City University of Hong Kong Department Name

 

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Typical weather year

 

Building simulation software can be used to predict the energy consumptions in buildings and to perform dynamic thermal analysis of HVAC systems. An accurate estimation requires the precise representation of the periodic change in local weather conditions. Typical weather year files like Test Reference Year (TRY) and Typical Meteorological Year (TMY) are commonly used for such purposes. Very often the weather year file developed for one place is employed in the numerical simulation of the other places having geographical similarities. Taking the fact that there are long-term changes in average weather conditions in the South China region, the practices of developing typical weather year files were reviewed and discussed based on two neighboring cities: Hong Kong and Macau. Through the statistical analysis of the 25-year weather data (1979-2003) of Hong Kong, the TMY file for Hong Kong was produced. The file has been converted into the EnergyPlus/ESP-r weather format for the use of the building simulation community. This is publicly available at the US Department of Energy, EnergyPlus Energy Simulation Software website:

http://www.eere.energy.gov/buildings/energyplus/cfm/weather_data.cfm.

 Comparison of 5 selected ˇ°Typical Meteorological Monthˇ± candidates for Hong Kong and Macau

Calendar Month

Typical Meteorological Months

Macau

Hong Kong (5 candidates)

1

2

3

4

5

January

1991

1995

1980

1997

1999

1994

February

1995

1988

1997

2000

1990

1998

March

1982

2003

1998

1993

1996

1982

April

1993

1986

1980

2001

1979

1993

May

1997

1997

1993

1986

1995

2000

June

1990

1990

1986

1991

1989

1984

July

1991

2000

1990

1986

1980

1996

August

1982

2002

1996

1993

1991

1989

September

1982

1982

1996

2003

1990

1995

October

1986

1984

1980

1989

1987

1981

November

1990

1989

1984

2002

2003

1995

December

1986

1993

2001

2000

1989

1985

Note:

(1) TMM for Macau was derived from the period 1982-1999 by IWEC.

(2) TMM for Hong Kong was derived from the period 1979-2003.

 

Comparison of Hong Kong TMY and TRY solar data with long term average

 

 Comparison of composite weighted index values (WS) of TRY with TMM Rank No. 1 and No. 5 for Hong Kong

 

Related publications:

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Journal articles:

Chan ALS, Chow TT, Fong SKF, Lin JZ. Generation of a Typical Meteorological Year for Hong Kong. Energy Conversion and Management, 83(1), 2006, 87-96.

Chow TT, Chan ALS, Fong KF, Lin Z. Some perceptions on typical weather year ¨C from the observations of Hong Kong and Macau. Solar Energy, 80(4), 2006, 459-467.

Chan ALS. Developing a modified typical meteorological year weather file for Hong Kong taking into account the urban heat island effect. Building and Environment 46 (12), 2011, 2434-2441.

Chan ALS. Developing furture hourly weather files for studying the impact of climate change on building energy performance in Hong Kong. Energy and Buildings 43(10), 2011, 2860-2868.

Conference paper:

Chow TT, Chan ALS. A case study of developing typical weather year file. Proceedings of the 35th International Congress on Heating, Refrigeration and Air-conditioning, Belgrade, Serbia, Dec 2004. (CD ROM)

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