a low carbon hotel project in vietnam: improving...

JCM PROJECT REPORT

A LOW CARBON HOTEL PROJECT IN VIETNAM:

IMPROVING THE ENERGY EFFICIENCY OF

COMMERCIAL BUILDINGS BY UTILIZATION OF HIGH

EFFICIENCY EQUIPMENT

Dr. Dinh Thi Nga

Research institute for sustainable development

Hochiminh City University of Natural Resources and Environment

Ministry Natural Resources and Environment

Hochiminh City University of Natural Resources and Environment

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PROJECT ORGANIZATION DIAGRAMH

C M

U N

R E

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PROJECT INFORMATION

• A new Energy management system for Vietnam (V-

BEMS).

• Boilers

• Heat pump

• LED light replacement

• Renaissance riverside hotel Saigon

• Nikko Hotel Hanoi

• 2015 - 2017

Which technologies were applied in this project

for energy saving

Where technologies were applied???

Project duration:

Renaissance Riverside Hotel Saigon BEMS Network

VPN

PC Remote Access

From Japan

3F Engineering Room

switching hub(Cisco)

21.5inch LCD

V-BEMS PC (DELL)OS Windows 8.1

Wirelessrouter

(Linksys)

Tablet PC(NEC)

Wireless Router(Linkssy)

3F Chiller Room Roof Floor

R3-SeriesRemote Unit B

MRV Box (M-RF)

Waterproof Temp (waterproof temp Sensor)

Cooling Tower Fan Current (CT (Current Transformer) 4-20mA)

Outdoor temperature & humidity ( temperature sensor 4-20mA)

R3-SeriesRemote Unit A

3F A/C Control Room

MRV Box (M-3F)

Water Flow(Ultrasonic Flow Meter )

Temperature (Temperature sensor )

Pump Current (CT (Current Transformer) 4-20mA)

Chiller Electrical power (CT (Current Transformer) 4-20mA)

Installation System for Renaissance Riverside Hotel Saigon (V-BEMS)

Installation system for Renaissance Riverside Hotel Saigon

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➢The high-efficiency boiler was

developed, and the small once-

through boiler and unit control

system are typical in Japan.

➢High-efficiency boilers are very

effective for cost reduction as the oil

price is high in Vietnam.0%

5%

10%

15%

20%

25%

10 20 30 40 50 60 70 80 90 100

Bo

ile

rs u

se

d [

%]

Load factor [%]

About 80% of customers use

their boilers at load factor of

50% or less.

Why new boilers are

installed?

Installation system for hotel nikko hanoi

◆Advantage of Introducing Heat Pump

Hot Water

3. Fuel change from oil to electricity is effective for reduction of utility costs in Vietnam as the unit price of oil is high.

Outside Air Processor

Water

4. Efficiency of heat pumps improves with higher outside temperature*effective in south-eastern Asia

Cool Air

Warm Air

2. Reduce electricity rate of the chiller resulting from a large amount of cold water saved by delivering cool air from the heat pump to the outside air processor

1. - Generate hot water as well as cool air- Efficiently utilize these two kinds of heat at hotels

Supply cooled outside air

(to guest room)

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Renaissance riverside hotel

saigon

• Address: 8-15 Ton Duc Thang Street, District 1,

Ho Chi Minh City

• New equipment installation:

- A new Energy management system (V-BEMS).

- 2 new boilers

Installation system for Renaissance Riverside Hotel Saigon

◆Layout

Steam

Boiler room plan

Boiler Room

High Pressure Header

New BoilerAmount of Actual Evaporation 1t × ２units Existing Boiler

Amount of Conversion Evaporation 2.4ｔAmount of Actual Evaporation 2t

Remove one of two existing boilers and install two new boilers with around 50% of capacity

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Nikko Hotel Hanoi

• Address: Tran Nhan Tong street,

Hai Ba Trung district, Hanoi,

Vietnam

• New equipment installation:

- A new Energy management

system (V-BEMS).

- Heat pump

- 2 new boilers

- Replace 197 LED lights

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Summery of Introduced TechnologyThe Project targets air-conditioning, lighting, and hot-water supplying,

which altogether consume as much as 85% of the total building energy.

Air-conditionig

60%Lighting

andOutlet 15%

Hot water supply

10%

Kitchen5%

Elevator5%

Others5%

Chiller plant system

Lighting system

Hot-water supply system

DB

Manual operating

management

Operating management using BEMS

water heating by oil

-fired boilers alone

water heating by the

-best mix control system

≪ Typical energy use at Hotels in Vietnam ≫

Heat pump

High efficiency

boiler

renewable

energy

High-efficiency

LED lighting fixtures

Low efficiency

Halogen lighting fixtures

(24 hours lit in the lobby)

廊下客室

廊下

冷水

機械室

給湯

客室hallway

hallway

hot-water supply

guest room

guest room

mechanical room

chilled water


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200

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1000

1200

1400

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使用水量（L

/時）

１日給湯使用量トレンドグラフ

ヒートポンプ給湯器使用

ボイラー使用

◆Best Combination of Hot Water Systems

Heat pump can achieve highly efficient operation by handling the base-load part throughout the day, which will lead to total cost reduction.

Typical example of 24-hours data

of hot-water demand in a hotel.

Hot

wat

er s

upply

flo

w r

ate

Use

boiler

Use

Heat pump

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◆Layout

Vapor

3rd Floor Plan

Boiler Room

High Pressure HeaderLow Pressure Header

New BoilerAmount of Actual Evaporation 1t × ２units Existing Boiler

Amount of Conversion Evaporation 2.4ｔAmount of Actual Evaporation 2t

Remove one of two existing boilers and install two new boilers with 50% of capacity

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◆Lay out

Entrance

Restaurant

Shop

WC

WC

Reception

Business center

Cafe Lounge

DN1DN2

DN3DN5DN6

For staircase

Rectangle 1 Rectangle 2

Rectangle 3 Rectangle 4

1st Floor Plan

X6

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DN1DN2

DN3

DN4

Meeting room

Well hole

RestaurantMeeting room

Lobby

2nd Floor Plan 14

Result achievements

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CO2 credit achievement

• Total: 256

+ Japan (70%): 181

+ Vietnam government (10%): 27

+ MONRE (20%): 53

• Good collaboration in Japan and Vietnamese sites

• Tax exemption procedures

• Data collection

• Report and other procedure for credit distribution

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Experiential lessons

Thank you very much for your

attention!

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