amvic building system Éco le secondaire de windsor ...€¦ · model. the trace700® energy and...

Amvic® Building System

le Secondaire de Windsor Building Construction Comparative Energy Study

Éco

Presented to: Rick Stacey Amvic® Building System

File: 112120245 400 – 1620 Dickson Ave Kelowna, BC V1Y 9Y2 Contact: Emmanuel Lavoie, EIT LEED

September, 2007

AmvicP®P Building System

Table of Contents

1.0 INTRODUCTION ................................................................................................................1.1

2.0 STUDY DESCRIPTION & ASSUMPTIONS .......................................................................2.1 2.1 #1 – PROPOSED SCHOOL ENVELOPE CONSTRUCTION .............................................2.2 2.2 #2 - ICF AMVIC® WALL CONSTRUCTION WITH PROPOSED SCHOOL ROOF

CONSTRUCTION...............................................................................................................2.3 2.3 #3 - ICF AMVIC® WALL CONSTRUCTION WITH AMDECK® ROOF.................................2.3 2.4 VARIOUS ASSUMPTIONS AND INFORMATION..............................................................2.4

3.0 ENERGY COMPARISON...................................................................................................3.4

4.0 CONCLUSION....................................................................................................................4.7 APPENDIX A………………………………………………………………………………….4.9 APPENDIX B………………………………………………………………………..……….4.12

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AMVIC® BUILDING SYSTEM Introduction September 3, 2007

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1.0 Introduction

Stantec Consulting Ltd. (Kelowna office) was commissioned by Amvic® to provide a comparative study of the anticipated energy savings using insulated concrete form construction (ICF) at the École Secondaire de Windsor in Windsor, Ontario.

Opinions stated in this report are based upon conversations and information provided by Luis Trelles Turgeon, New Construction Project Coordinator for the Conseil Scolaire de District du Centre-Sud-Ouest.

Lead Stantec Consulting personnel participating in this study included:

• Emmanuel Lavoie, EIT, LEED AP

The contact for this report is Mr. Emmanuel Lavoie (250-860-3225).

2.0 Study Description & Assumptions

The École Secondaire de Windsor project is currently at the design phase. It is Stantec’s understanding that this project is targeting the LEED® Gold level of certification.

Due to high insulation values, increased thermal mass and greater resistance to infiltration, the ICF Amvic® wall and roof systems offer an energy efficient type of wall and roof construction. The purpose of this report is to quantify the level of energy savings available by using ICF Amvic® wall and roof systems over the currently proposed block wall, spray applied insulation and exterior brick construction.

Current architectural plans of this facility were used to produce a detailed heat loss/heat gain model. The Trace700® energy and load modeling software was used to obtain peak heating and cooling loads as well as monthly total cooling and heating energy for three different building construction alternatives. Typical school schedules were used in the modeling software to account for alternate summer occupancies and temperature setpoints.

The outputs from the Trace700® software were utilized to produce further engineering calculations using up-to-date local energy rates. Utilizing this data, it was possible to calculate annual energy costs for the three construction alternatives.

AMVIC® BUILDING SYSTEM Appendix B September 3, 2007


The energy costs presented in this report only account for the building envelope heat gains and heat losses. Other energy uses such as outside air heating/cooling, lighting, computers, domestic hot water and other miscellaneous loads were ignored in this study. These figures were not included in this study as they are identical in all three alternatives and are not influenced by the envelope construction. Based on Stantec’s experience in energy audit/modeling, building envelope heating gains/losses typically account for 15%-30% of a school’s total yearly energy consumption.

The three alternatives studied in this report are presented below:

2.1 #1 – PROPOSED SCHOOL ENVELOPE CONSTRUCTION

This alternative is based on the current proposed wall and roof assemblies. This information was obtained from the architectural drawings. The wall and roof assemblies were modeled in NRCan’s EE4 modeling software to obtain the total R-values. The EE4 outputs can be found in Appendix A.

1. Proposed exterior wall assembly – (R-15.9):

a. 8” concrete block

b. Air-vapour barrier

c. 2.5” spray applied insulation

d. 1” air space

e. 3.5” face brick

Note: It is important to note that the proposed exterior wall assembly already achieves a good level of energy efficiency due to a high insulation value, lack of thermal bridging, resistance to infiltration and high thermal mass.

2. Proposed roof assembly – (R-24):

a. 2.5” wood deck

b. Vapour barrier

c. 4” rigid insulation

d. 1” fibreboard

e. Tapered insulation



f. Thermoplastic roof membrane

3. Windows:

a. U-value: 0.3

b. Shading Coefficient: 0.5

4. Infiltration assumed to be 0.06 cfm/sq.ft. of exterior wall

2.2 #2 - ICF AMVIC® WALL CONSTRUCTION WITH PROPOSED SCHOOL ROOF CONSTRUCTION

This alternative assumes insulated concrete form construction to the underside of the roof assembly. The roof would consist of the current proposed roof assembly.

1. High thermal mass ICF Amvic® wall – (R-23)

2. Proposed roof assembly – (R-24):

a. 2.5” wood deck

b. Vapour barrier

c. 4” rigid insulation

d. 1” fibreboard

e. Tapered insulation

f. Thermoplastic roof membrane

3. Windows:

a. U-value: 0.3



2.3 #3 - ICF AMVIC® WALL CONSTRUCTION WITH AMDECK® ROOF

This alternative assumes insulated concrete form Amvic® wall construction with Amdeck® roof construction.

1. High thermal mass ICF Amvic® wall – (R-23)



2. High thermal mass Amdeck® roof system – (R-32)

3. Windows:

a. U-value: 0.3



2.4 VARIOUS ASSUMPTIONS AND INFORMATION

1. Energy Costs as of August 22, 2007:

a. Electricity: Hydro One Rate Code “Small Business Customer”: $0.062/kWh runout rate

b. Natural Gas: Enderbridge Rate Code 6: $11.15/GJ

2. Proposed mechanical system for school is distributed heat pumps connected to a boiler/tower loop.

a. Performance of Cooling Equipment: 10 EER

b. Performance of Heating Furnace: 85% efficiency

3. Building information (approximate figures):

a. Floor area: 88,400 ft2

b. Roof area: 53,900 ft2

c. Wall area: 37,900 ft2

d. Glass area: 7,200 ft2

3.0 Energy Comparison

The heating/cooling loads and energy consumption information presented in this section represent the energy losses and gains experienced through the building envelope. The three alternatives presented in Section 2.0 offer the following peak heating and cooling loads and annual energy consumptions:


Type of Building Construction

Peak Heat load (Btu/h)

Peak Cooling load (tons)

Heating Annual GJ

Cooling Annual

ton*hours

Annual Heating Cost

($)

Annual Cooling Cost ($)

Total Annual Energy Costs ($)

Proposed School Construction 643,300 80 962 58,917 $10,728.39 $4,383.40 $15,111.79

ICF Amvic Walls with Proposed Roof System 610,900 81 818 56,393 $9,117.48 $4,195.61 $13,313.09

ICF Amvic Walls with AmDeck roof system 571,100 79 721 58,818 $8,037.76 $4,376.09 $12,413.85

The following chart illustrates the total annual heating costs for the three construction alternatives:

Annual Natural Gas Costs for Building Envelope Heating of École Secondaire de Windsor

$10,728.39

$9,117.48$8,037.76

$-

$2,000.00

$4,000.00

$6,000.00

$8,000.00

$10,000.00

$12,000.00

Proposed SchoolConstruction

ICF Amvic Walls withProposed Roof System

ICF Amvic Walls withAmDeck roof system

Type of Construction

Ann

ual N

atur

al G

as C

ost



The following chart illustrates the total annual cooling costs for the three construction alternatives:

Annual Electricity Costs for Building Envelope Cooling of École Secondaire de Windsor

$4,196 $4,376$4,383

$-

$1,000

$2,000

$3,000

$4,000

$5,000

$6,000





Ann

ual E

lect

ricity

Cos

t



The following chart illustrates the total annual energy costs for the three construction alternatives:

Annual Total Costs of Energy to Heat and Cool the Building Envelope of École Secondaire de Windsor

$13,313.09 $12,413.85

$15,111.79

$-$2,000.00$4,000.00$6,000.00$8,000.00

$10,000.00$12,000.00$14,000.00$16,000.00$18,000.00$20,000.00





Ann

ual E

nerg

y C

ost

4.0 Conclusion

The École Secondaire de Windsor, a high school currently in the process of being designed, was modeled in load and energy software to obtain detailed peak heating and cooling loads as well as monthly tabulated energy consumption.

These figures were used to perform a comparative analysis of the yearly energy costs for cooling and heating three building envelope alternatives.

Compared to the proposed building envelope, the insulated concrete form (ICF) Amvic® construction system offers better insulating value and a greater thermal mass for the roof system. It is important to note that the proposed exterior wall assembly already achieves a good level of energy efficiency due to a high insulation value, lack of thermal bridging, resistance to infiltration and high thermal mass.




In the case of the École Secondaire de Windsor, ICF Amvic® walls with proposed roof construction would provide approximately $1,800 in annual energy savings over the proposed wall and roof construction. ICF Amvic® walls and Amdeck® roof would provide approximately $2,700 in annual energy savings over the proposed wall and roof construction.


Appendix A – EE4 wall and roof construction R-value calculation

Walls:



** Average of both wall R-values was used since exact type of spray insulation is unknown. Average of R-13.4 and R-18.4 = R-15.9



Roof:




Appendix B – Trace 700® Outputs

System ChecksumsBy Stantec Consulting Ltd.

Fan CoilDistributed Heat Pump

HEATING COIL PEAKCLG SPACE PEAKCOOLING COIL PEAK TEMPERATURES

Heating DesignMo/Hr:Sum ofMo/Hr:7 / 15Mo/Hr:Peaked at Time: Cooling HeatingSADBOADB: -1OADB:87 / 74 / 108OADB/WB/HR:Outside Air: 55.0 85.7Plenum 72.0 70.0

ReturnPercentCoil PeakSpace PeakSpace PercentPercentNetPlenumSpace 76.1 70.0Ret/OASens. + Lat. Of TotalTot SensSpace SensOf TotalSensibleOf TotalTotalSens. + Lat 69.976.1

0.00.0Fn MtrTDBtu/h (%)Btu/hBtu/h(%)Btu/h(%)Btu/hBtu/h0.00.0Fn BldTDEnvelope Loads0.00.0Fn Frict0Skylite Solar 0.000000000

0Skylite Cond 0.00000000036,152Roof Cond 24.78-159,399-159,399322,169436,1520

0.00328,806Glass Solar 0059405,67934328,806036,149Glass Cond -175,907 27.35-175,907322,653436,1490

AIRFLOWS

HeatingCooling

69,176Wall Cond 19.88-127,912-127,912963,549769,1760

5050Vent

0Partition 0.00000000

2,2750Infil

0Exposed Floor 0.00000000

37,23837,238Supply

27.39139,513Infiltration -176,183-176,1830015139,513

0 0MinStop/Rh

99.40609,796Sub Total ==> -639,401-639,40174514,05164609,7960

37,238Return 39,513Internal Loads

2,32550Exhaust176,462Lights 0.000026176,46237352,924176,4620 0Rm Exh0People 0.00000000

00Auxiliary0Misc 0.000000000

176,462Sub Total ==> 0.000026176,46237352,924176,462

0Ceiling Load 0.0000000000Ventilation Load 0.60-3,87300002,7710

Sup. Fan Heat 02

ENGINEERING CKS

HeatingCooling

Ret. Fan Heat 022

% OA 0.10.1

Duct Heat Pkup 000

0.420.42cfm/ft²0Ov/Undr Sizing

0.00000000

467.86cfm/ton

Exhaust Heat0.000

-1-10,382

1,110.42ft²/ton-7.2810.81Btu/hr·ft²

0No. People

786,257Grand Total ==> 100.00-643,273-639,401100.00690,513100.00955,113166,082

AREAS HEATING COIL SELECTIONCOOLING COIL SELECTIONTotal Capacity Sens Cap. Coil Airflow Enter DB/WB/HR Leave DB/WB/HR Gross Total Glass Coil Airflow Ent LvgCapacityton MBh MBh cfm °F °F gr/lb °F °F gr/lb ft² (%) °F°FcfmMBh

Floor 88,381 Main Htg -643.3 37,238.4 69.9 85.779.6 955.1 850.9 37,238.4 76.1 58.6 47.4 55.0 49.1 43.4Main ClgPart 0 Aux Htg 0.0 0000.0 0.0 0.0 0 0 0 0 0 0 0Aux Clg

ExFlr 0 0.0Preheat 0 000.0 0.0 0.0 0 0.0 0.0 0.0 0.0 0.0 0.0Opt VentRoof 53,890 0 0Wall 37,913 7,169 19 Humidif 0.0 0 0.0 0.079.6 955.1Total

Opt Vent 0.0 0.00.00

-643.3Total

Envelope LoadsSkylite SolarSkylite CondRoof CondGlass SolarGlass CondWall CondPartitionExposed FloorInfiltration

Sub Total ==>

LightsPeopleMisc

Sub Total ==>

Ceiling LoadVentilation Load

Additional Reheat

OA Preheat Diff.

Ov/Undr SizingExhaust Heat

RA Preheat Diff.

Grand Total ==>

Internal Loads

0

00

0.000.000.00

-10,382

Reheat at Design 0 0

Peaks

Dehumid. Ov Sizing 0 0

TRACE® 700 v6.0 calculated at 04:27 PM on 08/22/2007Project Name: 112120108

Dataset Name: Alternative - 1 System Checksums Report Page 1 of 1W:\01121\ACTIVE\112120245_AMVIC_ICF_SCHOOL_ENERGY_STUDY\CALCS\AMVIC_ICF_ENERGY.TRC

elavoie

Text Box

Alternative #1









AIRFLOWS

HeatingCooling

29,208Wall Cond 15.64-95,515-95,515321,740329,2080

5050Vent


2,2750Infil


37,90337,903Supply

28.84139,508Infiltration -176,183-176,1830014139,508

0 0MinStop/Rh

99.37625,963Sub Total ==> -607,004-607,00475526,38264625,9630




176,462Sub Total ==> 0.000025176,46236352,924176,462


Sup. Fan Heat 02

ENGINEERING CKS

HeatingCooling

Ret. Fan Heat 022

% OA 0.10.1

Duct Heat Pkup 000


0.00000000

468.20cfm/ton

Exhaust Heat0.000

-1-10,210

1,091.72ft²/ton-6.9110.99Btu/hr·ft²

0No. People

802,425Grand Total ==> 100.00-610,877-607,004100.00702,844100.00971,472166,254




Opt Vent 0.0 0.00.00

-610.9Total


Sub Total ==>

LightsPeopleMisc

Sub Total ==>


Additional Reheat

OA Preheat Diff.


RA Preheat Diff.

Grand Total ==>

Internal Loads

0

00

0.000.000.00

-10,210


Peaks




elavoie

Text Box

Alternative #2









AIRFLOWS

HeatingCooling

29,208Wall Cond 16.73-95,515-95,515321,740329,2080

5050Vent


2,2750Infil


36,87536,875Supply

30.85139,507Infiltration -176,183-176,1830015139,507

0 0MinStop/Rh

99.32602,900Sub Total ==> -567,174-567,17474507,31464602,9000




176,462Sub Total ==> 0.000026176,46237352,924176,462


Sup. Fan Heat 02

ENGINEERING CKS

HeatingCooling

Ret. Fan Heat 022

% OA 0.10.1

Duct Heat Pkup 000


0.00000000

466.71cfm/ton

Exhaust Heat0.000

-1-10,479

1,118.59ft²/ton-6.4610.73Btu/hr·ft²

0No. People

779,362Grand Total ==> 100.00-571,046-567,174100.00683,776100.00948,135165,985




Opt Vent 0.0 0.00.00

-571.1Total


Sub Total ==>

LightsPeopleMisc

Sub Total ==>


Additional Reheat

OA Preheat Diff.


RA Preheat Diff.

Grand Total ==>

Internal Loads

0

00

0.000.000.00

-10,479


Peaks




elavoie

Text Box

Alternative #3

amvic building system Éco le secondaire de windsor ...€¦ · model. the trace700® energy and...

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