Renoval resources specially with solar energy

1. SOLAR ENERGY RESOURCES, S.A.
Economic benefit in harmony with the environment
Eng. Wagner Sibaja, MBA
Wagner.Sibaja@SolarEnergy.co.cr

2. The energy problem : Some important facts
• High energy consumption of the most powerful nations
– Consumption of fossil fuels in power generation
• Reduced hydrocarbon deposits worldwide
• Lack of increase in water reservoirs
– The problem of drought in summer (weather)
• Increases in electricity cost
• The equipment for hot water in the markets shows no return
over investment
• Lack of alternative energy:
– Through chemical transformations
– Through the wind (wind energy)
– Using geothermal energy
– Nuclear energy
– Solar Energy

3. Expenditure on fuel for electric generation in Costa Rica
₡80,000
Milions of Colones
₡70,000
₡60,000
₡50,000
₡40,000
₡30,000
₡20,000
₡10,000
₡0
2003 2004 2005 2006 2007
Source: UEN Producción de electricidad
MSc. Fernando Lizana

4. Increases in electricity cost
2008 and 2010 Data ... what can we expect?

5. SOLAR ENERGY
The sun's energy that Earth
receives in a year is equivalent
to 4000 times the energy of the
whole world consumes at the
same time

6. Annual temperature data received from the sun and energy in
Joules per m2 for the Costa Rican territory
Fuente: Wright, 2002
MSc. Fernando Lizana
In Costa Rica, if used as a solar resource averages of 17 MJ/m2 of energy efficiency and a
temperature above 24°C, in 11 hours of radiation can absorb approximately 2.500 Kcal/m2
which it is the energy needed to increase temperature of 50 liters of water to 74 °C.

7. Average temperatures in the area of San Jose as Instituto
Meteorológico in the last 9 years
If it is cloudy, or night, or raining ... does the solar
system work?
The solar panels not only capture the sun's rays
(UV) during clear days, the existing of diffuse
radiation on cloudy days is also exploited (but at a
lower yield than in favorable circumstances).
During periods of adverse weather, the water
storage is responsible for maintaining the constant
temperature water with almost no losses of
temperature.
Estación lluviosa

8. Solar radiation for a panel and vacuum tube
Daily variation of angle of incidence of Vacuum tube for most of the
solar radiation makes a part of it is day absorbs the same amount
reflected, so the efficiency of of radiation, so that the
absorption is not constant efficiency of absorption is
constant.

9. Vacuum tubes: 2 high-tech methods for heating water

10. Installed capacity of solar thermal collectors in the world
Source: International Energy Agency, 2008
MSc. Fernando Lizana

11. Other equipments
SOLAR ENERGY FOR:
 Water Heating
– Household use, swimming pools, hotels, food industry and restaurants
 Lighting:
– Malls
– Streets
– Parks
– Highways
 Generating electricity for the wholesale market:
Large industrial consumers
Residential and condominiums

12. Water heaters
Our equipments
Lightning
Power generation

13. Hydronic heater
Our equipments

14. Generation and lighting: solar innovation

15. Projects installed with solar water heaters

16. Condominium projects

17. Certifications

18. San Jose’s Street Sweeper

19. Business case:
How to improve sweeping in San Jose Town
• Municipalidad de San Jose is management this effort.
• 500 000 cars passes by San Jose down town everyday.
• ¼ of the national trash is produced only in San Jose.
• San José produces 3 000 tons of daily garbage.
• It has 150 workers, each one of them picks up
between 50 and 70 kg of garbage per bag.

20. Searched Information
• A research done by the Municipalidad de San José in
2008 shows that:
– More than the 78 % of the recollected trash is recycle
– 42% is paper
– 11.5% is glass
– 10% metal
– 9% plastic
– 27% garden and food trash.
All landfill should only have 2.1% of the
total garbage.

21. Current Sweeper model
1. This wheel barrel isn’t the appropriate
design to do this kind of job.
2. It requires a lot of effort
3. It is slow.
4. It is not ergonomic
5. It causes the user back and arm damages
during their labor.
6. 2km daily

22. The proposal
• The proposal consists of a new street sweeper:
– Load: 550 Kg.
– Max speed: 20 km/h sweeping
– Electric
– Working width: 1650 mm
– Night shift sweeper

23. Conclusion
• Regarding results:
– This change will cause an effective trash collection for maintaining the city sweep.
– New image will be given to the city.
– Odor will be contained in the truck.
– Garbage not visible.
– Garbage collection is only at night
– Electric load at day
– Friendly with environment
– Cover more distance: 20km vr 2km
– Ergonomic
– Positive ROI