The solar chimney

With the new Zero Energy House finally going in for planning meant that the hundreds of hours researching possible green technologies to incorporate into the design have been reviewed, researched, priced and filed. For one reason or another most technologies researched wont make it to the new house design but this one did. The solar chimney.

The use of a solar chimney may benefit natural ventilation and passive cooling strategies of the building and so helping reduce energy uses, CO2 emissions and pollution in general.
Introducing a solar chimney to our design benefits from the stack effect with natural cool air being pulled through the building, something that before was only thought possible in the West by means of Air-conditioning / Mechanical extracts.

With this design feature now in place does mean that the bulk of electricity we produce through our photovoltaic panels will contribute in reducing drastically the houses zero energy figures.

Anyway, came across this while i was researching solar chimneys. Here’s a Solar tower. Works on the same principals using the stack effect to create a constant flow of air so powerful it can spin turbines night and day.

sheltering for natural disasters

Sheltering For Natural Disasters

I’ve been mulling over the idea of designing a refuge shelter for mountain bike excursions for sometime now, and the thought process behind that has led me to think about designing shelters where the need is greater – a basic survival shelter to be used in the conflict zones or in the aftermath of natural disasters.

Natural (and Man-Made) Disasters

Natural disasters have caused mass destruction in 2010 and continue into 2011 with floods, earthquakes, hurricanes, tornadoes and landslides all having the devastating effect of displacing hundreds of thousands of people. Survivors of such natural disasters need to be immediately relocated and protected from the elements in order that they can be treated for injuries and against diseases.

As well as natural disasters, hundreds of thousands of people around the world are displaced due to warfare and conflict with the consequent need for refugee camps and medical facilities.

It can take weeks, if not months for supplies to reach disaster struck areas. Humanitarian efforts must work quickly with relief organization in providing immediate responses for emergency medical needs and working emergency shelter solutions.

Temporary hospitals, back-up power supplies, clean water, temporary relief roads must all happen immediately to prevent any chances of health epidemic outbreaks including cholera, TB, malaria, dysentery and water contamination.

This time last year, I was in conversations to see if I had the right skills to help prepare, plan and work in a team to co-ordinate an instant relief camp for the Haiti earthquake. The task would have been to help with the immediate planning layout for sheltering thousands of displaced people. And although I had to ultimately pass up the opportunity, that didn’t mean I couldn’t contribute my own thoughts as to how a standard platform for a future emergency shelter would take shape.

Once the location, structuring and planning of a relief camp has been proposed it must have to work quickly under the guidance of set regulations and requirements for the relief camp to take shape. Only once a safe environment and shelter has been provided can medical facilities and relief aid agencies really get to work with helping the victims.

Quickly Getting Relief To The Stricken Areas

One of the most important aspects of planning a shelter design is weight. Air transport is critical when supplying disaster relief organizations to provide immediate emergency medical care and acceptable standards for shelter solutions.

Aid relief will be restricted by payload amounts, making transport of low-volume, low-weight cargo an attractive solution for the future in achieving vast quantities of medical and emergency supplies in one drop to disaster areas.

Designing Tomorrows Emergency Shelter

So for an emergency shelter to be successful it must provide the greatest strength with the least amount of weight; be cost effective and extremely quick and simple to erect on-site.

Earth’s hostile zoning from the Antarctica to the Sahara shows it creates diverse weather conditions, so the form of a design needs to be a universal shape providing adequate protection against whatever extreme conditions that can be thrown at it.

Geodesic structures make the greatest strength-to-weight ratios possible in a self-supporting shelter. The weight of these structures is distributed evenly throughout the series of triangles in the structure. They enclose the most amount of space with the least amount of material. Since they have less area to lose heat from, they’re also very energy efficient.

We can take this structural form and prepare its design to a flat sheet format. Three sheets clicked together would create small, individual sheltering but by simply adding further sheets in modular form, larger spaces for the use in temporary hospitals, storage facilities and relief aid offices could be built as and when required. One sheet fits all. Nothing complicated.

Geodesic History

The first modern geodesic dome was designed by Dr. Walter Bauersfeld in 1922. Richard Buckminster Fuller obtained his first patent for a geodesic dome in 1954.

Geodesic domes are an efficient way to make buildings. They are inexpensive, strong, easy to assemble, and easy to tear down. After domes are built, they can even be picked up and moved somewhere else. Domes make good temporary emergency shelters as well as long-term buildings. Perhaps some day they will be used in outer space, on other planets, or under the ocean.

If geodesic domes were made like automobiles and airplanes are made, on assembly lines in large numbers, almost everyone in the world today could afford to have a home.

If you want to try the flat pack paper dome click on the link below and print it out. You’d be surprised how simple it all is.

http://sci-toys.com/scitoys/scitoys/mathematics/dome/paper_dome/left_dome.gif

Materials For A Flat Pack Shelter.

Flat pack geodesic domes produced in mass numbers would dramatically drop the production price and we are talking hundreds of thousands at a time that would need to be manufactured. It would have the benefits of being able to supply thousands of temporary shelters in one air-drop due to the minimal weight factor and volume and because of the high performing shape it would be capable in withstand earth’s hostile environment wherever it was located.

Future Materials To Consider.

VIP Insulation

VIP is an insulation product that is five to 10 times thinner than conventional insulation materials used in building (e.g. polystyrene, polyurethane, glass or mineral wool) with the same heat transfer co-efficient (U-value). VIPs have been successfully implemented in buildings for several years.

I’ve been watching the progression of VIP insulation in buildings now for about six years. Obviously in the beginning it was a new technology and came with a high price tag but now costs are dropping and production prices are becoming more affordable. The biggest current problem with VIPs is if it gets punctured it loses its thermal properties. In the near future VIPs will be sandwiched in durable material to prevent this damage.

I’m sure with a little experimenting VIPs can be manufactured to take on the flat pack Geodesic shape with pressed seems creating the fold lines to take form of the dome. (See image 1).

Advantage is thermal performance to weight. What with dehydration being a major killer in the heat and Hypothermia a killer in the cold this life-saving material can offer cool spaces where need be and can reverse its usage by offering a warm thermal blanket in extreme cold environments.

Nano Solar Technology

This is another product I’ve been following for a while. Wafer thin solar cells, lightweight, bendable, easily interconnected and easily adjusted in size.

Not only does the company propose that the cell will be produced at 1/10th the cost of conventional silicon solar cells but they are also eight times more efficient than the traditional solar panels we are using today. Its produced by large barrel printers on foil (sheets)… with the way technology is advancing, we’re probably not that far away from being able to roll these panels out to the flat pack shape. Geodesic form could be used for the emergency shelters outer shell.

http://www.nanosolar.com/technology/technology-platform

As site planning prepares the relief camps these modular domes can be locally connected together in series so the domes become uniformly connected in accordance with the relief camp shelter layout and suddenly supplying a long-term power solutions once the world has forgotten about the disaster. We have to remember what might seem like inadequate power amounts to the west would be ample amounts to a relief camp.

Conclusion

Not that this should become a platform for how to green up low power demands for shantytowns but it does have to be seen that getting the effected disaster areas back on track takes longer than the expected and will offer the camp a consistent power source for its life span.

The world has to be honest and respect the fact the humanitarian relief camps are not going to vanish six months after they were erected.

These camps are going to become communities for years to come. You also can’t expect canvas and tarpaulin handouts to be the future for housing thousands of homeless families. The developed nations need to do more than just offer aid money in the beginning and then expect disaster victims to be living under plastic sheeting and cooking by kerosene for the next 10 years when the rest of the world forgets about them.

Although the idea might seem like an expensive solution today but tomorrow it could be the standard emergency survival shelter the world needs.

As Buckminster Fuller said, “If geodesic domes were made like automobiles and airplanes are made, on assembly lines in large numbers, almost everyone in the world today could afford to have a home.”

Words. Nick Chapple. Editor. Carlos Schtang.

January: Innovative Thinking Time

Sudden thought

Whilst in Berlin no trip would have been complete without visiting the German Bundestag with it’s impressive blend of new and old Architecture binding together to form unity. But over shadowing this Grand Building was it’s four gigantic flags to each of its recently renovated corner towers. The energy flowing through these flags were immense.

The history of flags

Flags have been around and in use for at least 3000 years. One of the most popular uses of a flag is to symbolize a nation or country. Apart from the National flags with their potent patriotic symbols  we also have the international flags of the world consisting of The United Nations flag, The Olympic flag and The Green Peace flag. Every nation and identity has a flag. Humans love flags.

The acceptance of flags

On a visual level flags symbolize strength, unity and even promote Individualism. Through this man has grown to loves the power of the flag and it has become excepted from Governmental Buildings to World Summits to basically every festival and temporary event on earth.

So getting to the point!

The Science of Kinetic flags.

(Kinetic energy of an object is the extra energy, which it possesses due to its motion.) We’ve got kinetic energy plates for car parks; we have even got the ideas of “Giant Kinetic” sea snakes for the oceans so how about Kinetic flags. Surely we have the technology at hand to produce cost effective “nano” fabrics that entrap the “snap” out of the flag’s energy. Look into it deep enough and I’m sure nano solar technology can be incorporated into the same fabric so it could still achieve to create electricity on calm still sunny days and doubles up the usage of grid tied converters.

Added information. 21st January: Carbon nanotubes used to make batteries from fabrics. Article i just read. So now the fabric can also be a battery! BBC website.

Anyway just a thought like!

January: This Months Interesting Reads

Solar power from the Sahara is one step closer. Click on the links to read further

desertec – the foundation

concentrating solar power explained

In the news last month “guardian.co.uk” the German-led Desertec initiative believes it can deliver power to Europe as early as 2015. The report says that in 20 years, solar power could provide the same amount of electricity as 72 coal-fired power stations. This is enough to supply 100 million people. The study found that concentrated solar power could account for up to 25% of the world’s energy needs by 2050.

The solar technology involved is known as concentrated solar power (CSP) uses mirrors to concentrate the sun’s rays on a fluid container. The super-heated liquid then drives turbines to generate electricity. So the future could be (CPV) concentration photovoltaic. Already we have Low concentration CPV with a solar concentration of 2-100 suns power through to (HCPV) high concentration photovoltaic achieving the power of 200 and more. In May 2008, IBM demonstrated a prototype CPV using computer chip cooling techniques to achieve an energy density of 2300 suns.