Kaiser Ahmed Rocky

Kaiser Ahmed Rocky
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Kaiser Ahmed verified their affiliation via an institutional email.
Verified
Kaiser Ahmed verified their affiliation via an institutional email.
University of Dhaka · Department of Physics

Ph.D.

About

29
Publications
6,340
Reads
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707
Citations
Introduction
Kaiser Ahmed Rocky is working as a faculty member at the Department of Physics, University of Dhaka, Bangladesh. His research area includes porous materials, adsorption, CO2 capture, composite adsorbents, applied thermal science, and applied energy.
Additional affiliations
February 2017 - present
University of Dhaka
Position
  • Professor (Assistant)
December 2014 - February 2017
University of Dhaka
Position
  • Lecturer
January 2014 - December 2014
Jagannath University
Position
  • Lecturer

Publications

Publications (29)
Article
The consolidated composite adsorbents containing AQSOA-Z02 zeolite and graphene nanoplatelets (GNPs), recently developed and exhibiting excellent thermophysical and water adsorption characteristics, are found to overcome the above-mentioned limiting factors. However, rigorous thermodynamic analysis has not yet been studied, which is crucial in the...
Article
Global energy demand has risen due to rapid development and overpopulation. Heating, ventilation, and air conditioning (HVAC) systems consume over half of all energy consumed in buildings and account for 10 to 20% of overall energy consumption in developed countries. Worldwide, energy-intensive vapor compression systems are employed for HVAC applic...
Article
Activated carbon (AC)/CO2 pair is very promising for developing an efficient adsorption cooling system (ACS). However, the low packing density and poor heat transfer properties of activated carbon-based ACS prevent their widespread adoption. Addressing these issues, this study focuses on the synthesis and characterization of AC-based consolidated c...
Chapter
A set of thermal compressors (often referred to as adsorption beds) is employed in an adsorption heat pump (AHP) system to achieve the desired cooling, whereas electricity-driven compressors are used in a conventional vapor compression refrigeration system (VCRS). Although an AHP is much more environmentally friendly than VCRS, its massive size is...
Article
Adsorption-assisted energy conversion technologies are receiving extensive attention recently as a sustainable technology for meeting the worldwide energy demand. The advancement of this technology relies on the development of the mass and heat transfer properties of the adsorbent materials. MOF-801, a zirconium-based microporous metal organic fram...
Article
To further the research on R32 refrigerant-based adsorption cooling applications, Maxsorb-III activated carbon composites synthesized with the additives of H25 Graphene nanoplatelets (GNP), 1-Hexyl-3-methylimidazolium bis(trifluormethylsulfonyl)imide ([HMIM][Tf2N]) ionic liquid with polyvinyl alcohol (PVA) are studied for cooling performance evalua...
Chapter
Environmentally benign adsorption heat pump (AHP) and desalination (AD) systems have already attracted considerable attention for space cooling/heating and potable water production since they require no electricity and are driven by solar or waste heat. The adsorbent material is the key element of these adsorption systems. Highly porous carbon-base...
Conference Paper
Full-text available
Low-grade waste heat or renewable energy powered adsorption cooling system (ACS) is considered a potential alternative option to the conventional vapor compression system. Adsorbent/adsorbate pair is the key element of an ACS. Among several adsorbents, activated carbon (AC) is found very promising. The low packing density and poor heat transfer pro...
Article
Utilization of water as a refrigerant in adsorption cooling systems is a challenging task due to the unavailability of suitable adsorbents. Recently, a new class of porous material, metal-organic frameworks (MOFs), is heightening interest as the potential adsorbent for water adsorption due to its crucial S-shaped adsorption isotherm characteristics...
Article
Synthesis and thermal characterization of paraffin-based nanocomposites for thermal energy storage applications, Thermal Science and Engineering Progress (2020), doi: https://doi. Abstract Nowadays, phase change materials (PCMs) have gained considerable attention for thermal energy storage applications. However, commonly used PCM, such as paraffin...
Article
The present study focuses on the synthesis and characterization of new composites comprising of RD silica gel and metal-organic framework (MOF) MIL 100(Fe) to upgrade the performance of the adsorption-based atmospheric water harvesting system. The impact of adding MIL 100(Fe) on the porous properties, thermal conductivity, and water adsorption char...
Article
The present study focuses on the synthesis and characterization of new composites comprising of RD silica gel and metal-organic framework (MOF) MIL 100(Fe) to upgrade the performance of the adsorption-based atmospheric water harvesting system. The impact of adding MIL 100(Fe) on the porous properties, thermal conductivity, and water adsorption char...
Article
In an attempt to promote research on adsorption cooling systems, novel activated carbon-based composite adsorbents have been studied for thermophysical properties and adsorption characterization with difluoromethane (HFC 32) refrigerant. High surface area activated carbon of type Maxsorb III has been selected as the primary constituent of adsorbent...
Article
Adsorption systems are known as energy-saving and environmentally friendly technology, and porous adsorbent material is one of the critical elements of it. High-efficiency, compactness, and cost concern of these systems have motivated the preparation of functional carbons from waste biomass materials, which could be a promising adsorbent in the nea...
Article
Low-temperature waste heat-powered adsorption heat transformation (AHT) is an energy-efficient and green technology, which is considered a promising alternative to the conventional vapor compression systems. The performance of an AHT system generally depends on the properties of adsorbents and adsorbates. The poor heat transfer and low packing dens...
Article
In this study, consolidated composite adsorbents comprising highly porous zeolite of type AQSOA-Z02 and two types of graphene nanoplatelets (GNPs), namely H25-GNPs and M25-GNPs, are developed to enhance the performance of a thermally powered adsorption heat pump. The thermophysical properties such as specific heat capacity, packing density, thermal...
Article
Nowadays, phase change materials (PCMs) have gained considerable attention for thermal energy storage applications. However, commonly used PCM, such as paraffin wax, suffers from low thermal conductivity. Therefore, the main objective of this study is to develop relatively higher thermally conductive PCM composites employing different mass fraction...
Article
Metal-organic frameworks (MOFs) are emerging as potential adsorbents for adsorption based systems intended for various applications. Aluminum fumarate is one of the promising MOFs for being used as an adsorbent for water-based adsorption heat pumps. Though there have been a lot of studies regarding water adsorption characterization of aluminum fuma...
Conference Paper
Full-text available
This article focuses on the possible applications of multi-walled carbon nanotube (MWCNT) in CO2 capture and adsorption cooling applications. In this study, surface properties namely surface area and porosity of MWCNT are assessed employing N2 adsorption/desorption method. It is observed that surface area and total pore volume of MWCNT are about 64...
Conference Paper
Full-text available
Highly porous activated carbon (AC) is strongly considered as a promising adsorbent in the field of adsorption heat pump (AHP) system, separation process and purification of gases. However, commercially available ACs are expensive and synthesized from coke and fossil fuel residue which require a lot of energy for the synthesis process. Therefore, r...
Article
Adsorption cooling system using composite adsorbent and high energy density adsorbate (CO2) provides a significant advantage to reduce the system geometry. This study presents the adsorption characteristics of CO2 onto synthesized composites employing graphene nanoplatelets (GNPs) and activated carbon (AC). The influence of GNPs in the composite is...
Article
Cement based thermoelectric materials can convert the available ambient heat absorbed by the building surfaces in summer into electrical energy. These materials can have an impact on the improvement of indoor climate of buildings, reduction of energy consumption and energy harvesting applications espe- cially in the urban areas. In this paper, the...
Conference Paper
Full-text available
In this study, consolidated composites are synthesized employing highly porous activated carbon as parent adsorbent, H grade graphene nanoplatelets (H25-GNP) as thermal conductivity enhancer (TCE) and polyvinyl alcohol (PVA) as binder. Thermal conductivity of the synthesized composites is measured using transient technique. Experimental results sho...
Article
Consolidated composites are strongly considered as promising adsorbents for adsorption cooling system (ACS) applications. Binder plays a vital role to synthesize consolidated composite. In this study, consolidated composites are synthesized employing highly porous activated carbon (AC) namely Maxsorb III and two types of binders: (i) polymerized io...
Conference Paper
For nanoscaled integrated circuit interconnects as a performance metric play a crucial role. In this paper high frequency effect especially the skin effect for these nano interconnects has been analyzed. Here as a carbon nano interconnect graphene nano-ribbon (GNR), carbon nanotube (CNT) has been analyzed in GHz frequency range. Initially the skin...
Conference Paper
The Resistor Capacitor (RC) model is used to analyze circuit parameters for a CNT-bundle interconnects. In this paper the performance of the single CNT interconnection with Cu and Au using predetermined equations was attempted first. Due to poor yield of single CNT, bundle of CNT was analyzed and eventually the performance of the CNT-bundle, copper...
Conference Paper
Full-text available
The Resistor Capacitor (RC) model is used to analyze circuit parameters for a CNT-bundle interconnects. In this paper the performance of the single CNT interconnection with Cu and Au using predetermined equations was attempted first. Due to poor yield of single CNT, bundle of CNT was analyzed and eventually the performance of the CNT-bundle, copper...

Questions

Question (1)
Question
In the Dynamic Light Scattering (DLS) method, the exponential decrease of the autocorrelation function means the Brownian motion of particles in the dispersant. If it does not decrease exponentially (if it follows polynomial, zigzag, or linear manner), then what does it indicate regarding the particle motion?

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