Development and case study of the liquid desiccant system module in sorption system simulation program (SorpSim)

Zhiyao Yang; Ming Qu; Omar Abdelaziz; Kyle R. Gluesenkamp

doi:10.1016/j.applthermaleng.2019.114261

Development and case study of the liquid desiccant system module in sorption system simulation program (SorpSim)

Zhiyao Yang, Ming Qu, Omar Abdelaziz, Kyle R. Gluesenkamp

Thermal Energy Storage

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Liquid desiccant systems (LDS) have recently seen an increase in research interest as they can utilize low-grade heat resources and separate the sensible and latent cooling loads by efficiently removing moisture in the air without cooling it to the dew point. However, simulation and analysis of LDS had remained complex and demanding due to the limited resources of LDS simulation tools. This work presents the new LDS module developed in the Sorption system Simulation program (SorpSim), which is an open-source and flexible platform for steady-state simulation and analysis of various sorption systems. First, the new LDS module containing a finite-difference model and an effectiveness-NTU model for the heat and mass transfer in LDS dehumidifier/regenerator component was introduced. Then the simulation results of the new module were verified using data from the literature. Finally, a case study was carried out in SorpSim where an LDS cycle was built and simulated using the new module. The impacts of design and operating parameters on the simulated LDS performance were investigated. The parametric study revealed that a high source temperature improved moisture removal rate (MRR) but reduced the system coefficient of performance (COP); the COP increased monotonically with the desiccant solution recirculation ratio, while the MRR peaked at a ratio of 85%; and an internal solution heat exchanger with UA of 800 W/K was found to be sufficient for optimal performance under high recirculation ratios. The case study demonstrated the LDS module's capability to facilitate the analysis of LDS design and operation. The LDS module can be further coupled with other component models in SorpSim to simulate and analyze various liquid-desiccant-based systems.

Original language	English
Article number	114261
Journal	Applied Thermal Engineering
Volume	162
DOIs	https://doi.org/10.1016/j.applthermaleng.2019.114261
State	Published - Nov 5 2019

Funding

This research was funded by the Oak Ridge National Laboratory, under funding of the U.S. Department of Energy Building Equipment Technology Program. This research was funded by the Oak Ridge National Laboratory, under funding of the U.S. Department of Energy Building Equipment Technology Program. SorpSim is based on ABSIMW Version 5.0, initiated and developed by Prof. Gershon Grossman of the Technion ? Israel Institute of Technology, for the Oak Ridge National Laboratory, under funding of the U.S. Department of Energy Building Equipment Technology Program.

Funders	Funder number
U.S. Department of Energy Building Equipment Technology Program
Oak Ridge National Laboratory
Technion-Israel Institute of Technology

Keywords

Air conditioning
Analysis
Liquid desiccant
Simulation

Access to Document

10.1016/j.applthermaleng.2019.114261

Cite this

@article{808007dc6bda4dddbd56e5080525d524,

title = "Development and case study of the liquid desiccant system module in sorption system simulation program (SorpSim)",

abstract = "Liquid desiccant systems (LDS) have recently seen an increase in research interest as they can utilize low-grade heat resources and separate the sensible and latent cooling loads by efficiently removing moisture in the air without cooling it to the dew point. However, simulation and analysis of LDS had remained complex and demanding due to the limited resources of LDS simulation tools. This work presents the new LDS module developed in the Sorption system Simulation program (SorpSim), which is an open-source and flexible platform for steady-state simulation and analysis of various sorption systems. First, the new LDS module containing a finite-difference model and an effectiveness-NTU model for the heat and mass transfer in LDS dehumidifier/regenerator component was introduced. Then the simulation results of the new module were verified using data from the literature. Finally, a case study was carried out in SorpSim where an LDS cycle was built and simulated using the new module. The impacts of design and operating parameters on the simulated LDS performance were investigated. The parametric study revealed that a high source temperature improved moisture removal rate (MRR) but reduced the system coefficient of performance (COP); the COP increased monotonically with the desiccant solution recirculation ratio, while the MRR peaked at a ratio of 85%; and an internal solution heat exchanger with UA of 800 W/K was found to be sufficient for optimal performance under high recirculation ratios. The case study demonstrated the LDS module's capability to facilitate the analysis of LDS design and operation. The LDS module can be further coupled with other component models in SorpSim to simulate and analyze various liquid-desiccant-based systems.",

keywords = "Air conditioning, Analysis, Liquid desiccant, Simulation",

author = "Zhiyao Yang and Ming Qu and Omar Abdelaziz and Gluesenkamp, {Kyle R.}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = nov,

day = "5",

doi = "10.1016/j.applthermaleng.2019.114261",

language = "English",

volume = "162",

journal = "Applied Thermal Engineering",

issn = "1359-4311",

publisher = "Elsevier",

}

TY - JOUR

T1 - Development and case study of the liquid desiccant system module in sorption system simulation program (SorpSim)

AU - Yang, Zhiyao

AU - Qu, Ming

AU - Abdelaziz, Omar

AU - Gluesenkamp, Kyle R.

PY - 2019/11/5

Y1 - 2019/11/5

N2 - Liquid desiccant systems (LDS) have recently seen an increase in research interest as they can utilize low-grade heat resources and separate the sensible and latent cooling loads by efficiently removing moisture in the air without cooling it to the dew point. However, simulation and analysis of LDS had remained complex and demanding due to the limited resources of LDS simulation tools. This work presents the new LDS module developed in the Sorption system Simulation program (SorpSim), which is an open-source and flexible platform for steady-state simulation and analysis of various sorption systems. First, the new LDS module containing a finite-difference model and an effectiveness-NTU model for the heat and mass transfer in LDS dehumidifier/regenerator component was introduced. Then the simulation results of the new module were verified using data from the literature. Finally, a case study was carried out in SorpSim where an LDS cycle was built and simulated using the new module. The impacts of design and operating parameters on the simulated LDS performance were investigated. The parametric study revealed that a high source temperature improved moisture removal rate (MRR) but reduced the system coefficient of performance (COP); the COP increased monotonically with the desiccant solution recirculation ratio, while the MRR peaked at a ratio of 85%; and an internal solution heat exchanger with UA of 800 W/K was found to be sufficient for optimal performance under high recirculation ratios. The case study demonstrated the LDS module's capability to facilitate the analysis of LDS design and operation. The LDS module can be further coupled with other component models in SorpSim to simulate and analyze various liquid-desiccant-based systems.

AB - Liquid desiccant systems (LDS) have recently seen an increase in research interest as they can utilize low-grade heat resources and separate the sensible and latent cooling loads by efficiently removing moisture in the air without cooling it to the dew point. However, simulation and analysis of LDS had remained complex and demanding due to the limited resources of LDS simulation tools. This work presents the new LDS module developed in the Sorption system Simulation program (SorpSim), which is an open-source and flexible platform for steady-state simulation and analysis of various sorption systems. First, the new LDS module containing a finite-difference model and an effectiveness-NTU model for the heat and mass transfer in LDS dehumidifier/regenerator component was introduced. Then the simulation results of the new module were verified using data from the literature. Finally, a case study was carried out in SorpSim where an LDS cycle was built and simulated using the new module. The impacts of design and operating parameters on the simulated LDS performance were investigated. The parametric study revealed that a high source temperature improved moisture removal rate (MRR) but reduced the system coefficient of performance (COP); the COP increased monotonically with the desiccant solution recirculation ratio, while the MRR peaked at a ratio of 85%; and an internal solution heat exchanger with UA of 800 W/K was found to be sufficient for optimal performance under high recirculation ratios. The case study demonstrated the LDS module's capability to facilitate the analysis of LDS design and operation. The LDS module can be further coupled with other component models in SorpSim to simulate and analyze various liquid-desiccant-based systems.

KW - Air conditioning

KW - Analysis

KW - Liquid desiccant

KW - Simulation

UR - http://www.scopus.com/inward/record.url?scp=85070854112&partnerID=8YFLogxK

U2 - 10.1016/j.applthermaleng.2019.114261

DO - 10.1016/j.applthermaleng.2019.114261

M3 - Article

AN - SCOPUS:85070854112

SN - 1359-4311

VL - 162

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

M1 - 114261

ER -

Development and case study of the liquid desiccant system module in sorption system simulation program (SorpSim)

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this