Analytical characteristic equation of N identical evacuated tubular collectors integrated double slope solar still

[+] Author and Article Information
Desh Bandhu Singh

Centre for Energy Studies, Indian Institute of Technology Delhi, HausKhas, New Delhi, 110016, India

GN Tiwari

Bag Energy Research Society, Sodha Bers Complex, Plot No. 51, Mahamana Nagar, Karaudi, Varanasi, Uttar Pradesh, 221005, India

1Corresponding author.

ASME doi:10.1115/1.4036855 History: Received February 07, 2017; Revised May 01, 2017


In this paper, analytical expression for characteristic equation of double slope solar still included with series connected N identical evacuated tubular collectors (N-ETC-DS) has been developed. The derivation is based on fundamental energy balance equations for various components of the proposed system. The analytical result of the proposed N-ETC-DS has been compared with results reported by earlier researchers for the same basin area under similar climatic condition. It has been concluded that daily energy efficiency is higher by 23.90%, 26.45% and 42.65% for N-ETC-DS than N identical partially covered photovoltaic thermal (PVT) compound parabolic concentrator collectors integrated double slope solar still, N identical partially covered PVT flat plate collectors integrated double slope solar still and conventional double slope solar still respectively at 0.14 m water depth under optimized condition. Moreover, daily yield, exergy, energy and exergy efficiency have been computed.

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