1. NET ZERO HOUSE Etienne Hentzen Mark Horgan Mark Lewis Grant MacGregor Darren Tannock

2. RECAP  Geometry finalised  Natural / artificial lighting analysis  Heating load  Electrical demand (incl. car)  Wind turbine selection  Solar panel selection

3. GANTT CHART

4. VENTILATION SYSTEM  Ventilation requirement  For comfort  Perceived indoor air quality : Category C  30% dissatisfied / 2,5 decipol  0% smoker  1 olf/occupant  Occupancy in space= 0,022 occupants/(m² floor)  Pollution load causing by the building = 0,05 olf/(m²floor)  Ventilation effectiveness = 1  Ventilation requirement  For comfort

5. VENTILATION SYSTEM  Ventilation requirement  From the building regulation 2010  Minimum dwelling ventilation rate = 0,3x floor area In our case : 0,3x180= 54 l/s= 194,4 m^3/h  We use this value to design our ventilation system  Use of a heat and recovery system  Supply ventilation rates

6. VENTILATION SYSTEM  Extract ventilation rates  Use of a cooker hood suitable for the heat recovery unit

7. VENTILATION SYSTEM

8.  HR unit: Ubbink HR G400  Data  Control:  Manually with a 3-way switch  Automatically with a remote control

9. HOME ENERGY MANAGEMENT  GEO Ensemble Energy Monitor.  Easy management of home electricity consumption as well as controlling home appliances. (image source:http://www.greenenergyoptions.co.uk/wp- content/uploads/2013/01/06-Ensemble-Front-Back.png)

10. HOME ENERGY MANAGEMENT  Smart plugs enable user to control appliances with the touch of a button.  Energy consumption displayed in real-time.  Consumption information shown in terms of cost, energy units (kWh) and CO2 produced. (image source:http://ecx.images- amazon.com/images/I/310TkxPAb8L._SS270_.jpg) (image source:http://www.greenenergyoptions.co.uk/wp- content/uploads/2012/09/02_Solo_I_PV.png)

11. WATER USAGE  Standard water use was calculated using South Staffs Water factsheet.  This value of 160l per day per person is much greater than values specified in the Code for Sustainable Homes. Standard Water Use Litres per use Use for 1 person per day Use for 4 people per Day Use for 4 people per weekLitres Per Week Hot Water Litres Per Week Shower4514281260 Toilet65201408400 Teeth628563360 Hand/Face2416112224 Washing Machine85003255 Dishwasher4214281176 Food Prep151214210 Car Wash35000.517.50 Gardening500000.31500 Miscellaneous250 Total4493.53125 Daily Average Per Person160.5111.6

12. ECONOMIC WATER USE  Using Restricted taps and low flow taps results in a saving of 50.6%.  Using Rainwater Harvesting results in a total saving of 65.8% water.  This means the water usage is lowered to less than 80l per person per day, scoring maximum points according to the code for sustainable homes. Low Water UseLitres per use Use for 1 person per day Use for 4 people per Day Use for 4 people per weekLitres Per Week Hot Water Litres Per Week Mains Water Use per week Shower (restricted Nozzle)31.51428882 Toilet Full Flush4285622400 Toilet Half Flush23128416800 Teeth (aerated tap)1.82856100.8 Hand/Face (aerated tap)0.641611267.2 Bosch WAQ28461GB40003120 0 Zanussi ZDT12002FA14.31428400.4 Food Prep (aerated tap)4.5121463 Car Wash35000.517.500 Gardening500000.315000 Miscellaneous250 Total2217.91633.41538.4 Daily Average Per Person79.258.354.9

13. RAINWATER HARVESTING  The system specified is the F-Line Diver 7500 from Rewatec  Using the system we save 65.8% on mains water.  The capture area is specified as the roof space, so 180m2 at 80% collection. MonthRainfall (mm)In (L)Out (L)Left in Tank (L) January60864031185522 February40576031182642 March40576031182642 April2028803118-238 May2028803118-238 June2028803118-238 July2028803118-238 August40576031182642 September30432031181202 October50720031184082 November40576031182642 December30432031181202 Total410590403741621624

14. RAINWATER HARVESTING

15. ACTIVE-OX CHLORIDE DIOXIDE DOSING SYSTEM  Kills Legionella and other harmful biological agents  Allows for reduction of water storage temperature to only 50˚C, instead of <60˚C temperatures conventionally required  Dramatically reduce hot water heating load, as tap water output of only 45˚C necessary

16. WATER TREATMENT - UV DOSING  IWE-SS75- Max flow rate of 60 L/min  75 Watts lamp power

17. THERMAFLOW COMBI-BOILER  99% efficient electric boiler  Input valve allows for input of solar thermally-collected water  TH12-330U MRK 2  £2,533.39  12 kW  330L

18. SOLAR THERMAL COLLECTOR  Data for 10 different Thermal Collectors was gathered; 5 Evacuated Tube, 5 Flat Plate. [http://www.solarenergy.ch/index.php?id=111&L=6&no_cache=1]  Evacuated tube collectors seemed to have a higher efficiency on average.  These were evaluated using the equation from AES Solar:  The Enertech Enersol HP65-30 proved to be the best choice.  One panel system provides 2246kWh/year

19. SOLAR THERMAL COLLECTOR-CALCS Q (kWh) AESQ (kWh/day)Q (kWh/h)E (J)Tw,inTw,out January71.904102282.319487170.2577207979277948.6811019.23951 February123.27644784.4027302770.48919225317610921.111027.53796 March189.74693666.1208689220.68009654724483475.691034.38205 April248.05626688.2685422280.91872691433074168.911042.93715 May302.26354119.7504368091.08338186839001747.231048.84017 June281.55997049.3853323471.04281470537541329.391047.3858 July275.63239218.8913674860.98792972135565469.941045.41813 August262.98259638.4833095580.94258995133933238.231043.79266 September210.68675137.022891710.78032130128091566.841037.97519 October145.1397624.6819278070.52021420118727711.231028.65013 November84.403560922.8134520310.31260578111253808.121021.20719 December50.599183091.6322317120.1813590796528926.851016.50188 Total2246.251511

20. HEAT LOAD INCLUDING 12HR LAG

21. BOILER LOAD

23. EXCESS HEAT WASTED

24. SOLAR THERMAL COLLECTORS  Select 2x Enertech Enersol HP 65-30 Solar thermal collectors

25. HEATING DISTRIBUTION  Underfloor Wet Heating system  More efficient than Electric UHS  Lower distribution heat requirement compared to localised wet-flow radiators  Floor heating input = 24-29C, significantly cooler than boiler output  Generally 200mm spacing between pipes

26. HEATING DISTRIBUTION

27. BATTERY STORAGE  It was decided that the family required two days off grid storage.  8 different batteries were compared for storage capacities, including Gel and AGM batteries.  Overall it was determined that the Raylite M-SOLAR 48V 1380Ah battery had the greatest capacity.  The main drawback with these batteries is that the weigh a lot (1524kg), and the require a constant 23-27°C temperature for optimum output.

28. BATTERY USE PER MONTH  The average number of required batteries is 0.7 Raylite M- Solar 48V 1380AhJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember Electrical Load (kWh)7.62 Boiler Load (kWh)33.5321.9615.774.400000.478.8521.8828.31 Total Load (kWh)41.1529.5823.3912.027.62 8.0916.4729.535.93 Days of Storage Required222222222222 Battery capacity (kWh)66.24 Battery capacity at 80% DOD (kWh)52.992 No. Of Batteries Required1.551.110.880.450.28 0.300.621.111.35

29. THANK YOU FOR LISTENING  ANY QUESTIONS?