Effect of relative humidity on thermal conductivity of zeolite-based adsorbents: Theory and experiments

Shazia Hanif, Muhammad Sultan, Takahiko Miyazaki

Research output: Contribution to journalArticle

Abstract

Effective thermal conductivity (ETC) of the adsorbent is an important parameter which influences the performance of the adsorption heat pump and adsorption cooling systems. Most of the adsorbents are porous in nature and therefore adsorption uptake is affected due to different operating conditions i.e. temperature and relative humidity (RH) that result in different ETC. Effect of temperature on ETC is somehow well-known in the literature, however, studies on RH effect are limited. Therefore, present study experimentally investigates the RH effect on the thermal conductivity of the commercially available zeolite-based adsorbents which are traded as: AQSOA-Z02 (zeolite-1) and AQSOA-Z05 (zeolite-2). The study is useful for the researcher who are working in the field of adsorption cooling, air-conditioning and desalination. In this regard, an experimental setup was developed by which the ETC was measured at different levels of RH. According to the results, the ETC of oven dried zeolite-1 and zeolite-2 was 0.060 W m−1 K−1 and 0.066 W m−1 K−1, respectively. With the increase in RH, the value of ETC increases up to 0.090 W m−1 K−1 for zeolite-1 and 0.089 W m−1 K−1 for zeolite-2. Moreover, an empirical relation is proposed which can estimate ETC at different levels of RH for both adsorbents.

Original languageEnglish
Pages (from-to)11-18
Number of pages8
JournalApplied Thermal Engineering
Volume150
DOIs
Publication statusPublished - Mar 5 2019

Fingerprint

Adsorbents
Thermal conductivity
Atmospheric humidity
Experiments
Adsorption
Ovens
Desalination
Cooling systems
Air conditioning
Pumps
Cooling
Temperature

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

Effect of relative humidity on thermal conductivity of zeolite-based adsorbents : Theory and experiments. / Hanif, Shazia; Sultan, Muhammad; Miyazaki, Takahiko.

In: Applied Thermal Engineering, Vol. 150, 05.03.2019, p. 11-18.

Research output: Contribution to journalArticle

@article{d8923f21032d4f08a840b39af0b4f2f5,
title = "Effect of relative humidity on thermal conductivity of zeolite-based adsorbents: Theory and experiments",
abstract = "Effective thermal conductivity (ETC) of the adsorbent is an important parameter which influences the performance of the adsorption heat pump and adsorption cooling systems. Most of the adsorbents are porous in nature and therefore adsorption uptake is affected due to different operating conditions i.e. temperature and relative humidity (RH) that result in different ETC. Effect of temperature on ETC is somehow well-known in the literature, however, studies on RH effect are limited. Therefore, present study experimentally investigates the RH effect on the thermal conductivity of the commercially available zeolite-based adsorbents which are traded as: AQSOA-Z02 (zeolite-1) and AQSOA-Z05 (zeolite-2). The study is useful for the researcher who are working in the field of adsorption cooling, air-conditioning and desalination. In this regard, an experimental setup was developed by which the ETC was measured at different levels of RH. According to the results, the ETC of oven dried zeolite-1 and zeolite-2 was 0.060 W m−1 K−1 and 0.066 W m−1 K−1, respectively. With the increase in RH, the value of ETC increases up to 0.090 W m−1 K−1 for zeolite-1 and 0.089 W m−1 K−1 for zeolite-2. Moreover, an empirical relation is proposed which can estimate ETC at different levels of RH for both adsorbents.",
author = "Shazia Hanif and Muhammad Sultan and Takahiko Miyazaki",
year = "2019",
month = "3",
day = "5",
doi = "10.1016/j.applthermaleng.2018.12.144",
language = "English",
volume = "150",
pages = "11--18",
journal = "Applied Thermal Engineering",
issn = "1359-4311",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Effect of relative humidity on thermal conductivity of zeolite-based adsorbents

T2 - Theory and experiments

AU - Hanif, Shazia

AU - Sultan, Muhammad

AU - Miyazaki, Takahiko

PY - 2019/3/5

Y1 - 2019/3/5

N2 - Effective thermal conductivity (ETC) of the adsorbent is an important parameter which influences the performance of the adsorption heat pump and adsorption cooling systems. Most of the adsorbents are porous in nature and therefore adsorption uptake is affected due to different operating conditions i.e. temperature and relative humidity (RH) that result in different ETC. Effect of temperature on ETC is somehow well-known in the literature, however, studies on RH effect are limited. Therefore, present study experimentally investigates the RH effect on the thermal conductivity of the commercially available zeolite-based adsorbents which are traded as: AQSOA-Z02 (zeolite-1) and AQSOA-Z05 (zeolite-2). The study is useful for the researcher who are working in the field of adsorption cooling, air-conditioning and desalination. In this regard, an experimental setup was developed by which the ETC was measured at different levels of RH. According to the results, the ETC of oven dried zeolite-1 and zeolite-2 was 0.060 W m−1 K−1 and 0.066 W m−1 K−1, respectively. With the increase in RH, the value of ETC increases up to 0.090 W m−1 K−1 for zeolite-1 and 0.089 W m−1 K−1 for zeolite-2. Moreover, an empirical relation is proposed which can estimate ETC at different levels of RH for both adsorbents.

AB - Effective thermal conductivity (ETC) of the adsorbent is an important parameter which influences the performance of the adsorption heat pump and adsorption cooling systems. Most of the adsorbents are porous in nature and therefore adsorption uptake is affected due to different operating conditions i.e. temperature and relative humidity (RH) that result in different ETC. Effect of temperature on ETC is somehow well-known in the literature, however, studies on RH effect are limited. Therefore, present study experimentally investigates the RH effect on the thermal conductivity of the commercially available zeolite-based adsorbents which are traded as: AQSOA-Z02 (zeolite-1) and AQSOA-Z05 (zeolite-2). The study is useful for the researcher who are working in the field of adsorption cooling, air-conditioning and desalination. In this regard, an experimental setup was developed by which the ETC was measured at different levels of RH. According to the results, the ETC of oven dried zeolite-1 and zeolite-2 was 0.060 W m−1 K−1 and 0.066 W m−1 K−1, respectively. With the increase in RH, the value of ETC increases up to 0.090 W m−1 K−1 for zeolite-1 and 0.089 W m−1 K−1 for zeolite-2. Moreover, an empirical relation is proposed which can estimate ETC at different levels of RH for both adsorbents.

UR - http://www.scopus.com/inward/record.url?scp=85059505657&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059505657&partnerID=8YFLogxK

U2 - 10.1016/j.applthermaleng.2018.12.144

DO - 10.1016/j.applthermaleng.2018.12.144

M3 - Article

VL - 150

SP - 11

EP - 18

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

ER -