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Tuesday, January 26th, 2021
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Energy and Our World

Currently we are getting most of energy using our fossil fuel sources such as coal, gas and oil. On realizing that our popular fossil fuels consumed to generate energy for doing different works are contributing carbon dioxide increase of the atmosphere which results in increase of our atmospheres temperature. Understanding the global environmental issues are pushing us to look for alternate energy sources especially sear for renewable sources as solar, wind, geothermal etc not as alternative but as the only solution to a sustainable world.

From the graph shown we can evaluate the GHG contribution by our popular fossil fuels.
Solar energy ia one of the best source of renewable energy It not only reduces our fossil fuels consumption used to generate various types of energy but also indirectly help in reducing carbon emissions.

The Sun is the most abundant permanent source of energy for its planet Earth. Solar energy is available both directly as solar radiation and indirectly in the form of power from wind, biomass, hydro, and marine sources. The annual solar radiation reaching the earth is over 7500 times the world’s annual primary  energy consumption of 450 exajoules; it varies from place to place, with some parts of the earth receiving a much greater irradiance than the average annual level of 170 W/m2. However, there is a useable solar resource in virtually all parts of the world, and economically attractive applications are not confined to the sunniest regions.

Here is the energy consumption pattern of an average Australian. It shows that households mostly use their energy in two areas

1)    Space heating
2)    Water Heating

Solar systems either Solar Water Heaters or PV Panels helps a lot in reducing incoming electricity bills. They are free- no running bills

Solar Power- Energy Benefits/Applications

Solar energy technologies utilize heat and light from the sun for practical ends. Technologies are being developed that also utilize secondary solar resources such as biomass, wind, hydro, waves, and ocean thermal gradients for our energy requirements.
These applications span through the residential, commercial, industrial, agricultural and  transportation sectors where solar energy is used to make clean water, produce food, heat and light buildings and generate electricity.

•    Generate electricity using photovoltaic solar cells.
•    Generate electricity using concentrated solar power.
•    Heat buildings, directly, through passive solar building design.
•    Heat foodstuffs, through solar ovens.
•    Heat water or air for domestic hot water and space heating needs using solar thermal


•    Solar detoxification of contaminated waters or solar distillation
•    Heat and cool air through use of solar chimneys
•    Solar air conditioning.
•    Use of passive solar in conjunction with building integrated photovoltaics


There are two basic types of device currently used to capture and utilise solar radiation:

􀁦 Solar thermal collectors, which are used to heat air, water or other liquids, depending on the application;

•    Solar water heater directed towards the sun to maximize the gain.
•    Solar hot water systems use solar radiation to heat water. In low geographical latitudes (below 40 degrees) may be provided between 60 and 70% of hot water needed, with temperatures up to 60 ° C, solar water heating systems.
•    The most common types of solar water heaters are evacuated tube collectors (44%) and collectors in the form of flat panel glass (34%) generally used for hot water, and collected nevitrate plastic (21%), used in primarily for heating water in swimming pools.

􀁦 Photovoltaic (PV) collectors, which convert sunlight directly into electricity.
•    Sunlight can be converted into electricity using Potovoltaic (PV), concentrating solar power (PSC), and various experimental technologies. A solar cell or photovoltaic (PV) is a device that converts light into power using the photoelectric effect . PV were used mainly for power supply of small and medium-sized applications, the computer powered by a single solar cell to provide a spectrum independent of photovoltaic-powered homes. For the generation of large scale, PSC as SEGS plants were the norm, but more recently the installation of PV's multi-megawatts is an increasingly common thing.

Environmental Benefits of Solar

•    The Conservation of Fossil Fuels
•    Reduction of Air Pollution
•    Offsetting Greenhouse Gases
•    Conserving Energy
•    Reducing the Need for Dry-cell Battery Disposal


•    Save thousands on your energy bills
•    Free energy sourcing from the sun
•    Get Interest free loan for solar installations (upto 10,000)
•    Install Solar Systems free with Green Loans from the Government
•    Payback with the saving

•    Rebate of upto 1600 for solar water heating systems

Greenhouse gas savings

Solar power is a zero-emission electricity source. One megawatt hour of solar-derived electricity avoids approximately one tonne of CO2.


Photovoltaic (solar cell) Systems

Sunlight is converted into electricity directly by photovoltaic cells (PV) or solar cell; semiconductor devices which contain no liquids, corrosive chemicals or moving parts. Small solar cells are often used to power calculators and watches.
As a solar energy technology, photovoltaics has numerous environmental benefits: it does not pollute, it is silent, solar cells require little maintenance and as a domestic source of electricity it makes energy security totally independent of foreign suppliers.
Photovoltaic systems can either be used as an independent power supply or they can be connected to the grid.

PV Systems  

The basic photovoltaic or solar cell typically produces only a small amount of power (typically producing about 1 or 2 watts). To produce more power, cells are interconnected to form larger units called modules, which in turn are connected into even larger units called arrays. These arrays are further interconnected to yet produce more power, and so. Because of this modularity, these PV systems can be designed to meet any electrical requirement, no matter how large or how small.
PV systems is classified into two general categories: flat-plate systems or concentrator systems.

By themselves, modules or arrays do not represent an entire PV system. We provide structures to put them on that point them toward the sun, and components that take the direct-current electricity produced by modules and "condition" that electricity, usually by converting it to alternate-current electricity. We may also to store some electricity, usually in batteries, for later use. All these items are referred to as the "balance of system" (BOS) components.
Combining modules with the BOS components creates an entire PV system. This system is usually everything we need to meet a particular energy demand, such as powering a water pump, or the appliances and lights in a home, or, if the PV system is large enough, all the electrical requirements of a whole community. Similarly for large electric utility or industrial applications, hundreds of arrays can be interconnected to form a single, large PV system.
Importantly, electricity is generated at the point of demand - where people live and work which means there is no need to transfer the energy long distances across expensive infrastructure.

Solar Electric Off-grid & Grid-tied Houses

To build or retrofit your home for a solar electric system, follow WATEEN Solutions's Step-by-Step Guide

Electricity can be exported to the national grid at over  60 c per kWh

An off-grid home is able to operate completely independently of public electrical utilities.. An off-grid solar electric home can be either, "autonomous" or "hybrid". Autonomous homes rely soley on solar power to generate electricity while hybrids supplement solar power with other sources such as wind, micro-hydro, and fuel-fired generators. In most cases an off-grid home will require a generator for backup.

A grid-tied home combines the comfort and economy of a regular electrical connection with the environmental advantages and independence of a solar electric system. Grid-tied systems are designed to feed directly into your main electric box to reduce your use of electricity from the grid. If your solar system is producing more electricity than you are using, the system will even feed power back to the grid. Hydro One offers net metering which means that with the help of solar power, your electric meter spins backwards, reducing your monthly bill. When designing a system for a grid-tied home the first question is: “How much can I afford to spend?
Grid-Tied and Grid-Interactive systems benefit from Net Metering, where excess energy created by renewable energy sources is sent back to the utility for credit.

Both off-grid and grid-tied systems use PV Panels to convert sunshine to direct current (DC) electricity. Both types of system require inverters to change DC into AC (Alternating Current) electricity which is used in your home. Additional hardware is required for off-grid setups: a charger and batteries to store the electricity you generate for nighttime use and during periods of cloudy weather. Ottawa Solar Power has experience in the design and installation of both off-grid and grid-tie systems.

Solar Hot Water Heaters
Solar Hot Water Heaters are one of the most cost-effective ways to include renewable technologies into your home. Nearly 1/3 of the average electric bill is devoted to heating water in the home. Up to 80-90% of your water heating expense can be saved by installing a solar hot water system. A backup heating element provides hot water during periods of prolonged cloudy weather or heightened demand, assuring a seamless supply of household hot water. Your solar hot water system will provide immediate savings, reduced energy consumption, reduced pollution, and added value.

Solar Water Heating Systems

Solar hot water units are investments of a lifetime, with a solar hot water unit, electricity savings can be as high as 85% and the more you use it the more the savings. The systems are available in different designs and specifications for commercial/institutional or swimming pool heating.
The system consists of a heat collecting panel and an insulated water storage tank. During the day, the sun shines on the solar panel heating the water. This water rises into the tank because of the principle of thermosiphoning which also causes a displacement effect in the tank. The cold water inside the tank flows into the heat collecting panel to get heated and this process gets repeated until all the water gets heated up. This water is stored in the hot water tank for use later. (This water is available hot the following morning)
Did you know;

•    Solar water heating is one of the most practical and proven technologies of utilizing the sun’s energy
•    Has zero running costs, offering better value for money
•    Is unaffected by power cuts
•    Require minimal maintenance
•    It taps a safe, clean Inexhaustible energy source

Solar energy helps protect the environment from pollution and damage that other heating can cause, but did you know that unless your solar hot water system is efficient and durable you could be paying unnecessary electric/wood booster costs.

Solar Thermal  Energy

The Sun is the most abundant permanent source of energy for its planet Earth.. Solar thermal energy, heating water with energy from the sun, is an entirely renewable, reliable and cost-efficient energy source. A typical residential solar water-heating system reduces the need for conventional water heating by two thirds ; making such installations and attractive option for both homes and businesses.

Solar Hot Water 

The shallow water of a lake is usually warmer than the deep water. That's because the sunlight can heat the lake bottom in the shallow areas, which in turn, heats the water. It's nature's way of solar water heating. The sun can be used in basically the same way to heat water used in buildings and swimming pools.

Types of Solar Heating Panels

There are a number of different types of solar panels. Solar panels can also be described as solar collectors. Australia typically utilises three types of solar collector.

    Flat plate Solar Collectors / Panels

•    Evacuated Tube Solar Collector

•    Heat Pumps

The first two types of panels are now described in more detail. Heat pumps details are given separately. 

Flat Plate Solar Collectors / Panels

The most common collector normally used is called a flat-plate collector (non-concentrating). Mounted on the roof, it consists of a thin, flat, rectangular box with a transparent cover that faces the sun. Small tubes run through the box and carry the heat transfer fluid – either water or other fluid, such as an antifreeze solution – to be heated. The tubes are attached to an absorber plate, which is painted black to absorb the heat. As the sun's radiation hits the absorber plate the energy is converted to heat which transfers into the fluid. As heat builds up in the collector, it heats the fluid passing through the tubes which carries it to the hot water tank. The heated water is stored for use in an insulated storage tank just like a conventional hot water system.


To summarize,  using the most current technologies, WATEEN is working in close association with its global technological associates in providing integrated planning and engineering solutions for a new, sustainable energy future. We help our clients in changing their attitudes to reduce energy consumption, develop renewable sources, improve grid reliability and cut emissions from fuels already in use.

Whether you are a residential or business owner and whatever your goals may be, we have the solutions for you.  Our technologies are simple, safe and available to everyone, with outstanding financial benefits through energy savings and programs established by local, state and federal governments.