Kenya sasa nambari saba duniani kwenye Geothermal energy production

Tony254

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Kenya imeipiku Italy na kuchukua nafasi ya saba duniani kwa kuzalisha Geothermal energy. Kenya sasa inazalisha 823 MW huku Italy ikizalisha 800 MW.

Hakuna nchi nyingine ya Afrika inayozalisha umeme kutoka kwa geothermal.

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Kenya has raced past Italy to emerge the seventh-largest geothermal power producer in the world, new global data shows.

Kenya’s geothermal capacity stands at 823 megawatts (MW), having grown by 165MW since last year and moving the East African country above Italy’s 800MW.

This is according to Renewable Capacity Statistics 2020 prepared by Abu Dhabi-based International Renewable Energy Agency (Irena).

Italy is the birthplace of geothermal technology.

In 2010, Italy’s steam power capacity stood at 728MW compared to the current 800MW, meaning the European nation has only managed a 9.8 per cent growth over the past decade.

On the other hand, Kenya’s stock of geothermal has expanded four times over a similar period from 198MW in 2010.

Kenya’s deepening of geothermal development has put it on track to joining the elite Gigawatt Club of countries with geothermal production of 1,000MW (1GW) and above.

Only four nations, including the US, belong to this club. Geothermal is an attractive low-cost renewable energy source with low emissions and serves as stable, reliable base-load electricity.

Last year, Kenya added the third largest geothermal capacity in the world, enabling it to move to top seven global geothermal powerhouses.

“Geothermal power capacity grew by 682MW in 2019 (globally), slightly more than in 2018. Again, Turkey led with an expansion of 232MW, followed by Indonesia (+185MW) and Kenya (+160MW),” Irena said in its update.

Pulled coup

Until last year, Kenya was ranked ninth in geothermal production, but steamed ahead to leapfrog Iceland to position eight and has now pulled a similar coup on Italy.

Geothermal now accounts for 30 per cent of Kenya’s total installed power capacity of 2,700MW with the other share occupied by hydropower, wind, solar and thermal power.

The US is the world’s top geothermal producer with an installed capacity of 2,555 MW – three times Kenya’s output – though the country’s stock has been declining recently.

It is followed by Indonesia (2,131MW) in second place, the Philippines (1,928MW), while Turkey’s 1,515MW comes in fourth.

New Zealand is fifth with 965MW, while Mexico is sixth with 936MW of steam power. Kenya, having dislodged Italy and Iceland comes in seventh.

Geothermal energy was first discovered and developed in Italy over 100 years ago at the beginning of the last century (20th century).

It held the top spot until the second half of the 20th century when other countries took an interest in the power source.

More projects

Kenya constructed its first geothermal plant in 1981, the Olkaria 1.

The East African nation has since built a fleet of other geothermal plants in the Rift Valley steam fields.

Besides Kenya, Ethiopia is the only other African nation that has developed geothermal energy (7MW).

Presently, 85 per cent of Kenya’s geothermal capacity is owned and operated by government-owned power producer KenGen.

KenGen’s installed geothermal capacity currently stands at 607MW, with the firm having more projects in the pipeline.

The company recently added Olkaria V geothermal plant with a capacity of 165.4MW to the national grid and is behind Kenya’s improved fortunes in the Irena rankings.

American firm Ormat is currently the only independent power producer (IPP) with geothermal plants in Kenya and holds the remaining 15 per cent of Kenya’s geothermal power capacity.

More exploration works are being undertaken by other IPPs such as Akiira Geothermal and African Geothermal International Ltd (AGIL), while Mauritius-based Quantum and Kenyan firm Sosian Energy are in the development stage.

The country has an untapped potential of 10,000MW of steam energy in its Rift Valley basin where a series of exploration works are ongoing.

Globally, the total developed geothermal capacity stands at 13,931MW, with Kenya’s 823MW representing a global share of six per cent.

Africa Sustainability Matters is a platform for all matters of sustainability, innovation and leadership in Africa.

Geothermal: Kenya basks in ranking seventh heaven
 
And we still have 10,000 MW of untapped geothermal power in the rift valley. We will overtake other countries soon with new IPPs coming up.
Hongereni Kenya. Hivi ndivyo inatubidi tufanye Waafrika na Ulimwengu wa Tatu kwa ujumla. Tusisubiri mpaka Mzungu atuonyeshe. Nchi nyingine za Afrika tuige mfano huu wa Kenya kutumia jua linalowaka sehemu kubwa ya mwaka; upepo mkali unaovuma; maji ya mito; n.k. Papo hapo tukumbuke tunapopiga hatua mbele, nchi zilizoendelea zitapinga kwa kutoa maelezo fulani, ili mradi tubakie nyuma tukiwategemea wao. Kwa mfano Tanzania tunaambiwa tunaharibu mazingira kwa mradi wa Stiegler's Gorge, na bahati mbaya kunakuwepo na Watanzania wenzetu wanaorubuniwa kuunga mkono hoja hizo. Wachina wamewapiku Wazungu kwa kugundua G5, wanaambiwa utaalamu huo unaleta corona. Wakati Marekani ina silaha nyingi tu za Nuclear, Iran na North Korea wakijitutumua kutengeneza silaha za kujilinda wenyewe, Big Brother Marekani anakuja juu na kuushawishi Ulimwengu kuthibiti hatua hizo kwa kigezo cha uamuzi wa Umoja wa Mataifa ambako yeye ndiye msemaji mkuu. Tuungane nchi za Afrika si kwa maneno maneno tu ya kisiasa.
 
Umenena mkuu
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Wise words
 
Nchi nyingine zina njia bora zaidi za kupata energy quality.

What is the efficiency of geothermal plants compared to other energy quality sources (emergy). By quality I mean transformity.
-Geothermal power plants is 21%.

-Thermal power plants ie Coal, Gas, Diesel etc 20%-48%, with coal having the highest at 30%-48% depending on the type of power plant eg Kenya's planned ultra super critical coal power plant (Amu power in lamu) will have the efficiency of 48%. Producing about 1000 MW upgradable to 4000 MW as energy demand increases.

-Wind, the most efficient fuel for electricity, creates 1164% of its original energy inputs when converted into electricity. Kenya has the largest wind farm in africa.

Advantages:
a) Geothermal energy is renewable; it is not a fossil fuel that will be eventually used up. The Earth is continuously radiating heat out from its core, and will continue to do so for billions of years .it will run out when the Earth does. In about 5 billion years.

b) The space it takes to build a geothermal facility is much more compact than other power plants. To produce a GWh (a gigawatt hour, or one million kilowatts of energy for one hour, an enormous amount of energy), a geothermal plant uses the equivalent of about 1,046 square kilometers (404 square miles) of land. Hydropower, wind, solar power plants use more land.

c) It is clean energy ie. No emissions only water vapour

d) It is a more reliable base load than Hydropower, wind and solar it does not depend on wind speed, the sun or rains to replenish rivers.

Disadvantage:

a) The initial cost is expensive compared to hydropower, wind, solar and thermal.Most developing countries do not have the resources or sophisticated infrastructure to build these power plants.

b) High technical expertise is lacking in most developing countries, especially geological expertise to be able to identify potential wells and to analyse rocks. That is why Kenya had to send geologists to Japan in the 1980's to learn.

c) Very strict geological conditions must be present to harness geothermal power.power the way kenya does. You must have the correct type of rocks that are permeable and high heat wells. That is a combination very unique to Kenya in east africa.
 
For most African countries geothermal can not be harnessed because of:-

a) Geological expertise is lacking, that is why ethiopia turned to kenya for help in developing their geothermal capacity.
b) They can not afford the requisite infrastructure costs
c) They do not have the required geological conditions to harness geothermal power cheaply.
 
Q: What makes geothermal energy costs cheaper per unit than a thermal power plant?

A: The energy is generated right near the plant, it saves on processing and transportation costs compared to other types of fuel. Geothermal plants are also considered to be more reliable than coal or nuclear plants because they can run consistently, 24 hours a day, 365 days a year.
Natural gas power plants have a lower initial cost but have higher overall maintenance and running costs

Q: Which country has the largest geothermal energy potential with today's technology?

A: United states with about 80,000 MW of potential geothermal power, which has not been exploited fully due to the federal government subsidies to the fossil fuel industry but states like california are changing and going more towards geothermal. Kenya has the potential for 10,000 MW against a projected peak demand of 18,000 MW by 2030.
 
-Wind, the most efficient fuel for electricity, creates 1164% of its original energy inputs when converted into electricity. Kenya has the largest wind farm in africa.
Stop copying and pasting things you don't understand, and clearly you don't know much about physics.

How did you get 1164% efficiency? You mean to tell us that no energy is lost? Do you know something about drag coefficient, how about heat dissipation? How did you make use of that energy loss to get 1164%?
 
Now who does not understand physics! Dude you are a fool clearly i can see that

: The power available from the wind is a function of the cube of the wind speed. Therefore if the wind blows at twice the speed, its energy content will increase ten-fold (Hence the 1164%). Please go back to your aerodynamics books. Turbines at a site where the wind speed averages 8 m/s produce around 75-100% more electricity than those where the average wind speed is 6 m/s.

And by the way lift is the most important force in wind farms, the blades are designed to maximize lift and the difference in lift and drag turns the blade, think of them like the blades of a helicopter only vertically aligned. As for heat in wind farms it is miniscule.

Power (W) = 0.6 x Cp x N x A x V3 , Revolutions (rpm) = V x TSR x 60 / (6.28 x R), Cp = Rotor efficiency, N = Efficiency of driven machinery, A = Swept rotor area (m2 ), V = Wind speed (m/s) TSR = Tip Speed Ratio , R = Radius of rotor , Rotor efficiency can go as high as Cp = 0.48..
 
at the same time Kenya imports the potential chop of electricity to ease the worsen tariffs oppressing the poor Kenyans

Normally Kenya is selling a double price for a unit of electricity compared to Tanzanias without "cheap geothermal"

 
Now if you understand physics as you claim to, it will be obvious from the equation that:-

1) The power output of a wind generator is proportional to the area swept by the rotor - i.e. double the swept area and the power output will also double.

2) The power output of a wind generator is proportional to the cube of the wind speed.
 
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