Performance Evaluation of Phenol-Resin-Based Adsorbents for Heat Transformation Applications

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dc.contributor.authorRiaz,Fahid
dc.contributor.authorFarooq, Muhammad
dc.contributor.authorSultan, Muhammad
dc.contributor.authorETAL..
dc.date.accessioned2024-05-08T08:48:04Z
dc.date.available2024-05-08T08:48:04Z
dc.date.issued2023-07-26
dc.descriptionResearch activities are shifting toward the development of energy-efficient solid sorption, namely adsorption heat pump (AHP) systems, which are acknowledged as a credible route for minimizing the exponential growth in energy demand in the air conditioning (AC) sector. Mechanical vapor compression (MVC) AC systems have a high coefficient of performance (COP) ranging between 3.0 and 5.0, consequently indicating their wide implementation as a convenient commercialized cooling/heating system [1,2]. However, environmental consequences aligned with the MVC-AC system include high global warming potential, emission of harmful greenhouse gasses, destruction of the ozone layer, and prominently alleviating the paucity of natural fossil fuel reserves [3]. On the other hand, radiative cooling technology that utilizes the principles of thermal radiation to achieve cooling without the need for mechanical compression holds great promise [4]. However, radiative cooling requires clear sky conditions and the need for direct exposure to the sky for effective heat dissipation [4]. The AHP system scavenges discarded low-grade waste heat, abundantly available in the surrounding environment, as a prime mover, thereby contributing its share to mitigating the environmental pollution [1,5].
dc.description.abstractPhenol resins (PRs) are considered as relatively inexpensive adsorbents synthesized from agricultural biomass via employing a variety of synthesized procedures. The performance of PR for heat transformation application is not widely investigated. In this regard, the present study aims to evaluate the four PR derivative/refrigerant pairs, namely (i) KOH6-PR/CO2, (ii) SAC-2/HFC, (iii) KOH4-PR/ethanol, and (iv) KOH6-PR/ethanol, for adsorption cooling and adsorption heating applications. Ideal cycle analyses and/or thermodynamic modelling approaches were utilized comprising governing heat and mass balance equations and adsorption equilibrium models. The performance of the AHP system is explored by means of specific cooling energy (SCE), specific heating energy (SHE), and coefficient of performance (COP), both for cooling and heating applications, respectively. It has been realized that KOH6-PR/ethanol could produce a maximum SCE of 1080 kJ/kg/cycle and SHE of 2141 kJ/kg/cycle at a regeneration temperature (Treg) and condenser temperature (Tcond) of 80 °C, and 10 °C, respectively, followed by KOH4-PR/ethanol, SAC-2/HFC-32, and KOH6-PR/CO2. The maximum COP values were estimated to be 1.78 for heating and 0.80 for cooling applications, respectively, at Treg = 80 °C and Tcond = 10 °C. In addition, the study reveals that, corresponding to increase/decrease in condenser/evaporator pressure, both SCE and SHE decrease/increase, respectively; however, this varies in magnitude due to adsorption equilibrium of the studied PR derivative/refrigerant pairs. Keywords: phenol resins; ideal cycle; specific cooling energy; specific heating energy
dc.identifier.citationAsfahan, H. M., Sultan, M., Farooq, M., Riaz, F., Ibrahim, S. M., Ahamed, M. S., & Imran, M. (2023). Performance Evaluation of Phenol-Resin-Based Adsorbents for Heat Transformation Applications. Materials, 16(15), 5262.
dc.identifier.doihttps://doi.org/10.3390/ma16155262
dc.identifier.urihttps://dspace.adu.ac.ae/handle/1/5273
dc.language.isoen
dc.publisherMDPI
dc.titlePerformance Evaluation of Phenol-Resin-Based Adsorbents for Heat Transformation Applications
dc.typeArticle

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