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Energy and economic analysis of a solar-assisted multi-commodity cold storage

  • Ramen Kanti DeEmail author
  • A. Ganguly
Technical Paper
  • 25 Downloads

Abstract

Most of the existing cold storages of the developing countries are dedicated toward storage of a single commodity due to which they remain underutilized for a considerable part of a year. In this paper, a conceptual design of multi-commodity cold storage has been discussed to store three high-value perishable commodities for different periods of a calendar year for round the year utilization of the cold storage facility. A cooling system based on the lithium bromide–water absorption system has been designed to maintain a favorable inside microclimate. A solar thermal–photovoltaic-based hybrid power system has been designed to meet the thermal and electrical loads of the system. The performance of the cold storage system has been analyzed using a thermal model for a complete calendar year for the climatic condition of Kolkata, India. A life-cycle cost analysis of the power system has also been carried out. The study revealed that the product load contributes toward 70% of the cooling load during the months of product loading. It is also observed that forty-six numbers of parabolic trough collectors along with two hundred seventy-five numbers of SPV modules of 150 Wp each can meet the major fraction of the load on an annual basis. The economic analysis revealed that the payback period of the integrated power system is only 6.22 years. The study thus reinforces the viability of solar-powered multi-commodity cold storages for the developing countries of the world both from the technical and economic point of view.

Keywords

Cold storage Multi-commodity SPV PTC LiBr–H2

List of symbols

C

Cost (INR)

cp

Specific heat (kJ/kg K)

f

Heat transfer coefficient (W/m2 K)

G

Irradiance (W/m2)

h

Specific enthalpy (kJ/kg)

k

Thermal conductivity (W/mK)

\(\dot{m}\)

Mass flow rate (kg/s)

N

Number of persons/number of air changes

Q

Rate of heat transfer (kW)

\(\dot{V}\)

Volume flow rate (m3/s)

X

Concentration of LiBr in solution (%)

Greek symbols

\(\varepsilon\)

Emissivity

\(\gamma\)

Intercept factor

\(\rho\)

Density/reflectivity

\(\tau\)

Transmissivity

\(\sigma\)

Stefan–Boltzmann constant (W/m2 K4)

\(\eta\)

Efficiency

Subscripts

1,2,3–11

State points

A

Absorber

C

Condenser

E

Evaporator

equip

Equipment

G

Generator

inf

Infiltration

P

Pump

prod

Product

F

Fan

str

Structural

Abbreviations

COP

Coefficient of performance

GWP

Global warming potential

HTF

Heat transfer fluid

ODP

Ozone depletion potential

PTC

Parabolic trough collector

SPV

Solar photovoltaic

VAR

Vapor absorption refrigeration

Notes

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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringOmDayal Group of InstitutionsUluberia, HowrahIndia
  2. 2.Department of Mechanical EngineeringIndian Institute of Engineering Science and TechnologyShibpur, HowrahIndia

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