Transcript DRD Power Ltd

DRD Power Ltd
Electric Power Generation from
Waste Heat Sources by
Organic Rankine Cycle
Clive Whitbourn CEng FIChemE
Roger Mallinson CEng FIChemE
22nd April 2010
New Ideas in Resource & Energy Efficiency - Peterlee
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2010
DRD
Background
o Energy & Resource Consultants
o Energy Mapping & Audits – Project
Identification
o Renewable & Sustainable Technologies
o Feasibility Studies
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2010
The Opportunity
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Organic Rankine Cycle
Boiler
Expander
Waste
Heat
Electricity
Preheater
CW
Condenser
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2010
Benefits
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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
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2010
ORC Innovations
• 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
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2010
Project Milestones
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Refrigerant Research - complete
Turbine Research - complete
Detailed Design - complete
Construction of 200kW Demonstration Unit
Commissioning and Operation – Q3. 2010
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Refrigerant Research
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Choice of refrigerant influenced by:
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Environmental & Safety factors
Engineering
Thermophysical factors
Commercial factors
Hydrocarbons, halogenated hydrocarbons,
and ammonia/water were examined
Both single component and mixed fluids were
considered
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2010
Turbine Research
• 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
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2010
Modular Unit
Rated 200kWe ORC Unit
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2010
Seeking Early Adoption Sites
Waste heat sources >90°C
Typical examples:•
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Low Pressure Steam 1 – 2 tonne/hr
Process Vapours
Hot Water/Condensate 40 m3/hr (min)
Hot process streams requiring cooling
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2010
Potential for your Site
• Feasibility assessment
• Estimate of electricity produced
and value
• CO2 savings
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2010
Project Support
• Carbon Trust
• Shell Springboard award in February 2009
- innovation and carbon reduction
• NStar Finance
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2010
DRD Power Ltd
Wilton Centre
Wilton
Redcar TS10 4RF
Tel: 01642 430090
[email protected]
Contacts:
Clive Whitbourn
Roger Mallinson
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2010
Temperature/Enthalpy Chart
Temperature / Enthalpy Chart
180
160
liquid
vapour
pump
preheater
evaporator
superheater
turbine
condenser
heat source
heat sink
Turbine power
Temperature (deg C)
140
120
100
80
60
40
20
0
200
250
300
350
400
450
Enthalpy (kJ/kg)
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2010
500
550