MRWE-002 IGNOU Guess Paper 2026-27

MRWE-002 Energy Storage: Guess Paper (Digital PDF) Term-End Exam (TEE) Preparation

This structured guess paper aligns with the official IGNOU curriculum for MRWE-002 (Energy Storage) and emphasizes high-yield topics from past exam patterns (2018–2023). It includes chapter-wise question distribution, 3-hour exam time management tips, and solved numericals from previous years.

Key Syllabus Blocks & Weightage

• Block 1: Energy Storage
  • Thermodynamic fundamentals of energy storage systems (50% weightage in TEE). Focus on latent heat storage and sensible heat storage calculations.
  • Commonly tested: Phase change materials (PCMs) and their thermal properties (e.g., melting point, enthalpy).
• Block 2: Hydrogen Energy Storage and Fuel Cells
  • Fuel cell types (PEM, SOFC, MCFC) and their efficiency equations (30% weightage). Prioritize Gibbs free energy vs. enthalpy problems.
  • Hydrogen storage methods: Compressed gas, liquid hydrogen, and metal hydrides (20% weightage).
• Block 3: Magnetic and Electrical Energy Storage Systems
  • Superconducting magnetic energy storage (SMES) and flywheel energy storage (FES) principles (25% weightage).
  • Common numericals: Energy density calculations for capacitors and inductors.
• Block 4: Thermal Energy Storage
  • Thermal energy storage (TES) materials: Rock beds, molten salts, and thermochemical storage (35% weightage).
  • Focus on exergy analysis and heat transfer coefficients in TES systems.

Exam Time Management Tips (3-Hour Format)

• Allocate 45 minutes for Block 1 (Energy Storage) and 40 minutes for Block 2 (Hydrogen/Fuel Cells).
• Spend 30 minutes on numericals (Blocks 1, 3, and 4) as they carry 40% weightage.
• Leave 15 minutes for review; prioritize short-answer questions (SAQs) on PCMs and fuel cell reactions.

Subject-Specific FAQs

• Q: Which topic carries the highest weightage in TEE?

  Thermal energy storage (Block 4) and hydrogen storage (Block 2) consistently appear in long-answer questions (LAQs) with 20–25 marks each.

• Q: Are diagrams mandatory for TEE?

  Yes. For Blocks 1 and 4, include schematics of PCM storage tanks and fuel cell stack diagrams for partial credit.

Sample Question Patterns (Based on Past Papers)

• Block 1: Calculate the energy stored in a 10 kg PCM with a latent heat of fusion of 200 kJ/kg at 60°C (expected in 2024 TEE).
• Block 2: Derive the efficiency of a PEM fuel cell operating at 80°C with a hydrogen flow rate of 5 L/min.
• Block 3: Compare the energy density of a SMES system with a lead-acid battery (numerical comparison).
• Block 4: Explain the role of molten salts in concentrated solar power (CSP) plants (theory + application).