Technical Seminar

Experience Sharing for

Implementation of Multi-Function

Heat Pump in Hotel

Joinly organized with AMC, CAD & EVD, HKIE

Dr. Wong Kaixuan

Be engaged in heat energy and cooling study from 1990 to 1994，

University Stuttgart.

Dissertation on heat pump study for the Doctor Cours

Professor, NEU, 1994 to 1997.

Chief engineer, Guangdong 吉荣空调公司，1997-1999.

General manager of Central A/C Dep., Zhuhai Gree (格力空调）, 1999-

2001.

To found Zhuhai Boka Cool Source Equipment Co., Ltd., 2001 – Now.

Mr. Roger Lee

Hong Kong Polytechnic graduate in BSE, 1989

More than 10 years hotel operation experience

More than 20 years working experience

Member of CIBSE

Project Director of ECO Green Energy Saving Company

Hotel Energy AnalysisCooling

Others

Hot Water Lighting

60%

15%15%

10%

Typical Design(most of the Hong Kong hotel design)

Chiller BoilerTo provide air conditioning

To provide hot water year round

Average around 5%-10% increase per year(http://www.mongabay.com/images/commodities/charts/crude_oil.html)

Lastest Design in the past 10 years

Chiller Heat Pump

- To provide air conditioning

- To provide 40 degree hot water

- To provide 7 degree chilled water supply for air conditioningin summer only

Boiler

- To re-heat hot water to 50 – 60 degree for hot water use in Summer

- To provide 50 – 60 degree hot water supply in Winter

Obviously this system cuts the energy cost.

BUT

Complicated system

Heat pump always operated in fully heat recovery mode

On non-peak hours hot water consumption, heat pump will be easily hunting

On/Off heat pump will disturb the central A/C system

Large invesment

More space requested

High maintance cost

Heat pump cannot 365 days operate to provide lower hot water production cost

Weaknesses

Any other choice?

There is a new equipment

Hot water energy cost comparison

(based on hotel in Kowloon, average temperature rise at 35 degree year round)electric tariff 1.0/KWH, diesel $8.2/litre, town gas $0.265/MJ

Multi –function Heat Pump SeminarCIBSE Hong Kong Branch / HKIE Building Services Division /

ASHRAE Hong Kong Chapter / Boka Cool Factory

ZhuHai Holiday Resort Hotel (珠海渡假村)

Water Type (Dual Function) Heat Pump / Chiller(Cool only OR Cool/Heat Simultaneously)

Technical Talk - Multi-Function Heat Pump

Photos of Doctor Wang (Boka Factory)Mr. M.K. Liu (CIBSE Hong Kong Branch)

Mr.Roger Lee (ECO Green Energy Saving)

Multi-Function Heat Pump, R134a(Cool only OR Cool/Heat Simultaneously OR Heating only)

• Cooling mode only (act as an air cooled chiller) to provide 7℃ chilled water supply

• Cooling & Heating mode (act as water to water heat pump)to provide 7℃ chilled water supply and 50℃ hot water supply

• Heating mode only (act as air to water heat pump) to provide 50℃ hot water supply

It integrates an air cooled chiller, water to water heat pump and air to water heat pump into one body to perform :

Job Reference

Job Reference

真善美大酒店4星级 江門逸豪五星級酒店

萬方金莎酒店（河南焦作）

序號 用戶名稱 地區

1 珠海市婦幼保健院

醫院項目

2 珠海市香洲區人民醫院

3 中山三鄉人民醫院

4 廣州醫學院第一附屬醫院

5 廣西富川縣人民醫院

6 珠海北京酒店

廣東珠海

7 珠海南灣國際大酒店

8 珠海南油大酒店

9 珠海益健假日酒店

10 珠海鄉泉酒店

11 珠海金口岸假日酒店

12 珠海金域酒店

13 海灣大酒店

14 珠海益健保健中心

15 珠海太平洋保健中心

16 珠海華駿酒店天富健康中心

序號 用戶名稱 地區

17 香港珀麗酒店 香港

18 澳門皇都酒店 澳門

19 廣州珀麗酒店

廣東廣州20 廣州歐亞酒店

21 廣州鄉土華豐酒店

22 廣州醫學院第一附屬醫院

23 中山古鎮國貿大酒店

廣東中山

24 中山三角真善美大灑店

25 中山東升匯景酒店

26 中山市富華酒店

27 中山小欖皇冠假日酒店

28 中山市星寶休閒中心

29 中山大三角酒店

30 中山世紀廣場

31 中山麗閣商務酒店

32 中山坦洲豪益假日酒店

33 深圳富臨酒店

廣東深圳34 深圳麗灣酒店

35 深圳百合酒店

36 深圳金帝都酒店

How does it work?

Multi-function heat pump system

Multi-function heat pump system(MFH)

Condensing FinHeat Exchanger

HeatRecovery

Condenser

EvaporatorCompressor

Storage Hot Water Tank

Guest Room

Fan Coil

Air source multi-function heat pump Hot water system

Mode of Operation

Mode A：Cooling and hot water supply in Summer

(Partially heat (sensible heat) recovery)

(for non-peak hot water demand period)

Mode B：Cooling and hot water supply in Summer

(Fully heat (sensible & latent heat) recovery)

(for peak hot water demand period)

Mode C：Hot water supply only in Intermittent Weather

Mode D：Heating and hot water supply in Winter

Partly heat recovery(sensible waste heat recovery)

Feature：

In Summer, MFH operate to provide 7 degree chilled water & 50-60 degree hot water to meet the non-peak hour (00:00-19:00) hot water demand.

Condensing Fin release waste latent heat to ambient

Sensible heat recovered to provide

hot water supply

To provide chilled water supply

Fully heat recovery(sensible & latent heat recovery)

Feature：

In Summer, MFH operate to provide 7 degree chilled water & 50-60 degree hot water to meet the peak hour (19:00-00:00) hot water demand.

Condensing Fin stop working, no

heat will emit ambient

Sensible & latent heat recovered to provide

hot water supply

To provide chilled water supply

Hot water supply only(for Intermittent Weather)

Features:To produce 50-60 degree hot water supply. Reduced hot water energy cost up to 60%against electric/town gas/diesel boiler

Condensing Fin absorbed heat from ambient.

ambient heat (3/4) and compressor

heat (1/4)are recovered to provide hot water

supply

No Cooling and Heating

Heating and Hot water supply(In Winter)

Condensing Fin absorbed heat from ambient

ambient heat (3/4) and compressorheat (1/4)are recovered to provide hot water supply

Part of heating energy to provide

space heatingt

Features:To produce 50-60 degree hot water supply for portable use & 45-50 degree hot water supply for space heating. Reduced hot water energy cost up to 60% against electric/town gas/diesel boiler

Say a Hongkong hotel,cooling period is 10 month, daily hot water demand is 100 m3.

Annual hot water demand：

Case Study

Case Study

Case Study

Case Study

Besides, it reduce Carbon Emission up to 1000 Ton annually

(compare to electric boiler, 100m3 daily hot water demand)

Chiller+Heat Pump+BoilerMulti-function Heat Pump VS

Can operate 365 days year round

Overall COP higher

Save more than 50% annual energy cost than traditional

Can provide stable chilled water & hot water supply

Without disturbance to the central A/C system

Reduce operating hours of the main chiller plant

Provide higher hot water temperature (up to 60 degree)

No need boiler to back up especially in Winter

Less maintenance cost

Conclusion

- Environmental Friendly

- Reliable & Convenience

- Energy saving

- Save Investment & Space

- Less Maintenance

During selection of Equipment, it shall be taken into consideration

Enquiries

Mr. Roger LeeECO Green Energy Saving CompanyProject DirectorContact Telephone 3691-8549 / 60776087Contact Email roger.ecogreen@yahoo.com.hk

Doctor WangBoka Cool Source Equipment Co.LtdGeneral ManagerContact Telephone 86-15018914061Contact Email eming_lee@qq.com

Thanks