Energy management (building project)

Marina Park Energy Study BC Housing

Marina Park is located at 4843 48 Ave, Delta, BC and includes fifty (50) one-bedroom apartments of

social housing and a common amenity room. Marina Park is a three-story wooden framed building built

in 1988, approx. 35,500 ft2.

The windows are original to the building. One (1) natural gas boiler original to the building and installed

in 1988 supplies heating hot water to perimeter hydronic baseboards in the suites and common areas.

Domestic hot water (DHW) is produced by one (1) natural gas hot water boiler also original to the

building and stored in a hot water storage tank. Both boilers, DHW storage tank and all pumps are located

in the central mechanical room.

Ventilation is provided by two (2) supply fans located on the roof and in the 3rd floor ceiling space. Both

supply fans are original to the building and provide unconditioned outdoor air to the corridors via ducting

and supply grilles.

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Existing Facility / Building Description

Table 2 – Building Information

Building Information Description

Fortis Account Number 734459 Premise Number 505495

BC Hydro Account Number 1955 8200 082 Natural Gas Utility Rate $8.43/GJ

Electricity Utility Rate $0.114/kWh Construction Type Wood framed

Age 30 years (Built in 1988) Major Renovations None

General Physical Condition Average Floor Area Conditioned 3,300 m2 (35,500 ft2)

Floor Area Non-conditioned 0 Total Floor Area 3,300 m2 (35,500 ft2)

Number of Floors 3 Occupancy Schedule 24/7

Number of Residential Units 50 one-bedroom apartments and amenity room of social housing General System Description In suite heating via hydronic baseboards, DHW and space heating

provided through NG fired central heating plant. See page 17 for detailed description of the building systems.

Energy Use Analysis

Utility consumption and cost from August 2017 to July 2018 was 174,700 kWh at $19,900 for Electricity

with a rate of $0.114/kWh, and 1,820 GJ at $15,300 with a rate of $8.43/GJ for Natural Gas.

Table 3 presents actual natural gas usage for last year.

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Table 3 – Monthly Natural Gas Consumption for 2017

Natural Gas End-Use Breakdown

Natural Gas is utilized by the central heating boiler that supplies hot water to the perimeter baseboards.

The central DHW boiler also utilizes Natural Gas for DHW production.

Table 4 presents actual natural gas usage for the past 3 years

Table 4 - Natural Gas End-Use Breakdown

Electricity Total Consumption

0

50

100

150

200

250

2017 Monthly Consumption (GJ)

5 �

Available Electricity utility data is for 3 years.

Table 5 presents actual electricity usage for last year.

Table 5 – Monthly Electricity Consumption for 2017

-

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

2017 Monthly Electricity Usage (kWh)

The existing space heating boiler has an input

capacity of 1,080 MBH. We have calculated the total

heating requirement to be closer to 400 MBH for

full heating at peak loads. The existing DHW boiler

has an input capacity of 399 MBH with a 115-gal

storage tank.

Existing space heating boiler

Existing DHW boiler

The HVAC ductwork is in overall poor condition. Some exhaust ductwork are not sealed, which is a code violation.

The majority of outdoor lighting at Marina Park currently utilizes conventional incandescent fixtures with

some CFL replacements. Outdoor lighting consists of pole lighting and wall packs on the building exterior,

all controlled by photocells.

Existing outdoor pole lighting

Existing building exterior wall packs

The building envelope is deemed to be in average condition. Some envelope deficiencies were observed including high rates of outdoor air infiltration through poorly sealed windows.

Interior lighting of the common areas at Marina Park is

exclusively by fluorescent bulbs in the common corridors. Some

fixtures have already been replaced with LEDs and the

remaining fluorescent tubes are currently being replaced with

LEDs.

Existing indoor hallway lighting

17 �

System Description

Heating, DHW and Ventilation Systems

Ventilation to the hallways is provided by two (2) supply fans located on the roof and in the ceiling space

above the 3rd floor. Both fans are original to the building and are ducted to two (2) supply air grilles on

each floor. As there is no heating of ventilation air, both fans supply unconditioned outdoor air so it is

presumed that these fans are turned off during the winter.

Heating hot water for space heating is supplied by one (1) natural gas boiler and domestic hot water is

produced by one (1) natural gas hot water boiler. Both boilers are located in the Mechanical room and are

original to the building. Space heating is delivered by perimeter hydronic baseboards in the suites and

common areas.

The central boiler plant consists of one (1) AAE Super Hot 1080 MBH boiler for space heating, one (1)

Lars Mighty Therm 399 MBH hot water boiler for DHW production and one (1) Rheem 115-gal indirect

heated storage tank for DHW. Delivery temperature for the DHW hot water is determined by the storage

tanks. Both boilers are nearing their end of life expectancy.

Mechanical room including existing DHW boiler, DHW storage tank and space heating boiler

18 �

Control equipment

For the major equipment in the mechanical room, controls are

local to the equipment.

Space heating baseboards respond to local manual dial wall

mounted controls in the suites and common areas while some

baseboards are controlled by a manual dial on the unit itself.

Plumbing Fixtures

None of the existing plumbing fixtures on site were observed to

be low flow.

Electrical Systems

Other than lighting, the main components of the common electrical systems are the heating water and

DHW circulation pumps, the ventilation fans, and the elevator.

Each suite has a refrigerator and stove, neither of which are ENERGY STAR rated. There is also a kitchen

exhaust hood in each suite but no bathroom exhaust.

Lighting Systems

Interior lighting of the common areas is a combination of CFL PL lighting in wall mounted fixtures in the

hallways, some ceiling dome LED fixtures, and fluorescent T8 fixtures in the amenity room, laundry

room, office and stairwells. However, it was observed that all fluorescent T8 lamps are currently being

replaced with ballast ready LED lamps.

Lighting in the suites predominantly consists of incandescent lighting with some LED and fluorescent

lighting in the living rooms and kitchens.

Existing indoor entrance lobby LED lighting

Existing in-suite manual dial control for hydronic baseboards

19 �

Outdoor lighting is a combination of incandescent and CFL bulbs for

the pole lighting, incandescent wall packs on the building exterior, and

one (1) HID fixture on the building exterior. Exterior lighting is

controlled by photocells.

Envelope System

The building is wooden framed with a sloped roof and windows are standard double pane with aluminum

frames.

Existing building exterior lighting

Existing indoor amenity room lighting

ECM 01: Boiler Replacement

"Very common in all buildings of this vintage, boilers are oversized for what is actually needed to

meet heating requirements."

Total ECM 01 cost: $36,800

ECM 02: Lighting

a) Outdoor Lighting

The majority of outdoor lighting at Marina Park currently utilizes conventional incandescent

fixtures with some CFL replacements. Outdoor lighting consists of pole lighting and wall packs

on the building exterior, all controlled by photocells.

Total ECM 02a cost: $4,980

b) Indoor Lighting of Common Areas

Interior lighting of the common areas at Marina Park is exclusively by fluorescent bulbs in the

common corridors.

Total ECM 02b cost: $1,030

Consumption Consumption

kWh GJ ekWh ekWh

January 16,676 135.88 37,639 54,316

February 14,731 213.53 59,148 73,878

March 15,622 217.06 60,125 75,747

April 14,388 173.53 48,068 62,456

May 13,813 124.12 34,381 48,193

June 12,532 80.00 22,160 34,692

July 12,366 64.12 17,761 30,127

August 12,135 74.71 20,694 32,829

September 12,599 107.65 29,818 42,417

October 13,851 167.06 46,275 60,126

November 14,674 223.53 61,918 76,591

December 16,630 282.94 78,375 95,005

Overall: 170,016 1,864.12 516,361 686,377

January 15,390 242.11 67,063 82,453

February 13,891 197.89 54,817 68,708

March 14,006 188.42 52,193 66,199

April 13,056 138.95 38,488 51,544

May 13,021 106.84 29,595 42,616

June 12,266 90.53 25,076 37,342

July 12,356 76.84 21,285 33,641

August 12,406 71.05 19,682 32,088

September 12,659 101.58 28,137 40,797

October 13,627 143.16 39,655 53,282

November 14,080 187.37 51,901 65,981

December 15,596 266.32 73,769 89,366

Overall: 162,356 1,811.05 501,662 664,017

January 14,200 208.80 57,838 72,038

February 14,800 204.70 56,702 71,502

March 13,200 189.80 52,575 65,775

April 13,100 176.20 48,807 61,907

May 13,700 137.00 37,949 51,649

June 13,600 101.90 28,226 41,826

July 14,000 85.30 23,628 37,628

August 15,700 87.80 24,321 40,021

September 13,800 95.60 26,481 40,281

October 13,900 139.60 38,669 52,569

November 15,600 196.80 54,514 70,114

December 16,500 218.60 60,552 77,052

Overall: 172,100 1,842.10 510,262 682,362

January 15,840 227.50 63,018 78,857

February 13,991 206.50 57,201 71,192

March 14,615 215.50 59,694 74,309

April 13,495 164.00 45,428 58,923

May 13,419 120.00 33,240 46,659

June 12,408 87.00 24,099 36,507

July 12,587 70.00 19,390 31,977

August 12,453 49.00 13,573 26,026

September 12,559 53.50 14,820 27,378

October 13,660 158.50 43,905 57,565

November 13,700 217.00 60,109 73,809

December 16,400 220.00 60,940 77,340

Overall: 165,127 1,788.50 495,415 660,541

Energy Total

Consumption

2018

Year Month

Electrical

2015

2016

2017

Fuel Total