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Solar Assisted Solid Desiccant—Vapor Compression Hybrid Air-Conditioning System

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Applications of Solar Energy

Part of the book series: Energy, Environment, and Sustainability ((ENENSU))

Abstract

Solar assisted solid desiccant—vapor compression based hybrid space cooling system for building thermal comfort is made by integrating desiccant based dehumidification system as well as by use of solar heating system along with conventional VCR system. This is because in humid climates, excessive humidity during summer leading to inefficiencies of conventional cooling devices. Humidity increment in ambient air as well as ventilation requirement suddenly rises the latent load of the space to be cooled. Conventional VCR systems are not effective in handling both temperature and relative humidity of cooling air independently. The application of solid desiccant based hybrid cooling systems significantly ameliorates the humidity control irrespective of temperature of supply air. The application of renewable free energy like as use of solar energy for regenerating the desiccant used in desiccant wheel helps us to alleviate the major requirement of electric energy needed by conventional VCR air-conditioning system for hot sunny days. So, it ameliorates overall energy efficiency and reduces energy costs. Performance of solid desiccant—vapor compression based hybrid building space comfort cooling system has been evaluated during hot and humid period from April to September for the ambient conditions of the Roorkee for various important parameters such as temperatures of supply air, room air and regeneration air etc. Regeneration temperature is one of the most important parameters having the key role in changing the performance of desiccant based cooling system.

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Abbreviations

COP:

Coefficient of performance

E :

Electrical power consumption (kW)

h :

Enthalpy (kJ/kg)

m :

Mass flow rate of air stream (kg/s)

MRR:

Moisture removal rate (kg/h)

Q cc :

Cooling capacity (kW)

Q reg :

Reactivation heat addition (kW)

RH:

Air relative humidity (%)

T :

Dry bulb temperature (K)

TRNSYS:

Transient system simulation

VCR:

Vapor compression refrigeration

ε :

Dehumidifier effectiveness

ω :

Air humidity ratio (g/kg)

a :

Dry air

dw :

Rotary dehumidifier

hrw :

Enthalpy wheel

p :

Process air

r :

Regeneration air

1,2, etc.:

Reference state points

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Authors and Affiliations

  1. Gujarat Technological University, G.T.U., Ahmedabad, Gujarat, India

    D. B. Jani

  2. Department of Mechanical & Industrial Engineering, I.I.T., Roorkee, Uttarakhand, India

    Manish Mishra & P. K. Sahoo

Authors
  1. D. B. Jani
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  2. Manish Mishra
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  3. P. K. Sahoo
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Corresponding author

Correspondence to D. B. Jani .

Editor information

Editors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab, India

    Himanshu Tyagi

  2. Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India

    Avinash Kumar Agarwal

  3. Department of Mechanical Engineering, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan, India

    Prodyut R. Chakraborty

  4. School of Engineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, India

    Satvasheel Powar

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Jani, D., Mishra, M., Sahoo, P. (2018). Solar Assisted Solid Desiccant—Vapor Compression Hybrid Air-Conditioning System. In: Tyagi, H., Agarwal, A., Chakraborty, P., Powar, S. (eds) Applications of Solar Energy. Energy, Environment, and Sustainability. Springer, Singapore. https://doi.org/10.1007/978-981-10-7206-2_12

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  • DOI: https://doi.org/10.1007/978-981-10-7206-2_12

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  • Online ISBN: 978-981-10-7206-2

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