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Combined Heat and Power plants – carbon AND cost saving? Daman Ranby – Director Ashley Allsop – Head of Sustainability. Overview. Increasing Fuel Costs Part L of the Building Regulations 2010 Corporate Social Responsibility Energy Reduction Initiatives Marketing Opportunities

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Presentation Transcript
slide1

Combined Heat and Power plants – carbon AND cost saving?

Daman Ranby – Director

Ashley Allsop – Head of Sustainability

slide2

Overview

Increasing Fuel Costs

Part L of the Building Regulations 2010

Corporate Social Responsibility

Energy Reduction Initiatives

Marketing Opportunities

The Bottom Line!

slide3

Combined Heat & Power – The Basics

  • A “Generator” of Electricity & Hot Water
  • For Reciprocating Engines:
    • Fuels - Natural Gas, Bio Oil & Bio Gas
    • Electrical Power Outputs up to to 10MW

>30% Electricity

Engine

100% Fuel

50% Heat

<20% Losses

slide7

Power Station Mix

Grid Losses

50% Electricity

45% Electricity

100% Fuel

Combined Heat & Power – The Basics

The UK Electricity Grid Mix <45% Efficient

Grid Electricity Generation produces 0.517Kg/CO2/kWh

Expensive Energy 10pence/kWh

Waste Heat

slide8

Combined Heat & Power – The Basics

“The basic principle of CHP is that you generate high cost electricity using low cost gas with less emissions”

slide9

Power Demand

Heat Demand

Combined Heat & Power – The Basics

CHP

Gas Boiler & Grid

100KW Heat

20Kg CO2

100KW Heat

25Kg CO2

100KW Power

20Kg CO2

52Kg CO2

100KW Power

50KW Losses

150KW Losses

10Kg CO2

Included

Total 50Kg CO2

Total 77Kg CO2

slide10

When to Consider CHP

At the beginning of a project

Installing new boiler plant.

Replacing/refurbishing existing plant.

Reviewing electricity supply.

Reviewing standby electrical generation capacity or plant.

Creating Heat Islands – Consider your neighbours!

slide11

How CHP Integrates Into Your Factory

Island or Synchronised Mode

Single/Modular Lead CHP covering base heat profile

Usually Heat Led

Additional plant space

Acoustic treatment of plant spaces

Piping Modifications

slide12

CHP Operation Extended

CHP Hours

CHP Hours

Base Heating Load

Hot Water Load

Time

slide13

Case Study - Background

Feasibility Study completed

Need for replacement steam boiler plant

Site hot water demand 8000 Litres per hour

Electricity demand always above 800KVA

Site operation 24/7

CHP allowed to run 8000 hours per year

Capital Purchase agreed

slide14

Case Study - Plant

CHP Plant

Gas Input 2500kW

Electrical Power 930kWe

Thermal Output 1300kWt

Installed cost, approx. £1m

slide15

Case Study - Fuel

Fuel Inputs

Natural Gas – 2500 kW x 8000 hours = 20,000 MWh

Cost of Gas Used = 20,000 MWh x 3.5p = £700k

100% Fuel

slide16

Case Study - Outputs

Outputs

8000 hours x 930kWe = 7,440 MWh

Value of Electricity Produced = 7,440 MWh x 10p = £744k

Climate Change Levy Avoided 7,440 MWh x 0.485p = £36k

8000 hours x 1300kWt = 10,400 MWh

Value of Heat Produced = 10,400 MWh x 3.5p = £364k

Climate Change Levy Avoided 10,400 MWh x 0.165 = £17k

Electricity

Heat

slide17

Case Study - Maintenance

Operating Costs

Maintenance 7,440 MWh x 1.5p = £111k p.a.

CHP down time costs?

slide18

Case Study - Returns

Financial Summary Per Annum

Gas Input £700k

Maintenance £111k

Electricity (£744k)

Heat Output (£364k)

Less CCL (£53k)

Total Approx. Saving (£350,000)

slide19

Case Study

Case Study - Investment

Capital £1M

Savings p.a. (£350k)

Total Approx. Payback 2.8 years

Return on Investment ROI 35%

CO2 Traditional Route 5,905 tons

CO2 produced by CHP 3,960 tons

slide20

Pros & Cons

Over-sizing Plant

Reduced operating hours

Life Time Costs, Servicing, Shutdowns

Good Quality CHP - CHPQA – CCL Exempt

Attracts Enhanced Capital Allowances

slide21

And Finally…..!

  • Correctly Designed CHP will –
    • Reduce CO2 emissions
    • Reduce running costs
    • Promote CSR
    • Improve the bottom line!
slide22

Questions

Daman Ranby

Office 01159 758595

Mobile 07871 545566

Email [email protected]

Useful websites and Documents

Useful websites:

www.chpa.co.uk; www.carbontrust.co.uk

www.CIBSE.co.uk

CIBSE AM12

GPG388

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