cycle is analyzed and reviewed, and the ehoiee of refrigerant-adsorbent pairs discussed. Potential improvements in eost effeetiveness are detailed, including the use of improved adsorbent carbons, advanced cycles, and improved heat transfer in the granular adsorbent earbon beds. 

Commission. The work in this project will start in April 2003 and will continue for three years. One of the objectives is the development of a gas fired adsorption heat pump coupled to an underground storage system. That means the size of the sorption storage system is reduced significantly, a large number of cycles is possible and the actual seasonal storage is now realized by the UTES system. The economics of this concept are expected to be much better. 

Although adsorptive processes have been extensively studied for gas separation, catalysis, it is only recently that they have been proposed for heat management. M. Tather et al. [51] developed a mathematical model for a novel arrangement proposed in order to cope with the drawbacks originating from the inefficient heat and mass transfer in adsorption heating pumps with Zeolite 4A used as the adsorbent. L. Bonaccorsi et al. [52] have successfully synthesized zeolite coatings on metal supports with thickness ranging from few to several tens of microns, which had important technical applications in adsorption heat pumps. 

L. Turner, Improvement of Activated Charcoal Ammonia Adsorption Heat Pumping/Refrigeration Cycles-Investigation of Porosity and Heat/Mass... 

Douss, N, An experimental study of solid adsorption heat-pump cycles, Int. Chem. Eng., 32(4), 718-725 (1992). El-Halwagi, M.M., and Srinivas, B.K., Synthesis of reactive mass-exchange networks, Chem. Eng. Sci., 47(8). 

Cacciola, G., et al.. Preformed zeolite products to be used in adsorption heat pumps Preparation methodology and adsorption measurements, Adsorpt. Sci. Technol., 7(3), 163-171 (1991). 

Pino, L., et al.. Composite materials based on zeolite 4A for adsorption heat pumps. Adsorption, 3(1), 33-40 (1997). 

Kawano, T, et al. (2008). Preparation of Activated Carbon from Petroleum Coke by KOH Chemical Activation for Adsorption Heat Pump. Applied Thermal Engineering, 28(8-9), 865-871. 

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