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Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Illuminating my Family's Environmental Footprint
By Arjen LentzOpen Source Developers' Conference
October 2015, Hobart TAS
2Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Our Objectives
● Provide feedback on resource use to family– Live data
– Hot water & Electricity
– Gain insight → learn
– Influences & modifies behaviour over time!
● Cheap and non-intrusive● Local, not central control
– Lack of hot water is not cool
3Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Displayon any phone, tablet or computer
4Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Home Network Cabinet
5Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Hot Water Monitoring/Control
Hot waterflow meter
6Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
GigEthernet in Garage – Because.Power-over-Ethernet
7Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Arduino solar hot water controlFreetronics Arduino gear
ArduinoEtherTen
802.3afPoE board
RTCmodule
Relay drivermodule
8Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Booster Relay Ruleset
if (((h >= 14 && h < 20) && temp < 42) ||
((h >= 4 || h < 7) && temp < 40))
{turn on booster relay}
if (temp > 46)
{turn off booster relay}
9Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
UDP → CSV (SHW_FLOW tag)
SHW_FLOW,"2014-03-08","12:07:28",6.32,105
SHW_FLOW,"2014-03-08","12:07:29",6.32,105
SHW_FLOW,"2014-03-08","12:07:30",6.14,102
SHW_FLOW,"2014-03-08","12:07:31",6.14,102
SHW_FLOW,"2014-03-08","12:07:32",5.96,99
SHW_FLOW,"2014-03-08","12:07:33",5.96,99
SHW_FLOW,"2014-03-08","12:07:34",5.79,96
SHW_FLOW,"2014-03-08","12:07:35",5.96,99
L/min(Calc)
# flow impulses(since last line)
10Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
UDP → CSV (SHW_TEMP tag)
SHW_TEMP,"2014-03-07","15:19:53",64.12,49.50
SHW_TEMP,"2014-03-07","15:19:54",64.12,49.56
SHW_TEMP,"2014-03-07","15:19:57",64.18,49.56
SHW_TEMP,"2014-03-07","15:20:03",64.18,49.62
SHW_TEMP,"2014-03-07","15:20:04",64.18,49.56
SHW_TEMP,"2014-03-07","15:20:05",64.18,49.62
SHW_TEMP,"2014-03-07","15:20:11",64.25,49.62
SHW_TEMP,"2014-03-07","15:20:17",64.25,49.68
SHW_TEMP,"2014-03-07","15:20:22",64.31,49.68
SHW_TEMP,"2014-03-07","15:20:27",64.31,49.75
SHW_TEMP,"2014-03-07","15:20:38",64.37,49.75
SHW_TEMP,"2014-03-07","15:20:42",64.37,49.81
Collector sensor temp
Vat sensor temp
11Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Raspberry Pi + RFM12B transceiver
12Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
StandardFusebox
13Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
OpenEnergyMonitor.org
14Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Import/ExportAre we Winning, Overall?
ImportedTotal kWh
ExportedTotal kWh
It's spring. We run ahead over summer.
15Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Our PV Data @ pvoutput.org
16Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
pvoutput.org neat live graphs!
17Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Lessons & Future
● Behaviour influenced.– Horays!
● Split hot water system would have been better– Rather than rooftop
– We think night time exposure leads to more loss● Approx 1 degree per hour in 320L storage vat
– Better yet: heatpump hot water system● Use excess PV during day● More space for extra PV panels
● We're not quite yet ready to go off-grid.
18Illuminating my Family's Environmental Footprint @ OSDC Hobart © 2015 Arjen Lentz CC-BY-SA
Thank You - Questions?
Arjen Lentz
