NTPC Transactions on Energy Research

A NETRA Initiative
Editor(s):

S.Shaswattam, Anil Kumar Das, Subrata Sarkar, Prahlad Halder

ISBN:
978-94-6463-848-6
Type of Book:
Edited Volume
Copyright Year:
2025
Open Access
ChapterPages 119-134

Design and Development of 10 kWh Solar Thermal Space Heating with Thermal Energy Storage

Authors
Ankit Gupta1, *, Neeraj Goswami1, Subrata Sarkar1, S. Shaswattam1
1Solar Thermal Group, NTPC Energy Technology Research Alliance, NTPC Ltd., Greater Noida, Uttar Pradesh, India
*Corresponding author. Email: ankitgupta02@ntpc.co.in
Corresponding Author
Ankit Gupta
Available Online 1 October 2025.
DOI
10.2991/978-94-6463-849-3_10How to use a DOI?
Keywords
Solar Thermal Heating; Solar Collectors; Thermal Energy Storage; Paraffin wax
Abstract

Solar space heating presents a sustainable solution for maintaining indoor thermal comfort by utilizing solar thermal energy. This technology is broadly categorized into active systems, which use fluid-based solar collectors and distribution mechanisms, and passive systems, which rely on architectural features to naturally capture and retain solar heat. The present study focuses on an active solar space heating system that integrates heat pipe-based evacuated tube collectors (ETCs) with a paraffin-based thermal energy storage (TES) unit to enable nighttime space heating in remote, cold regions. The system architecture comprises three key components: the solar collector unit, thermal energy storage unit, and space heater. Field implementation demonstrated an energy storage capacity of approximately 16 kWh under an average Global Horizontal Irradiance (GHI) of 2.4 kWh/m2, effectively maintaining consistent indoor temperatures throughout the night. The simplicity of installation, minimal maintenance requirements, and reliable performance under low solar input conditions underscore the system’s suitability for off-grid applications in regions such as Leh. The results affirm the viability of this integrated solar thermal system as an efficient, cost-effective solution for domestic space heating in sun-rich, high-altitude cold climates.

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.
Book Title
NTPC Transactions on Energy Research
Book Sub Title
A NETRA Initiative
Publication Date
1 October 2025
Print ISBN
978-94-6463-848-6
E-ISBN
978-94-6463-849-3
DOI
10.2991/978-94-6463-849-3_10How to use a DOI?
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  - Neeraj Goswami
AU  - Subrata Sarkar
AU  - S. Shaswattam
ED  - S.Shaswattam
ED  - Anil Kumar Das
ED  - Subrata Sarkar
ED  - Prahlad Halder
PY  - 2025
DA  - 2025/10/01
TI  - Design and Development of 10 kWh Solar Thermal Space Heating with Thermal Energy Storage
BT  - NTPC Transactions on Energy Research
PB  - Springer nature singapore
SP  - 119
EP  - 134
CY  - singapore
SN  - 978-94-6463-849-3
UR  - https://doi.org/10.2991/978-94-6463-849-3_10
DO  - 10.2991/978-94-6463-849-3_10
ID  - Gupta2025
ER  -