Master Classes: How to use the waste heat from electricity generation, greater than total supplies of domestic gas, to decarbonise our cities with Energy Hubs and keep our lights on.
Hosted by: William R H Orchard MA (Oxon) MBA CEng FIMechE MCIBSE MIET FEI with a panel of experts to show you how to model and design to retrofit our domestic sector to heat networks. Review of the GLA’s District Heating Manual and CIBSE AM12.
Venue: Prince Phillip House, 3 Carlton House Terrace, London, SW1Y 5DG
Date: Thursday 30th May 2013 Time: 9.30am - 1pm and 2pm – 5pm
Price: £45 + VAT per session, Press and Government Officials contact organiser for free tickets.
Register at:
http://districtheatingforlondon.eventbrite.co.uk/
Waste heat from electricity generation is greater than our supply of gas to our domestic sector. Upgrading this heat with Combined Heat and Power (CHP) uses one unit of electricity to deliver 10 to 12 units of heat – a ratio known as its coefficient of performance (COP). Denmark expects to meet Carbon targets with CHP and without Nuclear. Building District Heat now, will allow us to use the waste heat from Nuclear to heat Cities. The advantage is that you only need one third of the capacity. Nuclear CHP produces 12 units of heat per unit of electricity. Domestic electric heat pumps only produce four.
Hubs and district heat are compatible with 2050 scenarios for hydrogen, biogas, electric heat pumps, solar thermal, and heat storage as well as large scale CHP burning waste, biomass and fossil fuels fitted with carbon capture and storage (CCS).
The vision is radical. Thousands of Energy Hubs delivering low temperature district heat from low CO2 sources - CHP, biomass boilers, electric directly driven heat pumps and solar thermal.
The Vision is:
- Future proof - consumers will get the most out of whatever fuel or source eventually supplies heat, power and transport services.
- Provides security of supply, to cover conditions when electricity or gas transmission fails.
- Backs up wind to allow expansion of renewables.
- Avoids massive cost of reinforcing the electricity distribution infrastructure to feed individual domestic heat pumps.
- Provides least cost solution for electrification of transport and dual use of batteries for electricity network management and vehicles.
- Ensures carbon savings short-term and long term.
- Minimise residents cost and disruption to meet Code Level 4 because low CO2 heat supply decarbonises all heat loads, domestic hot water, ventilation, fabric. Insulation only affects the fabric load.
Background to Modelling Master Class - Some modellers allocate benefits from CHP to electricity consumers and others to heat consumers. The European Emissions Trading Scheme (EUETS) and EMR view use of waste heat as reducing emissions for electricity consumers, Dukes splits the benefit. William will explain why there is no benefit for electricity consumers from CHP apart from security.
A method of analysing CHP on the same basis as electric heat pumps will be recommended, which is consistent with treating CHP as a virtual heat pump. A principle echoed by Professor Robert Lowe, William Orchard (WO), Professor David Mackay and Paul Woods in CIBSE Guide AM 12. The method applies to CHP’s feeding common heat and electricity networks to meet domestic hot water loads.
The workshop will explain why the EU must treat heat from fossil CHP as renewable, when it has a lower carbon footprint, than heat from electric heat pumps using fossil electricity.
The objective is a common basis for analysing CHP so that results from models can be readily compared. The alternative is for DECC, ETI, CCC, and other models from consultants advising on energy policy to be in the public domain so their assumptions are transparent and can be questioned.
9.30 Modelling for CHP Master Class - Chair: Senior DECC Modeller (invited)
9.30 Peak Load CHP, Hubs Now - CCS and Nuclear CHP Later - WO
The Hub Vision explained. Modelling of CHP and its effect on policy.
Do electricity consumers or heat consumers benefit from district heat and CHP?
Benefit of Hub’s for Electricity Networks - Liam O’ Sullivan, Programme
Director, Low Carbon London
11.00 Coffee
11.30 EU Modelling Directive, Renewable CHP & Exergy. Why is Heat from Fossil Fuel
CHP not classed as Renewable when it has a higher COP than Electric Heat Pumps?
David Andrews, Former Advisor EU Research Centre Petten, WO,
Dr Audrius Bagdanavicius CSci MEI Cardiff University.
11.50 Panel Discussion –Review of Modelling Methods and their Assumptions.
WO, Bob Ashley, Mott McDonald. Paul Woods, Aecom, Mark Barratt UCL.
Delta Energy, Mahmoud Abu Ebid AEA (are invited)
Voting: Cost Optimal Modelling Method for CHP Policy?
Value Optimal for CHP Operation?
Voting: Should we treat CHP and Electric Heat Pumps Equally for RHI and Green Deal?
1.00 Lunch – light refreshments provided.
Afternoon Session 2pm – 5pm For Engineers who will implement the Hub vision with practical steps to convert urban areas heated with individual gas boilers to district heating.
2.00 Design for Retrofitting - A District Heating Master Class
Chair: Peter North (PN), Greater London Authority Decentralised Energy Team.
Speakers: William Orchard (WO), Paul Woods (PW) Aecom, Huw Blackwell (HB) Hoare Lee, Robert Hyde (RH,) Bill Rowe Integrated Energy |Utilities (BR) (invited) and other experts will review whether the HUB design parameters should be adopted by the 'District Heating Manual for London' issued by Boris Johnson & CIBSE Guide to CHP in Buildings AM 12 for the Domestic UK Heat Load.
Hub Concept Review - WO - Large scale CHP COP and network temperature, RH -Waste
Opportunity, PN - Peak load CHP Hub and Heat Pump, WO & HB - Fuel store, heat store,
battery store. Electricity and heat supply security. Battery exchange infrastructure benefit.
Schematics for Condensing CHP Hub, WO.
Heat Network Piping - Piping types steel plastic temperature and pressure, PW, WO & HB - Piping Routes - Kerbstone route, WO - Insulated Wall route, PS - Back garden route. What will be least cost, or least disruptive route for piping? Network dwelling interface - Heat exchange or direct connection for heating? PW, HB & WO. Connection size, instantaneous heat interface units for domestic hot water (DHW) – cylinder storage DHW. Leaks, water supply and district heat.
Interface Tariffs - Heat metering? Exergy metering? Volume metering? No metering? WO, PW & HB. What system can minimise overall costs for consumers?
3.30 Tea.
Within the dwelling:
Heat Emitter retrofit: Why raising flow temperatures to radiator increases condensing minimising fuel and other losses. Heating outside air with return to increase radiator output, WO.
Retrofit control options and schematics heat emitters. Heat emitter operating temperatures, WO, PW&HB - Domestic hot water, temperatures, Legionella, return water temp, stratification, HB & PW. Clean Heat Provision Ltd Exergenius DHW unit.
Meeting CO2 targets optimal investment. Heat network supply or fabric first?
Review balance between low CO2 heat supply decarbonising fabric domestic hot water and ventilation loads and fabric improvement, only reducing part of the load. Conceptual Framework for Discussion. When heating cars in winter, CHP on wheels, we do not use more fuel so our costs do not change. There is no economic case to increase the cars insulation. Housing supplied with heat from CHP is similar. It warrants insulation as heat from CHP has a CO2 footprint and a cost. How much insulation is optimal?
5.00 Close
About the Host -
William R H Orchard MA (Oxon) MBA CEng FIMechE MCIBSE MIET FEI Managing Director of Orchard Partners London Ltd will lead this event which presents the findings from an EU funded Ecostiler project optimising heat networks CHP and other low CO2 heat sources.
His national energy policy work with IC-consult, FES/AEA, London Economics, Tebodin, ERM, and Power Planning Associates meant he found severe limitations in a number of models for CHP such as WASP and Markal. William is the Combined Heat and Power Associations first chairperson and used to advise the Select Committee on Energy. He recognises how integration of heat gas and electricity networks can provide benefits for all the current players in the market but only if the rules of the current national heat and electricity supply game are changed.
William co-authored BSRIA guides on CHP and variable flow heat networks he also served on the standards committee for underground pre- insulated piping which includes the sandbox test he invented. His firm has designed and upgraded heat networks and retrofitted estates of up to 2300 dwellings as well as hotel and other buildings. A paper to the 11th International Association of Energy Economists European conference in Vilnius outlines his analytical methods. William combines practical hands on approach to engineering and is happy to balance friends’ heating systems. His early experience as an apprentice and milling machine operator, later managing engineering factory areas, excited his interest in developing new and better products for district heat and CHP. Skiing, fishing and surfing are some of his other interests.
Ecostiler GMP and Sizewell Enquiry - William has worked with Chris Dunham of Carbon Descent since 2005 on the Ecostiler project where other London Partners were Southwark and London South Bank University. Lambeth subsequently took over Southwark’s part of the project and Southwark became an observer when they decided to demolish the Aylesbury Estate instead of refurbishing it. I am grateful to Chris and Carbon Descent for the opportunity to work with them and their software such as Engine Room and EnergyPRO (which they are UK agents for) that was used for evaluating options for hubs for the Hyde Farm area.
The Directors of Global Media Publishing Richard Teasdale and Neb Saric who are providing the venue visited Odense to see how its low density suburban housing stock on gas is now being retrofitted to low temperature district heat. Their support for the Ecostiler work reflected in the ticket prices is appreciated.
I particularly welcome two speakers, Paul Woods and Mark Barratt, who worked with me in the 1980s evaluating CHP and district heat for London as an alternative infrastructure investment to Sizewell. John Macadam of Povry who gave evidence is invited as guest. The returns for the district heat and Sizewell were similar at the time.
Today district heat will be more economic due to the amount of peak load generation we will need, that can be built as CHP to back up wind and meet peak electrical and heat loads. Low temperature heat networks utilising plastic pipes is a further game changer coupled with the “Exergenius” method for heating domestic hot water and its very low primary return water temperatures.
Thanks to Ken and Maggie, Orchard Partners missed out on heating London then. CIBSE AM 12 points the way for our own engineers to do it even better than those who led the way in Europe.
William R H Orchard MA (Oxon) MBA CEng FIMechE MCIBSE MIET FEI May 2013
Delegates will have access to:-Ecostiler Report “Modelling of CHP its Effect on Policy. Do Electricity Consumers or Heat Consumers Benefit from District Heat and CHP?” and the Orchard CHP Convention in Excel for the morning session. Circuits for the Roupell Park 500kW CHP demonstration for active management by the local electricity network operator for mutual benefit will be tabled. One feature is the hydraulic control so the CHP carries the heat load in preference to the boilers as well as its ability to modulate and follow either heat load or electricity load.
This event evolved from feedback from two “Project Ecostiler” Workshops at the Institution of Mechanical Engineers in 2012. “Can You Trust Your Models?” and “So You Think Your Boilers Are Condensing!”