Combined Heat & Power Systems

Transcription

1 CPD Approved Course Combined Heat & Power Systems Presentation by Tony McDermott

2 Agenda Introduction to ENER-G Group What is a CHP Why have a CHP CHP technical issues CHP finance options Case studies Conclusions Questions

3 ENER-G Group Activities Combined Heat and Power Local generation of cost effective ELECTRICITY and HEAT (and/or cooling) for commercial, industrial, public sector and district heating applications. Renewable Energy Developer and owner of biogas power generation. Landfill methane, coal mine methane, well head gas, digester gas and other bio gas.

4 ENER-G Group Activities Energy from waste Extracting energy from waste enables the diversion of waste from landfill and the immediate recovery of energy, displacing fossil fuel alternatives and reducing greenhouse gas emissions. ENER G offers sustainable Gasification and Pyrolysis technologies. Energy Management Using intelligent building controls and innovative technologies to provide risk free installations of Building Energy Management Systems. Energy savings, typically 30% - 40% - with no investment required.

5 Worldwide operations Headquarters Subsidiaries Joint Ventures Partners ENER G employs over 700 people worldwide with a turnover of c. 100 million (budget ) and operates over 365MW of electricity generation annually

6 Our customers

7 ENER G Combined Power Ltd Part of the ENER G Group of companies, based in Manchester Has own production/test facilities and dedicated service organisation Europe s market leader in small scale CHP and embedded generation provider up to 5MWe in size Enjoys approx 50% UK s domestic small scale CHP market 21 years as specialist CHP company Participated in over 700 schemes to date Ongoing involvement in over 500 operational sites with capital investment in 50% of these sites

8 What is CHP?

9 CHP Technology Combined Heat and Power or sometimes referred to as CHP or Cogeneration converts a single fuel into both electricity and heat in a single process at the point of use. An engine (normally gas fuelled) is linked to an alternator to produce the electricity. Heat is produced by the engine and this is collected from oil, jacket water and exhaust gases by heat exchangers.

10 CHP Technology Reciprocating Gas Engine ENGINE JACKET CONTROL PANEL GAS TRAIN ALTERNATOR BASE SKID EXHAUST HEAT EXCHANGER PLATE HEAT EXCHANGER

11 Production

12 CHP Installation Electrical interface Site Distribution network Site incomer 100 kw 200 kw 100 kw 50 kw 50 kw Site loads CHP 300 kw Leading edge development of clean energy projects

13 CHP Installation Simple boiler & CHP interface Flow Boilers Return ELEC CHP Leading edge development of clean energy projects

14 So..Why have a CHP? Leading edge development of clean energy projects

15 Why have CHP? Reduces running costs - Reduces sites actual energy costs - Avoidance of Climate Change Levy - Enhances Capital Allowances - Off-set capital expenditure for replacement boilers - Stabilizes energy costs over period of time Reduces CO2 emissions - Points for BREEAM assessment - ECOhomes - Legislative compliance with part L2 of building regulations. Security of supply - Acts as back-up generator - Back-up heat supply - Reduces dependency

16 CHP vs. Conventional Generation 100% Fuel 65% Waste 5% losses 30% Electricit

17 CHP Design Issues CHP should always be the lead boiler Best sites have year round heat demand Usually running 5,000 hrs/yr for economic viability heavily depends upon heat and power demand profiles Economics improve if standby generation or boiler replacement is considered Size to base load? (Optimum often greater)

18 CHP Design Issues A detailed feasibility study is essential Don t overestimate heat & power demands Low cost energy saving measures first Analyse a range of CHP types and sizes Consider all the practical issues carefully Assess all the environmental benefits/issues Use guidance from Action Energy & CIBSE

19 CHP Design Issues Optimum sizing of CHP Plant Base load selection Base load electrical with heat rejection Base load thermal with electrical modulation Selecting Plant Location Electrical Profile - Base Load Months Interface Engineering Thermal Mechanical Electrical Thermal Profile - Base Load Operational Hours/Availability Quality Index Months

20 Thermal Profile - Heat Rejection Months

21 CHP Design Issues PLANT LOCATION (Normally in boiler house) GENERAL ACCESS FOR SERVICING AIRBORNE NOISE VIBRATION ISSUES FLOOR LOADING EXHAUST PLANNING Ground Floor Good Easy to deal with Easy to deal with Not an Issue Careful consideration No (maybe flue) Mid Level Careful consideration Easy to deal with Careful consideration Careful consideration Average No (maybe flue) Roof Very Careful Consideration Easy to deal with Careful consideration Careful consideration Short exhaust Yes External Location Good Careful consideration Not an Issue Not an Issue Careful consideration Yes

22 Micro CHP product options Products at 4, 10 & 25 kwe Product has built in Heat rejection radiator Designed for external use Acoustic Enclosures - 62 dba at 1m 4 & 10 kwe units do not require G59 10,000 hr service intervals Suitable applications include - Small leisure centres - Nursing homes - Retail outlets Government Subsidy with the Feed-in Tariff

23 CHP Options Internal packages Fully contained packages <500kWe Modular blocks >500kWe Least expensive option Limited flexibility Greater level of site integration Lower unit build cost

24 CHP Options External packages Contained packages < 2 MWe Special acoustic housings Good flexibility Simpler site integration Lower noise options Planning issues

25 Financing Options Capital Purchase - Capital Purchase contract (turn key). - Annual maintenance contract - Comprehensive Maintenance based contract - Routine Maintenance based contract Discount Energy Purchase (DEP) - Simple electricity supply contract (per kwh) - No fees or capital expenditure Energy Services Performance Contracts - Enhanced DEP incorporating other energy plant Guaranteed Energy Savings Agreements

26 Capital Purchase Advantages - Most common form of purchase - 100% financial rewards retained by purchaser: - savings - enhanced Capital Allowances - Freedom in the choice of procurement option - Lower cost of capital - Need to enter into separate Annual Maintenance Contract Disadvantages - 100% of risks associated with the scheme - Procurement - Capital - Competition for internal capital funding could lead to project delays and rejection

27 D.E.P. Discount Energy Purchase Advantages - No/partial capital outlay - Faster route to scheme implementation and immediate savings - Avoids the need to compete with internal funding - Maintenance contract part of charge rate (p/kwhr) - Access to ECA that may not normally be accessed Disadvantages - Partial financial returns - Contract terms may be 5, 10 or 15 years

28 Case Studies Leading edge development of clean energy projects

29 Leisure Sector Next Generation Clubs 10 Clubs throughout the UK have an ENER.G 206 CHP installed on a 10 year DEP (Contract) basis Mixture of both internal and external containerised units Corporate CHP adoption policy Typical annual saving of c. 9,000/site Technical considerations Varying sizes of plant rooms required special consideration to M&E installation External containers as far away as 40m from boiler/electrical interface Noise constraints due to proximity of relaxation/therapy rooms and local housing

30 Sunderland Aquatics centre Operational since May 2008 ENER.G 185 Greenest 50m swimming pool in the country Financed by ENER-G on a 10 year DEP Carbon Savings of 539 tonnes equivalent to planting 53,900 trees. Typical savings under the DEP scheme of 31,548 per annum, when utilising all the heat and operating 17 hours per day.

31 Conclusions The CHP market looks very favourable Legislation Environmental awareness Energy prices CHP is a key part of government strategy but need more policies CHP is the single biggest hit on CO 2 and running costs Energy efficiency leads to better buildings We all have a professional responsibility to act!

32 Questions? Thank you for attending.