Peter Amerongen Part 2 - Solar Energy Society of Alberta

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First found Nov 13, 2015

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David White (geologist)
David White (geologist)

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Cost Optimization of Conservation Measures
Cost per kilowatt-hour/year
(kWh/a) of any energy
conservation measure
=
Cost of the measure / energy
saving in kilowatt-hours per
year(kWh/a)
For Net Zero Energy at the Lowest Cost
Cost per kWh/year of
energy conservation
=
Cost per kWh/year of
energy collection*
*Current cost of PV in Edmonton is $3.00
to $3.50 for the capacity to generate
1 kWh/year
NRCan R2000 Net Zero Energy Pilot
•
•
13 teams representing all regions of the country!
•
Will also test drive NRCan’s new Energuide Rating System and provide
empirical support for Net Zero and Net Zero Ready labels
Intended to demonstrate and prove the lessons learned following the
CHMC Equilibrium Housing Initiative.!
Expect to see
•
A very nifty spreadsheet tool for calculating new ERS numbers and
verifying net zero energy design compliance. !
•
•
•
Simpler systems!
Air source heat pumps!
Net Zero Energy houses on less favourable sites
Goals / Values / Prejudices
We want
We think
•
Lowest environmental
impact!
•
Energy conservation is inherently
better than energy generation!
•
•
Lowest cost!
•
The cost of high levels of conservation
should be at least partially offset by
simpler mechanical systems!
•
We should try to keep everything as
simple as possible!
•
Heat pumps simultaneously reduce the
size of net zero energy PV arrays and
the cost effectiveness of conservation!
•
Life is complicated
•
•
•
•
Healthiest indoor
environment!
Durability!
Disaster resilience!
Ease of maintenance!
Superb Comfort
Kennepohl Franchuk Residence Solar Access
Sunpath
S
Site Plan January 15
Monthly solar access
Basement
Main
Second
Kennepohl Franchuk
Residence
North
South
•
House area is ~ 2250 sq. ft plus
finished basement!
•
TFA is 2626 sq.ft (245m2)
ERS 82
ERS 86
Passive House
Envelope Specifications
Foundation
R25- 2" EPS +R20 frost
wall
R37- 4"EPS + R22 Frost
wall
R52- 6" EPS + R28 Frost
wall
underlab insulation
R9- 2" Type 2 EPS
R18- 4" Type 2 EPS
R27
Walls
R 24 - 2x8, 24"O.C. R28
Batt
R40- 12" Double 2x4 ,
24" OC
R67- 16" Double 2x4with
2x4 wiring chase,
Cellulose plus R14 roxul
Ceiling
R60- cellulose
R80 - cellulose
R100- cellulose
Windows
Duxton fbreglass wih
R5.33/R8.33 COG
Duxton fbreglass wih
R5.33/R8.33 COG
~R 10 COG Passive House
windows
1.5 ACH -Caulked poly
with Habitat details
.5 ACH - Caulked Poly
with Siga tape and extra
care and attention
.03 ACH- Taped OSB,
even more care and
attention, Passive house
windows
Air tighness
Mechanical Systems
Heating system
Large central air source
heat pump- Zuba Central
Ducted mini split air
source heat pumpMitsubishi SEZ
Electric baseboards
HRV
VanEE 2000HE
Air Pohoda Ultima 240E
Air Pohoda Ultima 240E
Hot Water
Air source DHW
Air source DHW
Air source DHW
Lowest'Cost'Net'Zero'with'EGH'82'Envelope*''
Air'Source'HP'with'Air'
'Source'DHW
C.O.P.
Remaining'Electrical'Load
Installed'PV'waRs'
Panel''Size'V'18'sq'X',''250'WaRs
PV'Area'Available
Space'Heat* Cooling*
9100
1000
2.0
4.1
4550
243
DHW
4550
1.6
2844
L.A.M.E.
5840
1.0
5840
Total
20490
13477
13477
Shading'Adjustment'%
Modules'needed
1
54
13477
900'Sq'feet.
PV'Area'Needed
970
SqX.
Envelope'upgrade'cost**
Zuba'Central'cost**
Air'source'DHW'cost**
Ducted'Mini'Split'cost**
PV'Cost
$0
$8,000
$0
N/A
$43,800
Total'Net'Zero'Upgrade'Cost''
$51,800
* Annual Heating and Cooling from HOT2000
'
** Costs in relation EGH 82 envelope !
with gas furnace and DHW
Lowest'Cost'Net'Zero'with'EGH'86'Envelope'
Air'Source'HP'with'Air''
Source'DHW
C.O.P.
Remaining'Electrical'Load
Installed'PV'waRs'with'no'shading
Panel''Size'V'18'sq'X',''250'WaRs
PV'Area'Available
Space'Heat* Cooling*
4200.0
1400.0
2
4
2100
341
DHW
4200.0
2
2625
L.A.M.E.
5840.0
1
5840
Total
15640
10906
10906
Shading'Adjustment'%
Modules'needed
1
44
10906
900'Sq'feet.
PV'Area'Needed
785
SqX.
Envelope'upgrade'cost**
Zuba'Central'cost**
Air'source'DHW'cost**
Ducted'Mini'Split'cost**
PV'Cost
$18,000
N/A
$0
V$2,000
$35,443
Total'Net'Zero'Upgrade'Cost''
$51,443
* Annual Heating and Cooling from HOT2000
'
** Costs in relation EGH 82 envelope !
with gas furnace and DHW
Lowest'Cost'Net'Zero'with'~'Passive'House'Envelope*''
Baseboard'Heaters'with'Air''
Source'DHW
C.O.P.
Remaining'Electrical'Load
Installed'PV'waRs'with'no'shading
Panel''Size'V'18'sq'X',''250'WaRs
PV'Area'Available
Space'Heat Cooling*
1600
2100
1.0
1.0
2100
1600
DHW
4200
1.6
2625
L.A.M.E.
5840
1.0
5840
Total
13740
12165
12165
Shading'Adjustment'%
Modules'needed
1
49
12165
900'Sq'feet.
PV'Area'Needed
876
SqX.
Envelope'upgrade'cost**
Zuba'Central'cost**
Air'source'DHW'cost**
Savings're'electric'baseboard'**
PV'Cost
$45,000
N/A
N/A
V$8,000
$39,536
Total'Net'Zero'Upgrade'Cost''
$76,536
* Annual Heating and Cooling from HOT2000
'
** Costs in relation EGH 82 envelope !
with gas furnace and DHW
Passive House Benefits
•
•
•
Energy intensity based approach - 15 kWh/m2 per year!
•
Conservative calculations that gives more detailed feed back and therefore control - on significant details!
Likely the highest energy efficiency standard in the world!
Heavy emphasis on comfort, health, and durability. Details and
assemblies are subject to rigorous hygrothermal scrutiny!
•
•
•
Thermal Bridging!
Window performance and installation!
Solar gains
Additional benefits from the passive house approach
•
Much better windows - whole window U values as low as 0.5w/m2K.
Windows frequently account for 50% of total heat loss in ultra low
energy houses. !
•
Better HRV technology!
•
•
•
•
•
Sensible apparent recovery efficiencies as high as 93%!
Beautifully made, durable HRVs and ERVs with bigger core areas!
Ground loop preheating of incoming fresh air!
Better air sealing products!
•
•
Tapes and gaskets!
Smart air vapour barriers!
Heavy emphasis on hygrothermic safety and durability
Passive buildings need to have
low thermal bridging.
•
•
Both Construction Thermal
Bridges and Geometric Thermal
Bridges can be significant.
At some point piling more
insulation onto the surfaces
doesn’t help much, and the joints
and points need to be looked at.
Picture Credit: David White
©Passive House Institute US 2013 – Certified Passive House Consultant Training
7
Stale air exhaust from
kitchen, bathrooms
Mini split indoor unit c/w blower
and laundry
Transition
supply duct
10kW Thermolec
Post Heater
Mini split outdoor unit
Exhaust stale air out
Fresh air to house
Fresh air from
outside
10" round duct to
supply heating and
fresh air to house
Modulating damper
10 " return air from house
- transition to framing cavities to
provide return from each floor
Controller to sync mini split fan
with thermostat and post heater
*Needs EGH 86 or!
better envelope
Air Pohoda
Ultima 240 ERV
Proposed Heating and Ventilating System
Air Pohoda ERV!
Ultima 240E
Sliding gates on both sides of
core alternate air flow through
heat exchanger channels
•
•
90 to 95% efficient recovery!
•
Low electrical consumption (.65 watts/ cfm
at 118 cfm)!
•
Easily homeowner control of humidity
levels!
•
High quality components, durable
construction
Self defrosting without preheat or indoor
air recirculation !
ERS 82
ERS 88
Passive House
Envelope Specifications
Foundation
R25- 2" EPS +R20 frost
wall
R37- 4"EPS + R22 Frost
wall
R52- 6" EPS + R28 Frost
wall
underlab insulation
R9- 2" Type 2 EPS
R18- 4" Type 2 EPS
R27
Walls
R 24 - 2x8, 24"O.C. R28
Batt
R40- 12" Double 2x4 ,
24" OC
R67- 16" Double 2x4with
2x4 wiring chase,
Cellulose plus R14 roxul
Ceiling
R60- cellulose
R80 - cellulose
R100- cellulose
Windows
Duxton fbreglass wih
R5.33/R8.33 COG
Duxton fbreglass wih
R5.33/R8.33 COG
~R 10 COG Passive House
windows
1.5 ACH -Caulked poly
with Habitat details
.5 ACH - Caulked Poly
with Siga tape and extra
care and attention
.03 ACH- Taped OSB,
even more care and
attention, Passive house
windows
Air tighness
Mechanical Systems
Heating system
Large central air source
heat pump- Zuba Central
Ducted mini split air
source heat pumpMitsubishi SEZ
Electric baseboards
HRV
VanEE 2000HE
Air Pohoda Ultima 240E
Air Pohoda Ultima 240E
Hot Water
Air source DHW
Air source DHW
Air source DHW
Value Matrix
~Passive
EGH 82 EGH 88
House
Lowest total energy use
3
2
1
Lowest cost net zero
1
1
3
Lowest environmental impact
3
2
1
Heathliest indoor environment
2
2
1
High durability and hygrothermic safety
3
2
1
Disaster resilience
3
2
1
Ease of maintenance
2
2
1
Best comfort
3
2
1
Simple systems
3
2
1

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