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The following article was published in our article directory on September 6, 2010.
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Ground source heat pump technology in the rapid global development

Article Category: Business Management

Author Name: Amanda xzh

2010 World Geothermal Conference just concluded in Bali, Indonesia, which is sponsored by the International Geothermal Association every five years, geothermal event, this year's theme is "Geothermal: change the world's energy." 2010, 85 countries, the General Assembly, 2,500 participants, to the largest in history. Meanwhile, the world geothermal utilization, particularly the use of ground source heat pump, also reached the largest in history. World Geothermal Conference from the national reports submitted by States, statistics, summarized the development of the world's total geothermal conditions, it is five years, the authority of one of the most accurate statistics.

First, the world's geothermal overview

Geothermal power generation in 27 countries, with a total installed capacity reached 10751MWe, annual energy use 67246GWh, the average utilization factor of 72% (year 72% of the time at work). Growth in the past five years, the largest U.S. 530MWe, Indonesia 400MWe, Iceland 373MWe, New Zealand 193MWe. Geothermal power generation capacity and power output of the world's top ten are: USA, Philippines, Indonesia, Mexico, Italy, Iceland, New Zealand, Japan, El Salvador, Kenya. Indonesia, the rapid development of the past 5 years it ranked fourth in 2005 was promoted to third place, and Mexico for the position. Geothermal direct use in 78 countries, the total device volume reached 50583MWt, in the use of heat 121696GWh, the average utilization factor of 0.27. Thermal energy of the world's top ten are: China, United States, Sweden, Turkey, Japan, Norway, Iceland, France, Germany and the Netherlands. In the 2005 World Geothermal Conference Statistics Sweden to develop ground-source heat pump because, from tenth in 2000, jumped to second place look; it five years, it slowed down the heat, for a position with the U.S., the United States rose to No. 2.

Second, the world's geothermal direct use of data analysis

2009 World Geothermal direct use of the total equipment capacity 50583MWt, than in the 2005 World Geothermal Congress (statistical cut-off to 2004) increased by 78.9%. This five-year average annual growth rate is 12.33%. Direct use of geothermal capacity of the largest share of the total equipment is accounted for 69.7% of ground source heat pump, followed by 13.2% swimming bath, again of conventional geothermal heating 10.7%, the rest of the greenhouse, aquaculture, industry, the proportion of snow so small.

2009 World direct use of geothermal energy is 438071TJ (121696GWh), compared with 2005 data, the World Geothermal Congress (2004), an increase of 60.2%. The average annual growth rate of the last five years 9.89%. Direct use of geothermal energy is the ground source heat pump the largest share of total 49.0%, followed by swimming bath, 24.9%, again a conventional geothermal heating 14.4%, the rest of the greenhouse, aquaculture, industry, the proportion of snow so small.

Global average of the direct use of geothermal utilization coefficient of 0.27, ie 8760 hours per year in operating hours to 2365 hours. This figure compared with 0.31 in 2005 and 2000 were down 0.40, this is because the use of ground source heat pump rapid growth, the use of ground source heat pump coefficient of 2009 world average of 0.19%.

Third, the rapid growth of ground source heat pump

Ground Source Heat Pump growth in the world far beyond the high-temperature geothermal direct use and the speed of development of geothermal power, which is due to ground source heat pump energy-saving, emission reduction advantages are accepted and popular, attracting investors and customers of the eye.

World Geothermal Conference 2010, statistical data on the use of ground source heat pump energy reached 214782TJ (1012 joules), and the 2005 World Geothermal Congress statistics compared to five years, an increase of 2.45 times the average rate of 19.7 %. 2010 World Geothermal Congress Statistics ground source heat pump equipment capacity 35236MWt (MW thermal), in five years, an increase of 2.29 times the average annual growth rate of 18.0%. In short, this is a better community and customer recognition of the ground source heat pump capacity and produce results.

Application of ground source heat pump in the world concentrated in North America, Europe and China. Assembly of the World Geothermal Ground Source Heat Pump use of state in 2000 26 countries, 33 countries in 2005, the 43 countries in 2010.

The typical household by the United States and Western Europe, the average capacity of 12kW unit basis, the world's total installed capacity of 2010, 2.94 million sets in 2005 to 2 times 4 times in 2000. Actual use of home units, some as small as 5.5kW, while commercial and public buildings of the unit can be as large as 150kW or more, China's production of large single unit has more than 4000kW.

Ground source heat pump, the average energy efficiency coefficient (COP) by 3.5 to consider, it consumes a power (eg 1kW), while use of 2.5 times (ie 2.5kW) of shallow geothermal energy, the total output 3.5kWt heat, so the rated Capacity (design efficiency) is the (COP-1) / COP = 0.71, ie the output power of 71% of the use of shallow geothermal energy. Ground source heat pump geothermal cooling applications do not use as a consideration, because it is the heat into the underground rock and soil or groundwater, but refrigeration applications replacing fossil fuels, reducing greenhouse gas emissions.

Ground source heat pump applications in the world top 5 countries are the United States, China, Sweden, Norway and Germany.

Fourth, energy saving effect

Geothermal is a localized, sustainable and renewable energy, it replaces other forms of energy, particularly fossil fuel energy. Many countries use geothermal reduce dependence on imported fuels, but also for all countries to reduce pollution, that is, particulate matter and greenhouse gases.

Barrel of oil heat is 6.06 × 109J, if the energy used for power generation, efficiency factor is 0.35, that is, 2.121 × 109J converted into electrical energy; if this energy for heating, the efficiency factor is 0.70, that is, 4.242 × 109J into the effective use of thermal energy.

2009 World ground source heat pump using heat 214782 × 1012J, if considered by electricity use, equivalent to annual savings of 1.012 million barrels, or 15.19 million tons of oil, which is equivalent to one-half of global oil consumption, that is the world's annual petroleum consumption of 0.42%; if considered by heating boiler, which is equivalent to a year savings of 0.506 million barrels or 7.6 million tons of oil.

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