NTPC Transactions on Energy Research
S.Shaswattam, Anil Kumar Das, Subrata Sarkar, Prahlad Halder
Solar Thermal-Based Desalination Using Non-Imaging Evacuated Tube Collectors with Compound Parabolic Concentrator
- DOI
- 10.2991/978-94-6463-849-3_9How to use a DOI?
- Keywords
- Solar Thermal; Evacuated Tube Collectors; Compound Parabolic Concentrator
- Abstract
Water scarcity is a major issue in coastal areas which is addressed by converting sea water to potable water through reverse osmosis known as Seawater reverse-osmosis (SWRO). This process requires heat which is often achieved through electrical energy. In the first-of-its-kind facility in India, a 120 tons per day solar thermal based sea water desalination was developed, and deployed at NTECL Vallur, which utilizes Non-Imaging Evacuated Tube Collectors (ETCs) integrated with Compound Parabolic Concentrators (CPCs) enclosed in toughened glass covers to harness Global Horizontal Irradiance (GHI). This system eliminates the need for solar tracking. The system produces hot water at an average temperature of 68℃, with an 11℃ temperature differential across the solar field under an average GHI of 557 W/m2. The heated water is supplied to a six-effect Multiple Effect Distillation (MED) unit for desalination. Over a six-hour operating window, the plant achieved a distillate production rate of 5.5 tons per hour, with a product water conductivity of approximately 4.3 µS/cm, TDS of 40 mg/L, and pH of 7.2.
- Copyright
- © 2025 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits any noncommercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if you modified the licensed material. You do not have permission under this license to share adapted material derived from this chapter or parts of it.
Cite this article
TY - CHAP AU - Ankit Gupta AU - Swapnil Patil ED - S.Shaswattam ED - Anil Kumar Das ED - Subrata Sarkar ED - Prahlad Halder PY - 2025 DA - 2025/10/01 TI - Solar Thermal-Based Desalination Using Non-Imaging Evacuated Tube Collectors with Compound Parabolic Concentrator BT - NTPC Transactions on Energy Research PB - Springer nature singapore SP - 105 EP - 118 CY - singapore SN - 978-94-6463-849-3 UR - https://doi.org/10.2991/978-94-6463-849-3_9 DO - 10.2991/978-94-6463-849-3_9 ID - Gupta2025 ER -