Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Technology Category/Market
Category – Energy infrastructure/ Automotive
Applications –Clean energy , energy conservation, power generation, engines , turbines
Industry – Power generation , Automobiles
Market –The Global Power Generation Market size was valued at around USD 1,593.84 Billion in 2022 and is projected to reach USD 2,111.80 Billion by 2030, growing at a CAGR of 3.59% from 2024 to 2030.
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Problem Statement
- Conventional two-stage cascaded systems offer simplicity with a single organic fluid and improved heat extraction from multiple heat sources and are only effective under specific heat source conditions.
- Existing ORC architectures are either complex with extensive heat exchangers, making them less economical, or they have low thermal efficiency and performance.
Technology
The main components include:
Fluid Tank: Holds the organic fluid at both high pressure (HP) and low pressure (LP)
LP Pump : Circulates the organic fluid throughout the system
First Loop: Performs supercritical evaporation of the organic fluid to produce supercritical vapor
Second Loop: Performs sub-critical evaporation of the organic fluid to obtain subcritical vapor.
Two-stage Expander: Converts the mechanical energy from the trans-critical expansion of the organic fluid into electrical energy for power generation.
Regenerator: Recovers energy from the superheated vapor resulting from the trans-critical expansion of the organic fluid.
Condenser: Condenses the superheated vapor of the organic fluid into a saturated fluid after power generation.
Key Features/Value Proposition
Technical Perspective:
- Two Stage Regenerative Organic Rankine Cycle (ORC) with improved power outputs using trans-critical evaporation and regeneration stages
- The combination of supercritical heating in the HP stage and partial evapouration and regeneration in the LP stage can improve thermal match and also achieve increased heat source utilization
- Further, the regenerator can take various forms, including a direct mixing vapor generator, an ejector, or a recuperator, and is used for energy recovery from the superheated vapor and two-phase organic fluid
User Perspective:
- Improved thermal efficiency, improved regeneration without using additional heat exchanger, reduced superheat in the condenser inlet.
Questions about this Technology?
Contact for Licensing
Research Lab
Prof. Satyanarayanan Seshadri
Department of Applied Mechanics
Intellectual Property
- IITM IDF Ref. 1974
- IN202041008106
- PCT/IN2021/050178
Technology Readiness Level
TRL-2
Technology Concept formulated