Key Facts & Data

  • India’s gas import dependence: ~50 % of natural gas consumption is imported.
  • CST potential in India: 6.4 GW (MNRE estimate).
  • Temperature ranges:
  • CST: up to 400 °C (suitable for steam‑based processes).
  • Induction heating: >90 % thermal efficiency, rapid heating.
  • Plasma torches: 5,000 °C – 10,000 °C for ultra‑high‑temperature applications.
  • Global best‑practice projects:
  • Oman – Miraah (≈80 % gas reduction).
  • Spain – plug‑and‑play solar thermal units.
  • Denmark – Heat Purchase Agreements with CST/induction.

Background & Context

  • The US‑Israel‑Iran tension has heightened the risk of disruptions in the Strait of Hormuz, a vital oil and gas corridor.
  • India’s industrial sector, especially textiles, automotive, cement and ceramics, relies heavily on fossil‑fuel‑based heat.
  • Decarbonising heat is critical for meeting India’s Nationally Determined Contributions (NDCs) and the Paris Agreement goals.

Significance for India & Policy

  • Energy security: Reduces reliance on volatile imported gas.
  • Industrial decarbonisation: Lowers CO₂ intensity of high‑temperature processes.
  • Economic benefits: Thermal storage is cheaper than lithium‑ion batteries; on‑site generation cuts grid demand.
  • Policy alignment:
  • Ministry of New & Renewable Energy (MNRE) promotes CST and electrified heating under the National Solar Mission.
  • Energy Conservation (Amendment) Act, 2023 encourages adoption of high‑efficiency heating.
  • Perform, Achieve and Trade (PAT) Scheme can be extended to cover industrial heat.

Related Constitutional / Legal Provisions

  • Article 246 – Union List entry 12 (Power) and 23 (Electricity) empower the Centre to legislate on energy policy.
  • Section 5 of the Electricity Act, 2003 – mandates promotion of renewable energy and efficient use of electricity.
  • National Electricity Policy (2022) – emphasizes grid‑independent renewable solutions for industry.

Technologies Overview

Concentrated Solar Thermal (CST)

  • Mirrors concentrate sunlight onto a receiver.
  • Heat stored in Thermal Energy Storage (TES) – oil, molten salt, or phase‑change materials.
  • Advantages: On‑site heat, 24/7 operation, cheaper storage than batteries.

Electromagnetic Induction Heating

  • AC through a copper coil creates a fluctuating magnetic field.
  • Eddy currents in conductive material generate Joule heating.
  • Advantages: >90 % efficiency, rapid & precise heating, zero direct emissions when powered by renewables.

Plasma Torches

  • High‑voltage arc ionises a working gas, forming plasma.
  • Releases 5,000 °C – 10,000 °C heat.
  • Advantages: Ultra‑high temperatures, controllable atmosphere, direct replacement for coal/gas furnaces.

Implementation Roadmap for India

  1. Policy incentives: Viability Gap Funding, accelerated depreciation for CST/induction assets.
  2. Industrial clusters: Set up solar‑thermal hubs in textile belts, cement corridors.
  3. Skill development: Training under PM Surya Ghar Muft Bijli Yojana for installation & maintenance.
  4. Financing: Green bonds, credit linked subsidies.
  5. Monitoring: Integrate with Energy Management Information System (EMIS) for real‑time efficiency tracking.

Frequently Asked Questions (FAQs)

  1. What is CST? Mirrors concentrate sunlight to generate high‑temperature heat stored in TES.
  2. India’s CST potential? Approximately 6.4 GW.
  3. How does induction heating work? Alternating current creates a magnetic field that induces eddy currents, heating the material directly.
  4. Where are plasma torches used? Smelting, advanced ceramics, and other processes needing >1,000 °C.
  5. Why electrify industrial heat? To cut imported fuel dependence, improve energy security, and meet climate targets.

Prepared for UPSC Civil Services Examination – Current Affairs & Technology