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Estimating the Power Saving of KCOOH Liquid Desiccant Dehumidification System Using a Statistical Method

  • Research Article-Mechanical Engineering
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Abstract

In hot and moist weather, a hybrid liquid desiccant dehumidification conditioning (LDAC) system is proposed as a viable substitute to stand-alone conventional vapour compression refrigeration (VCR) system because of their dominance in extracting the latent heat load from the air, being environmentally friendly, removing pollutants from the processed air, and consuming less electrical energy. The current research article experimentally investigates the dehumidification performance of a potassium formate (KCOOH) solution on an innovatively designed and developed 5-kW hybrid LDAC system. The main aim of this research paper is to optimize the performance parameters of a hybrid LDAC system employing a full factorial DOE design. The three input variables are selected to evaluate their effects on the three output performance responses. The regression correlation is obtained to anticipate the performance of the KCOOH solution for the output responses. The experimental result reveals that their improvement of 26.97% in \({\mathrm{COP}}_{{{\mathrm{Hybrid}}}}\) as compared to a stand-alone VCR unit and that the influence of inlet desiccant concentration is more prominent than the inlet mass flow rate and inlet desiccant temperature on the output responses.

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Abbreviations

AC:

Air conditioner

ANOVA:

Analysis of variance

C:

Desiccant concentration (\({\mathrm{kg}}_{{{\mathrm{desiccant}}}} /{\mathrm{kg}}_{{{\mathrm{solution}}}}\))

COP:

Coefficient of performance

\({\mathrm{COP}}_{{{\mathrm{Hybrid}}}}\) :

Coefficient of performance of a hybrid system

DOE:

Design of experiments

HE-1:

Heat exchanger 1

HE-2:

Heat exchanger 2

IAQ:

Indoor air quality

LDAC:

Liquid desiccant air-conditioning

LHL:

Latent heat load

KCOOH:

Potassium formate

TR:

Ton of refrigeration

VCR:

Vapour compression refrigeration

\(a_{1} {-} a_{7}\) :

Air states points

d 1–d 4 :

Desiccant solution state points

DA:

Dry air

\(\dot{m}_{a11}\) :

Inlet mass flow rate at level 1

\(\dot{m}_{a12}\) :

Inlet mass flow rate at level 2

\(\dot{m}_{a13}\) :

Inlet mass flow rate at level 3

sys:

System

T :

Temperature (K)

\(T_{d11}\) :

Inlet desiccant temperature at level 1

\(T_{d12}\) :

Inlet desiccant temperature at level 2

\(T_{d13}\) :

Inlet desiccant temperature at level 3

\(C_{11}\) :

Inlet desiccant concentration at level 1

\(C_{12}\) :

Inlet desiccant concentration at level 2

\(C_{13}\) :

Inlet desiccant concentration at level 3

\(\Delta w\) :

Specific humidity change

\(w\) :

Specific humidity

\(\emptyset\) :

Relative humidity

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Authors and Affiliations

  1. Department of Mechanical Engineering, Maulana Azad National Institute of Technology, 462003, Bhopal, India

    Kashish Kumar & Alok Singh

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  1. Kashish Kumar
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Correspondence to Kashish Kumar.

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Kumar, K., Singh, A. Estimating the Power Saving of KCOOH Liquid Desiccant Dehumidification System Using a Statistical Method. Arab J Sci Eng 48, 11441–11456 (2023). https://doi.org/10.1007/s13369-022-07482-1

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