Presented at: Kingsley’s Woolloomooloo Presented by: Ben Pearson & Dan Butt Date: 8 August 2011 Energy Efficiency for Commercial Kitchens

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Work book 1 / Session 1 Funding Support This project has been supported by the NSW Government as part of the Energy Efficiency Training Program – visit savepower.nsw.gov.au

Work book 1 / Session 1 Coffee Machines When does yours get turned off?

Debunking the Myths Coffee machine group heads have to stay constantly hot to produce a good cup of coffee (Watermark training centre) Coffee machines use a lot of energy when heating up Seasoning coffee machines by pouring a few shots of coffee through the group heads before service will heat the heads and allow production of great coffee Can also put group handles into the coffee machine to heat up each morning Heating water each morning does cause a spike in energy use but this is negligible compared to the energy consumed by an element running 24/7

Debunking the Myths It takes too long to heat to temperature if machine is turned on every morning (Watermark training centre) Elements will burn out faster if machine has to heat up from cold each morning In a properly maintained machine with sufficient water supply, turning the element off over night greatly reduces the workload and potentially increases longevity Any machine taking longer than min to heat up should be serviced as there is probably another problem with the machine For example Lime scale build up on the heating element

Why turn them off? ( Reduce the equipment workload Minimise the cost of maintenance, particularly build up of scale on elements Avoid accidents – numerous reports of flooding incidents caused by pipe blockages or pipe failings over night Reduce energy use; To save you money!!

Idle energy used to maintain water temperature overnight Case Study : Coffee Machines Coffee turned on each morning Total energy = 20/60 x 5 kW = 1.67 kWh Coffee machine left to run over night Total energy = 12/60 x 8 h x 5 kW = 8 kWh Switch Off Overnight Save $400 a year Switch Off Overnight Save $400 a year

Work book 1 / Session 1 Start Up & Shutdown Schedules Spikes in electricity use between 10pm-7am? Highlights Importance of Shutdown Procedures

Work book 1 / Session 1 Using Timers & Controls : Combi Ovens Rate of idle energy consumption is important Importance of different Cooking Modes Like fryers, combi ovens spend a lot of their ‘ON TIME’ in idle mode

Work book 1 / Session 1 Understanding Your Appliance Manual Mode Self- Cooking Centre Idle Energy Rate (MJ/hr) Annual Energy Use (MJ) 85,03326,480 Total Annual Operating Cost ($) $1,700$530 Assumptions: Days/Op: 260, Hrs/day: 8, #/food/d: 200, gas utility cost: $0.02/MJ Rational SCC 62G Idle in Self-Cooking Mode Save $1,170/yr Idle in Self-Cooking Mode Save $1,170/yr Self Cooking Control vs. Manual Mode (Rational’s SCC Combi Ovens) Importance of Programming

Work book 1 / Session 1 Convection vs Combi Mode Energy Idle Rate (kWh)Water Rate (litres/hr) Convection Mode Combi Mode

Limescale Buildup Clean elementElement encrusted with limescale British Water: A 1.6mm coating of limescale on a heating element can make it up to 12% less effective A build up of 5mm reduces efficiency by over 40% Soluble calcium bicarbonate ions are converted to insoluble carbonate (limescale) when water temperatures reach 70 ° C This limescale then fixes itself to heating elements

Work book 1 / Session 1 Maintain Door Seals

Work book 1 / Session 1 Secure Oven Doors Note: Oven in Convection Mode Door Ajar 12 % Increase in Idle Energy Rate Door Ajar 12 % Increase in Idle Energy Rate

Work book 1 / Session 1 Appliance Efficiency Tips 1.Start up and shutdown procedures need to be carefully tailored to individual kitchens 2.Non-thermostatic devices are ideal candidates for start up and shut down procedures 3.Use appliance timers and controls to reduce idle time and energy wastage 4.Maintain oven door seals and ensure doors are always kept closed