Abstract
This paper concerns the issue of the proper selection of the operating parameters of the fluidised desiccant cooler. Despite the fact that fluidised desiccant cooling technology is being reported in the literature as an efficient way to provide cooling for the purposes of air-conditioning, the improper control of its operation can lead to a significantly worse performance than expected. The objective of the presented theoretical study is to provide guidelines on the proper selection of such operating parameters of a fluidized desiccant cooler, such as superficial air velocity, desiccant particle diameter, bed switching time, and desiccant filling height. The influence of the chosen operating parameters on the performance of fluidised desiccant cooling technology is investigated based on their impact on electric and thermal coefficients of performance (COP) and specific cooling power (SCP). Moreover, the influence of the outlet air temperature, humidity, and desiccant water uptake on the adsorption/desorption characteristics was investigated, contributing to better understanding of sorption processes.
Highlights
Alternative cooling technologies, such as fluidised desiccant coolers, are nowadays of great interest
The influence of operating parameters on the adsorption/desorption characteristics and the performance of the fluidised desiccant cooler was investigated by means of a simulation procedure based on our theoretical modelling
A decrease of the desiccant particle diameter improves the performance of FDC, mainly by reducing the intraparticle mass transfer resistance and thereby enhancing the sorption kinetics
Summary
Alternative cooling technologies, such as fluidised desiccant coolers, are nowadays of great interest. Thanks to its advantages, fluidised desiccant cooling is especially promising. Unlike adsorption cooling [1,2], it does not require low pressure maintenance, which greatly affects investment costs. On the other hand, when compared to fixed beds systems, it provides increased adsorption kinetics and a lower air pressure drop [3]. This technology is at the early stage of development, a few prototypes of fluidised desiccant dehumidifiers (fluidised beds) have been already developed. The prototype of a low-cost self-circulating fluidised desiccant dehumidifier was presented by
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