Tuesday, July 8, 2014

Literature Review

ISS Lit review

  1. What is the best design in collecting the most water?

  1. How does condensation work?
    Condensation, the formation of a liquid from a vapor or gas. Condensation takes place when the gas or vapor is cooled or compressed (or both), and heat is given off in the process. It is what physicists call a change of state, involving an increase in density of the substance without any chemical change.

  1. Will it work in Singapore?
    Singapore is a hot and humid country. Since air usually contains water vapour, the amount depending primarily on the temperature of the air,As air temperature increases, its capacity to hold moisture also increases. Thus there is a higher rate of \ condensation in Singapore.

  1. How can we speed up the process of condensation?
    Cooling the surface of the material.
  2. Will it be easy to assemble?
    Yes, All it requires is tying of bamboo strips.
  3. How do we ensure the stability of the structure?
    Having a bigger base that is spread out, like a buttress root

Thursday, July 3, 2014

Making a Water Harvester

Best solution and reason

The design we have chose is a Vase like structure made out of Bamboo/Rattan as they are strong yet light. They will be connected in lattice framework, which is crisscrossing, and tied together with strong cable strings. The inside will be lined with plastic nylon mesh that have it’s own waterproof feature, eg: waxy, that allows the condensed water to slide down to the bottom to be collected. We could also install a fan at the top opening to blow the water down and several LEDS to indicate the position of the tower.

Air Well

An air well is a structure or device that collects water by promoting the condensation of moisture from air. Designs for air wells are many and varied, but the simplest designs are completely passive, require no external energy source and have few, if any, moving parts. All air well designs incorporate a substrate with a temperature sufficiently low so that dew forms. Dew is a form of precipitation that occurs naturally when atmospheric water vapour condenses onto a substrate. It is distinct from fog, in that fog is made of droplets of water that condense around particles in the air. Condensation releases latent heat which must be dissipated in order for water collection to continue.

Water-Collecting Wind Turbine

A new type of wind turbine harvests not only electricity from the wind, but clean water from the air, by condensing humidity from even the driest climes. a harvester powered by a 30-kilowatt solar panel and a water condenser that can connect to an existing power grid. The turbine works like a typical wind turbine, with three upwind blades spinning to generate electricity. Then in a separate process, air is sucked into the turbine's nose and sent through a cooling compressor, which extracts moisture from the air. Water droplets drip down stainless steel pipes inside the turbine shaft and are collected at the base, which houses a filtration and purification system. The system is powered by the wind turbine.

Tuesday, July 1, 2014

What is Science?

·Science as a body of knowledge that is acquired through systematic observations of the natural world around us
·Scientific mode of inquiry as used by scientists
·Scientific method as a body of techniques for investigating phenomena, acquiring new knowledge or correcting and integrating previous knowledge
·Examples of scientific discoveries
·Components of the Scientific Method – Designing, Implementing, Reporting and Evaluating

What is the scientific method?

The scientific method is the best way yet discovered for winnowing the truth from lies and delusion. The simple version looks something like this:

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  • 1. Observe some aspect of the universe.
  • 2. Invent a tentative description, called a hypothesis, that is consistent with what you have observed.
  • 3. Use the hypothesis to make predictions.
  • 4. Test those predictions by experiments or further observations and modify the hypothesis in the light of your results.
  • 5. Repeat steps 3 and 4 until there are no discrepancies between theory and experiment and/or observation.
  •  Source