CHP

Combined Heat & PowerBy Mark Foley

1Combined Heat and Power is the generation of electricity and usable heat simultaneously from the same fuel input.

Electricity primarily used on-site, but can be sold back to grid.

Thermal energy used for heating/cooling or process applicationsCombined Heat and Power

2Large Scale

Small Scale

Micro

Types of CHP

3Generation of electricity while using heat produced.

Higher efficiency

Use of waste or byproduct fuel

On-site electric generation avoids distribution costs (7%)

Increased reliability and power quality

Advantages of CHP

4Must be Simultaneous Demand for Heat & Electricity

Large Capital & Maintenance costs.

Require back up of power and heat

Noise from CHP unitsLimitations of CHP

5Prime MoversGas TurbineSteam Boiler/ Steam Turbine

6Spark Ignition up to 4 MW

Compression Ignition 15 MW

Exhaust Gases around 400C

Water or Lubricating oil Systems (70 -80C)

Ratio of 2:1

Reciprocating Engines

Spark IgnitionCompression Engine

Stirling Engine

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Summary of Prime MoversElectrical Output (Mwe)Typical FuelsPrimary Energy Savings (%)Gas Turbine0.5 >Flexible Up to 30Steam Turbine0.5 >Flexible 5 to 20Spark IgnitionUp to 4GasUp to 30Compression Ignition2 to 15Gas/ Heavy Fuel OilUp to 30Micro Turbines Up to 50 KweGasUp to 30Sterling Engines1 to 25 KweFlexible Up to 20Base load of Heat & Power exceeding 4000 hours yearly

Base Electrical Load

Base Heating Load

Hotels

Nursing/Residential Homes

University Campuses

CHP - Applications

9CHP can help deliver the green agenda

Development of more efficient technologies

Buildings & Industries can reduce carbon footprint

Still a large capital cost

Future of CHP

10Design of CHP system for the buildings use.

Reducing CO2 emissions from buildings.

Task for BSE to design and produce these types of efficient systems.

Conclusion

11Thanks For Your Time

Questions?

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