An introduction to the active and the passive solar energy

Each of the eight main climate zones in Australia has its own climatic characteristics that determine the most appropriate design objectives and design responses. Passive cooling Passive cooling is the least expensive way to cool your home. Very nice PV array sizing tool and solar radiation tool for Europe and Africa.

There is a acre all-Passivhaus development in Heidelberg, Germany. The building, once brought up to temperature after the completion of contruction, is, with the addition of very small amounts of heat, self-regulating and self-sustaining. Thermal mass Thermal mass is the ability of a material to absorb and store heat energy.

This article explains, with illustrations, how to install insulation in a variety of construction types, and includes health and safety cautions, typical solutions and useful tips. Tracker tilt angles are often limited to reduce the wind profile and decrease the elevated end height.

For efficient use of space, airlocks can be double purpose rooms: Seal existing windows and external doors, and replace warped or poorly fitted doors.

The use of floating trackers increases the number of potential sites for commercial solar projects since they can be placed on top of capped landfills or in areas where excavated foundations are not feasible.

Heliostat Moving collector Non-tracking fixed mount[ edit ] Residential and small-capacity commercial or industrial rooftop solar panels and solar water heater panels are usually fixed, often flush-mounted on an appropriately facing pitched roof. Shading of glass to reduce unwanted heat gain is critical, as unprotected glass is often the greatest source of heat gain in a house.

Because of the configuration of the device it is especially suited for use on flat roofs and at lower latitudes. In winter, there are five hours or less of solar heat gain but 19 or more hours of night-time heat loss.

Existing brick homes often have adequate thermal mass. Insulation, thermal mass and shading reduce heat gain, and ventilation provides temperature moderation to reduce interior heat build-up. However, they can be a major source of unwanted heat gain in summer and heat loss in winter.

A number of different and interrelated strategies contribute to good passive design, each the subject of an article in this section.

Design and Installation Manual A very good and detailed reference on designing and installing PV systems -- the best that I know of. The room was packed to overflowing.

What is the actual output from a "1 KW" PV rig? This includes energy used for space heating and cooling, domestic hot water, auxillary loads such as pumps, lighting and plug loads everything plugged into electrical outlets —in other words, all of the energy used in the building.

Roof spaces should be able to be ventilated in summer — often best achieved with thermostat controlled, self-sealing exhaust fans in gables or ridges that can be switched off in winter. Airlocks Airlocks at all frequently used external openings include wood storage areas if wood heating is used are essential in cool and cold climates, preventing heat loss and draughts.

Passive cooling design techniques can be applied to new homes as well as renovations, across a range of different climate zones. Put simply, design for passive solar heating keeps out summer sun and lets in winter sun while ensuring that the building envelope keeps that heat inside in winter and allows any built up heat to escape in summer.

Insulation installation If insulation is to perform as intended then it must be correctly installed. Design additions to allow passive solar access and facilitate movement of passive heat gains to other parts of the house.

Passive design utilises natural sources of heating and cooling, such as the sun and cooling breezes. They use less expensive materials, are easier to build, and are likely to be more efficient.

Summary[ edit ] Trackers for concentrating collectors must employ high accuracy tracking so as to keep the collector at the focus point. The blower door test must be conducted by a third party, according to a standard protocol.

The Gemini House is a unique example of a vertical axis tracker. Since the panels are horizontal, they can be compactly placed on the axle tube without danger of self-shading and are also readily accessible for cleaning. Windows and glazing In terms of energy efficiency, glazing is a critical element of the building envelope, transferring both radiant and conducted heat.

Solar tracker

Further, single-axis tracking systems are prone to become unstable already at relatively modest wind speeds galloping. This is a full winters worth of side by side testing of several DIY solar air heating collector tests. Lightweight materials such as timber have low thermal mass.Solar Energy - Solar Energy There is a bright future for solar power (no pun intended).

On the average sunny day the sun shines approximately 1, watts of energy per square meter, enough energy to power all of our electricity needs and excess(“How”). Sun as Source of Energy.

Nuclear fusion in the active core of the sun produce and inner temperature of 10 7 K and an inner radiation flux of uneven spectral distribution. This inner radiation is absorbed in the outer passive layers which are heated to about K. The sun is a major source of inexhaustible free energy (i.e., solar energy) for the planet Earth.

Currently, new technologies are being employed to generate electricity from harvested solar energy. Hello. I read your article on ((Passive and Active Features in Green Building Architecture | Sustainable Development)).

Solar tracker

most impressed on your vision.in this.I had seen Sustainable Architecture is not a rocket Technology. Passive solar heating uses free heating direct from the sun to dramatically reduce the estimated 40% of energy consumed in the average Australian home for space heating and cooling (DEWHA ).

Photovoltaic (PV) solar electricity systems have captured a lot of interest as the system components have grown more mature, capable, and reliable.

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An introduction to the active and the passive solar energy
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