Control Heat gains • In shops – Large heat gains from display lighting and refrigeration • In offices – From occupants and electrical equipment • In factories – From processes such as cooking, welding • In many lightweight buildings – Solar gains through thin walls and glazing
De-stratification fans • Useful for high ceiling premises with a large variation in temperature with height and a reasonably well insulated and air tight building
Tips for improving your heating system • Interlocked heating controls • Fast opening roller-shutter doors • Air curtains • Flexible doors
Heat Pumps • Air Source – coefficient of performance to 2 to 3 • Ground Source – coefficient of perf of 3 to 5 • Move heat rather than create it
Warm air distribution systems • May be HVAC system with gas boiler or ASHP – Some HVAC systems can be adapted to make use of free cooling (cold outside air) and excess heat internal to the buildings (e.g. server rooms) – Consult a specialist • Consider VSDs (Variable Speed Drives) for HVAC and circulation pumps • Ensure a dead band of 4 degrees C is set between heating and cooling
Boiler replacement and fuel switching Event supported by
Boiler replacement and fuel switching Understanding boiler efficiency • Knowing when to upgrade your boiler • Fuel switching and renewable heat incentive (RHI) •
Boiler Efficiencies • Many SMEs use smaller domestic style boilers • Check your boiler’s efficiency at www.ncm- pcdb.org.uk • All new boilers have to be A-rated (>90% efficient) • Any boilers pre 1997 are likely to be inefficient – consider replacing
Condensing Boilers • Have the highest efficiencies (>92%) • Recover extra heat from flue gases • Operate at lower flow temperatures (may need larger radiators) • Need careful installation in order to make sure they can operate in condensing mode • Need a condensate drain
Understanding boiler efficiency What do we mean by boiler efficiency? • (The % of input energy (fuel) that is output as useful heat) What is a good/bad efficiency rating? •
Knowing when to upgrade your boiler How efficient is my boiler? • Age? • Condition? Maintenance Costs? • Specialist analysis •
Fuel switching Consider switching if you are using a high price fuel • such as oil (but has reduced recently), LPG or electricity (day tariff). Alternatives are • Natural gas / Biomass • Air source heat pumps (ASHP), air-to-water only • Ground source heat pumps (GSHP) •
Renewable Heat Incentive Government funded subsidy for renewable heat • projects Paid quarterly per kWh of heat produced • Rate fixed at commissioning and then paid for 20 • years (index linked) Helps pay for higher costs of renewable equipment • Typical paybacks around 8-12 years •
Hotel : Oil to Biomass conversion Installation of biomass boiler without RHI: Cost of system = £110,000 Fuel saving = £5380 (£14,620 oil - £9,240 wood pellets) Payback = 20 years (£110,000/£5,380) Installation of biomass boiler with RHI: Cost of system = £110,000 Fuel saving = £5380 (£14,620 oil - £9,240 wood pellets) RHI (6.8p/kWh heat generated) = £11,615 (170,820 kWh X 6.8p) Payback period = 6.4 years (£110,000/(£5,380+£11,615)
Radiant Heat Heat • surfaces not space
Underfloor Heating
Exercise 2
Exercise 2 (15 minutes) Your organisation has a gas boiler that was installed in 1990. Your gas engineer estimates your boiler’s efficiency at 70 %. The engineer recommends upgrading to a gas condensing boiler with an efficiency of 92%, at a cost of £10k. How much energy and money would you save each year if you • upgraded? How many years would it take to for the investment to be repaid? • Key information: Gas costs: £0.04/kWh Current annual gas consumption: 150,000 kWh
Exercise 2 - Hints • Step 1 – Calculate current gas annual cost – Annual cost [£] = Annual gas consumption [kWh] x Unit Cost [£/kWh] • Step 2 – Calculate the current annual heating demand – Annual heat demand = annual gas consumption [kWh] * Boiler Efficiency • Step 3 – Calculate the new boiler consumption – New Annual consumption [kWh] = Annual heat demand [kWh] / New Boiler Efficiency • Step 4 Calculate the gas kWh saving, cost saving and payback
Green Network for Businesses Rebecca Worrall Assistant Manager, Scottish Renewables
Green Network for Businesses • Waste, water, energy and resource efficiency • More than 140 members and growing • Covers a range of industry sectors • Lead by example and share best practise “I sent in my loan application after visiting a local green business. It gave me the opportunity to ask questions to another business owner and I am now hoping to get a similar system.” Angus Fordyce, network visitor, 2014
Business events – be inspired Tuesday 3 March • Visit the Athletes' Village - built for Glasgow's Commonwealth Games 2014; followed by The Glasgow House , a pioneering project to design affordable homes with lower energy demands. • Visit Glasgow Recycling and Renewable Energy Centre - innovative recycling facility, with waste to heat energy production, that enables district heating; followed by Ibroxholm Oval , a progressive, energy efficient apartment complex from Lowther Homes. Raw materials
Heating technology showcase - Saturday 14 March, Fintry • Wood-fuelled heating (wood chip/pellet boilers) • Insulation measures and LED lighting • Heat pumps Water Raw materials
Website for Green Network for Businesses • Searchable map by business type, sector, technology and measures • www.resourceefficientscotland.co m/green-network-businesses • Or contact us directly on businessnetwork@resourceeffice ntscotland.com
TURNING WASTE INTO PROFIT Presented by Forrester Adam Managing Director
OVERVIEW • Established 1945 • 24,000sq ft premises in Glenrothes Our services • Bespoke staircases • Luxury Handrails • Specialist Timber Machining • Specialist Woodturners
OUR CHALLENGE • Massive amount of wood waste • 40 Yard Skip – filled every fortnight • Costing £9,000 per annum and rising • Gas bill in excess of £4000 per annum and rising • Annual heating maintenance of £1-2000
OFFCUT SALES • One Man’s Trash is Another’s Treasure • Monthly offcut sale • Managed by retired Clerk of Works • Highly sought after by amateur and professional wood turners • Club mentality • Charity focus
OUR SOLUTION • 2 x WT15 hand-fired wood heater unit • Shredder • Briquette making machine • Total investment £42,500 • Resource Efficient Scotland Interest Free loan
OUR RESULTS • Waste bill reduced to zero • Gas bill reduced by 75% • Zero maintenance • Offcut sales generating £12,000 Gross Profit per annum • On target to sell £2,000 of briquettes in first year
THANK YOU Any Questions Find us online at www.haldaneuk.com @haldaneuk
Thermal efficiency Event supported by
Thermal efficiency Reduce uncontrolled air leakage • Improve the thermal performance • of building fabric
Reduce uncontrolled air leakage Doors • Windows • Other draughts • Check ventilation levels • are correct for current activities
Reduce uncontrolled air leakage Consider LEV (local extract ventilation) for • dusty or fume filled environments to reduce heat losses
Consider mechanical heat recovery Air-to-Air heat exchangers can save up to • 50% of heating consumption
Improve the thermal performance of building fabric Roof • Walls • Windows • Floors •
Improve the thermal performance of building fabric Loft insulation • Under roof insulation • Beware of asbestos •
Improve the thermal performance of building fabric • Cavity wall insulation • Check condition of wall for exposed locations
Making a business case Event supported by
Building the business case Two questions from your finance department/boss/MD: 1.How much is all this going to cost us? 2.When do we get our money back? And the other questions they should be asking: 1. Any other H&S considerations 2. Any other benefits?
Building the business case 1. How much is all this going to cost us? a) Rough estimate – pricebooks on the internet, SPONS b) Resource Efficient Scotland or specialist survey c) Quotes from contractors or suppliers. Resource Efficient Scotland can help you to review quotes and any assumptions made
Building the business case 2. When do we get our money back? PAYBACK INTERNAL RATE OF RETURN NET PRESENT VALUE
Building the business case: payback Simple Payback Period: The amount of time in years that it takes for an investment to • be repaid by the savings it achieves Ignores maintenance costs • Ignores savings through improved longevity (as long as the • payback period is less than the expected life of the equipment)
Building the business case: Net Present Value Net Present Value: Better for large investment or longer term projects • Sums the cash flows in each year • Discounts the value of money in the future •
Building the business case: payback Cost of measure = X Years Simple Payback Period = Savings achieved per annum
Building the business case: Net Present Value Useful for large investments • Discounted Year Cashflow Year Cashflow and/or long payback periods Useful for comparing • Year 1 -6000 Year 1 -6000 Year 2 1300 Year 2 1300 projects with different Year 3 1300 Year 3 1235 lifetimes Year 4 1300 Year 4 1173 Choose the number of years • Year 5 1300 Year 5 1115 that you evaluate a project Year 6 1300 Year 6 1059 over Year 7 1300 Year 7 1006 Year 8 1300 Year 8 956 Year 9 1300 Year 9 908 NPV 2751
NPV Discounted Cashflow £2,000 £1,000 £- Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 -£1,000 -£2,000 -£3,000 -£4,000 -£5,000 -£6,000 -£7,000
Building the business case: worked example Replace gas boiler for a single-shift factory 50 wks/yr 5 days/wk Improvement measure: Gas Boiler Replacement Existing New Gas Cost £6,000 £4,250 Boiler Efficiency 70% (estimated) 92% quoted Gas consumption 150,000 114,000 Heating Demand 105,000 105,000 Boiler cost £10,000 Gas unit cost £0.04 £0.04 SAVING £1440 + maintenance cost improvement Simple Payback period 6.9 years
Building the business case: summary Rationale • Description of the measure • Costs including quotes • Payback or NPV • Any other benefits • Any H&S considerations •
Get funding Advice and support on 0808 808 2268 • New Guide • ‘Sources of finance - How to fund your resource efficiency Projects’
Q&A and Next steps
Q & A
Advice and support We provide free , specialist advice and one-to-one support to help decision makers in business, public and third-sector organisations cut their energy, water and raw material costs 0800 808 2268 www.resourceefficientscotland.com
E-LEARNING Green Champions Training Free online training for your • environmental team Bite sized modules teach latest resource • efficiency knowledge and practice Certificate on completion • Ideal lunchtime learning • 'Great course for businesses that want to learn about resource efficiency at their own pace. I highly recommend this course” Seamus Corry Assistant Manager | Cloybank
The Resource Efficiency Pledge Helping your business to plan, inspire and take action, so that you can reap the benefits of improved resource efficiency. motivate your staff and senior management , and bolster their commitment to achieving your business’s environmental goals focus your efforts on a clear set of achievable performance improvement actions get the recognition you deserve from employees, customers and wider stakeholders
VIBES Objectives • Encourage improved environmental performance • Enhance the competitiveness of organisations • Support the wider goals of sustainable development
VIBES Partners and Supporters Partners Supported by
VIBES 2014 Sponsors Sponsors
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