1. © Copyright DRD Power Limited 2010 DRD Power Ltd Electric Power Generation from Waste Heat Sources by Organic Rankine Cycle Clive Whitbourn CEng FIChemE Roger Mallinson CEng FIChemE 22 nd April 2010 New Ideas in Resource & Energy Efficiency - Peterlee

2. © Copyright DRD Power Limited 2010 Background o Energy & Resource Consultants o Energy Mapping & Audits – Project Identification o Renewable & Sustainable Technologies o Feasibility Studies DRD

3. © Copyright DRD Power Limited 2010 The Opportunity

4. © Copyright DRD Power Limited 2010 Organic Rankine Cycle Waste Heat Electricity

5. © Copyright DRD Power Limited 2010 Electricity savings ~£100kpa (200kW) CO2 savings = 700 tpa (200kW) Payback ~3 years Zero emissions Fully automatic No toxic substances Use of non-flammable refrigerants with low GWP Benefits

6. © Copyright DRD Power Limited 2010 Low temperature heat source, ie 90°C and above Innovative use of a compressor as an expander No intermediate heat transfer fluid Use of non-flammable refrigerants with low GWP ORC Innovations

7. © Copyright DRD Power Limited 2010 Refrigerant Research - complete Turbine Research - complete Detailed Design - complete Construction of 200kW Demonstration Unit Commissioning and Operation – Q3. 2010 Project Milestones

8. © Copyright DRD Power Limited 2010 Choice of refrigerant influenced by: –Environmental & Safety factors –Engineering –Thermophysical factors –Commercial factors Hydrocarbons, halogenated hydrocarbons, and ammonia/water were examined Both single component and mixed fluids were considered Refrigerant Research

9. © Copyright DRD Power Limited 2010 Ideally, use a mass-produced turbine for reasons of cost and availability No mass-produced turbines available, so a compressor run in reverse will be used Research identified any necessary modifications eg lubricant flow Turbine Research

10. © Copyright DRD Power Limited 2010 Rated 200kWe ORC Unit Modular Unit

11. © Copyright DRD Power Limited 2010 Waste heat sources >90°C Typical examples:- Low Pressure Steam 1 – 2 tonne/hr Process Vapours Hot Water/Condensate 40 m3/hr (min) Hot process streams requiring cooling Seeking Early Adoption Sites

12. © Copyright DRD Power Limited 2010 Feasibility assessment Estimate of electricity produced and value CO2 savings Potential for your Site

13. © Copyright DRD Power Limited 2010 Carbon Trust Shell Springboard award in February 2009 - innovation and carbon reduction NStar Finance Project Support

14. © Copyright DRD Power Limited 2010 Wilton Centre Wilton Redcar TS10 4RF Tel: 01642 430090 info@drdconsultants.co.uk Contacts: Clive Whitbourn Roger Mallinson DRD Power Ltd

15. © Copyright DRD Power Limited 2010 Temperature/Enthalpy Chart