EWA-TEC GLOBAL LTD
SOLAR ENERGY TECHNOLOGIES
Solar Energy is one of our core businesses because it is a key element in a sustainable world.
The range of solar solutions we offer demonstrate the best available technologies with proven long lifespan.
SOLAR HOT WATER
The production of hot water with solar collectors is
the most common solar technology worldwide.
We offer projects with advanced flat plate glazed
collectors because of their proven performance
and long life reliability. The right size of solar
collectors is important but all the components of a solar hot water system should be in accordance and all materials must be chosen durable to maximize the solar performance.
We will always advice different options between economical and or ecological design. Economical design shows the shortest pay-back with and a reasonable solar fraction. If the solar hot water system is oversized, it will save more energy and create a larger solar fraction, but the yearly performance per m2 collector will be less than the economical design.
Solar Hot Water Domestic - Read more
Solar Hot Water Large Scale - Read more
SOLAR SPACE HEATING
Solar energy is the perfect way to heat water and
air at a low temperature. Low temperature
applications are very efficient when used in floor
and wall heating. Water and air can both be used
in solar energy systems because they are easy to
transport and store when heated.
Solar Space Heating - Read more
Solar Integrated Solutions - Read more
SOLAR COOLING & AIR CONDITIONING
The demand for air conditioning worldwide in all
types of buildings is considerable. Houses, offices,
hotels, laboratories or public buildings such as
museums are only a few of building types that
require conditioned rooms. Under adequate conditions,
solar and solar-assisted air conditioning systems can be
reasonable alternatives to conventional air conditioning systems.
SOLAR ELECTRICITY
The production of photovoltaic solar cells has grown exponentially in the last decade. Basically the choice has to be made between crystalline and amorphous solar cells. Both types have their advantages and drawbacks. Crystalline modules are very sensitive for shading and heat, which can lead to potential energy losses. Amorpheous panels need much more space than crystalline but produce more energy per installed Wattpeak.
SOLAR HOT AIR
Solar heating and ventilation systems can be used to preheat the air and ventilate the building without energy cost. Solar hot air can also be used in large commercial buildings like public swimming pools or industrial applications.
SOLAR POOLS
Many domestic and school swimming pools are heated with expensive heat pumps or are not heated at all. The cheapest and most cost effective way to heat those pools to 28° C is by using innovative solar absorbers made from a specialized black plastic material. These absorbers transform solar radiation into very effective heat for the low temperatures needed in swimming pools. The life span of the solar absorbers has been proven in Europe for more than 30 years and they are resistant against heat and cold. In New Zealand the solar absorbers can be very productive for more than 8 months a year. Design, installation and maintenance are kept simple and affordable. They can be integrated in an aesthetic way on the roof or as a fence.
SOLAR SPA
Every spa pool owner knows that the electricity bill
is the biggest drawback of spa pools. The solution
to this energy problem is simple. Solar hot water
can be produced with very cheap and cost effective
absorbers to reduce the electricity use for pumping
and heating. EWA-TEC has developed an autonomous system consisting of solar absorbers to heat the pool, a solar DC pump to transfer the solar heat, a solar PV cell to run the DC pump and a solar controller to maximise performance. In this way the energy needs for powering the spa pool can be reduced for 8 months of the year.
SOLAR POND AERATION
Many lakes, ponds or lagoons show odour problems,
algae growth and fish are dying because of lack of
oxygen. Mixing and aerating can help solve all these
problems but require a lot of electricity. Solar
energy is implemented to create energy savings.
SOLAR UTILITY VEHICLES
Golf Carts, Buggies and other electric Utility Vehicles rely on an independant power source from a battery. The quality and reliability of the battery is the primary concern. Limited range and long recharging times are the main disadvantages. This is an ideal application where solar energy can contribute efficiently.
SOLAR SLUDGE DRYING
Untreated sludge takes up a lot of storage space and has high transportation costs. Sludge consists of more then 90% of water. Thermal drying of sludge removes water from sludge to a significantly higher degree then the best dewatering processes. The Solar Sludge Dryer is a unique solarpowered system for dewatering and drying sludge and organic waste. It is powered completely by free solar energy.