Energy Check in Superbrugsen, Samso 18 Sep 2014 Michael Kristensen and Jan Jantzen mk@energiakademiet.dk www.night-hawks.eu IEE/12/671/S12.644734Duration: 1.4.2013-30.9.2015 The sole responsibility for the content of this publication lies with the authors. It does not necessarily reflect the opinion of the European Union. Neither the EACI nor the European Commission are responsible for any use that may be made of the information contained therein.
OVERVIEW 2
Annual Consumption Category Consumption (units) Costs (direct EUR, without subscriptions) Electric 615.000 kwh 98400 District heating 154.000 kwh 13100 Water 600 m3 5500 Total 117000 3
The consumption is higher than normal Normal (N) kwh/m 2 /yr Actual (A) kwh/m 2 /yr Electric 235 384 1.6 District heating 77 96 1.2 A/N http://energiwiki.dk/index.php/n%c3%b8gletal_for_bygninger_-_elo_n%c3%b8gletal 1600 m 2 4
Electric energy balance 5
Smart meter readings, electricity Aug 2013, NRGi From graph: Nightly consumption is 37 kwh/h (coolers, freezers, cold rooms, and pumps) per hr Assume nightly consumption is 37 24 365/615000 or 53% of the annual consumption 6
Opportunity for nightly setback Open every day, closed 20 8 all year, or 50% Baker arrives about 5:00, butcher a little later Cleaning lady decides herself, sometimes at 22:00 7
Result of hard advices 8
Soft advices Advice Train personnel Avoid standby during the night Choose emergency exit signs with low consumption. Choose lamps with daylight controls. Install digital thermostat valves on radiators Motion sensor on lights in backroom, lunch, toilets Use LED in lamps directed into coolers/freezers Install dayligt control of lamps in the entrance Use fewer light tubes and better reflectors in the entrance Dismiss some of the halogen lamps Replace halogen with LED Switch tubes off above shelves, bottle coolers and beam by the cashier Install freezers with a lid, lid for 2 end boxes Install on/off timer for the liver pate heater Cost 40-150 EUR < 25 EUR 65 EUR extra per sign 650 EUR per lamp. 650 1000 EUR for 5 valves 9
COMFORT HEATING / COOLING 10
Food heater Temperature setting 80 C Advice: Install on/off timer so that it is definitely OFF during the night 11
Butchery Temperature set at 14 C (57 F) After work: 10 C (50 F) Advice: Raise to shop temperature after work hours. Advice: Lower the temperature in the surrounding shop. 12
Action: Adjust the temperature in the butchery f = 46 % Week before Action Week after 13
Action: Lower the temperature in the shop Before: T_ = 19.4 C (66.9 F) After: T_ = 19.1 C (66.4 F) 14
http://www.night-hawks.eu/training/online-course-energy-checks-in-shops/online-course/ Calculator: Lowering indoor temperature 1 degree saves 8.8 % 15
COOLERS, FREEZERS, HOT WATER 16
Bottle coolers 9 display coolers Timer ON: 07 18 Advice: Tweek to a shorter ON period Advice: Raise low temperature to 9 C 17
Nightly setback The temperature inside was measured with a datalogger (Lascar EL-USB-2+). The timer switched OFF just after 18:00 and ON after 7:00 the following morning. The timer saves 13 %. 18
Datalogger: temperature and humidity Lascar Easylog USB-2+, 90 EUR, accuracy ±0.3 C 19
Calculator: Temperature setback in a bottle cooler 20
LIGHTS 21
Levels of illumination Location Measured [lx] EU norm [lx] Coolers 700 300 Between rows 550 300 Freezers 650 300 Cash area 1000 500 (1000 i Germany) Handheld lux meter (Testo 540). 22
Lights Advice: Lower average illumination from 650 to 550 lux Advice: Remove one tube from each luminairy, they are very close together Comment from manager: bright lighting is very important 23
VENTILATION 24
The ventilator disturbs the temperature in the butchery. Close the door, switch off after use. Before Action After 25
Note about ventilation If the ventilator speed is lowered to 1/2, then the electric consumption will be (1/2) 3 = 1/8. Therefore: small change, large effect! Advice: Avoid full speed, and do remember to switch off after use. 26
Learning opportunites Informal 1-to-1 teaching Classroom teaching Online calculators (da, en, fr) Online handbook (en, sv) Online self-study course (en) www.night-hawks.eu/denmark www.night-hawks.eu/training 27
DATA 28
Publicly accessible database (BBR) Built 1991 1594 m2 total (135 m2 office + personnel) Distric heating 0 shower rooms, 3 toilets Kitchen Goods reception: 334 m2, unheated 29
Other data Shop area 1221 m 2 Average outdoor temperature during the heating season 6.4 C Average outdoor temperature during the cooling season 17 C 30
Estimated energy balance 31
What is the price of the first saved energy unit? Electric, with tax: 1.8 DKK/kWh Electric, without tax: 1.5 DKK/kWh Electric, without tax, without fees: 1.2 DKK/kWh Distric heating, without tax: 640 DKK/MWh Water, without tax: 68 DKK/m3 32
Control unit settings for heat pump Superbrugsen Indstillinger af temperaturstyring (Lennox) Slagter Før Nu Start A: 06:00 06:00 ma-fr - B, C, Uno 18:00 14:00 ma-on - B, C, Uno 18:00 17:00 to-fr Start A: 06:00 06:00 lø - B, C, Uno 16:00 14:00 lø A,B,C, Uno 22:00 22:00 sø Zone A setpunkt 14.5 13.5 gr min FA 0% 0% Zone B setpunkt 14 13.5 gr min FA 10% 0% Zone C setpunkt 14 13.5 gr min FA 10% 0% Zone Uno 10 16 gr min FA 0% 0% Bms (?) 14 13.5 gr min FA 10% 0% Butik Zone A: setpunkt 20 19 gr Zone A: start, hverdage 06:00 07:00 Zone B, C, TZs: start 20:00 18:00 Zone A: start, lø-sø 07:00 øvrige zoner: start 17:00 Zone A, B, C setpunkt 20 19 stop (=TZs?), setpunkt 17 17 33
Control unit settings for district heating (Siemens) Day period, remainder has nightly setback Week day, 1 = Monday Clock Manual setting of room temperature 34
The Night Hawks partners Coordinator: Energy Agency for Southeast Sweden www.energikontorsydost.se Lena Eckerberg Tel: +46 734 40 82 75 lena.eckerberg@energikontorsydost.se Partner Organisations Country Website Prioriterre France www.prioriterre.org Severn Wye Energy Agency UK www.swea.co.uk Ekodoma Latvia www.ekodoma.lv Samsø Energy Academy Denmark www. energiakademiet.dk Stratagem Energy Ltd Cyprus www.stratagem-ltd.com Sächsische Energieagentur SAENA GmbH Germany www.saena.be C.R.A.CA SOC. COOP Italy www.craca.it 35