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Green Shipping: A Moving Target
We all know that planes, trains, and automobiles use gobs of fuel and spew mega-gobs of greenhouse gases and other pollutants into the atmosphere -- and that makes freight transport a particularly dirty business.
The environmental impacts of shipping goods hither and yon are significant but relatively obscure, the true costs hidden amid complex shipping tariffs and product price tags. Businesses that rely on products being moved from one place to another have been able to do little to change the performance of truck, rail, and marine cargo companies. Moreover, cargo companies haven't been on most environmental activists' radar screens.
But that's changing -- and that's the source of my "Toiling Point" column this month on Grist. Check it out.
May 23, 2006 in Business Practices | Permalink
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The worst effect is Ventilation loss in the conventional air conditioning and building system today. It has not been addressed at all. The world has turned a blind eye for 200years until a solution is found. Besides, the life is at stake without knowing the quality of indoor air- It is known as Sick Building Syndrome
WHY IS IT SO? Read explaination
Water and heat recovery ventilator
Two critical issues of heat recovery ventilation are energy efficiency and Indoor Air Quality (IAQ).
In a warm space a stabile phase of water efficiently prevents heat transfers. It fixes impurities of air and it is ideal for growth ground of microbes.
The phase of water is formed for example when there is a board of metal of glass between warm and cool air. Moisture of air condensates on the surface of the board. Due to temperature difference between cool and warm dew point is formed.
These problems are typical for conventional type of heat recovery ventilators. Their annual thermal efficiency is low 30 percent.
Moisture is not permanently on the surface of airAC EnthalpyRecoveryVentilator (EnthalpyRV). Contrary condensation film cyclically condensates and evaporates. Therefore airAC unit takes advantage of latent heat. This is also reason why impurities of air do not fix on the cell. The cell is not a space for microbes. Due to these unique features airAC´s annual thermal efficiency is the best of 76 percent, and IAQ is the best according to the official comparison of VTT. Water does not generate inside of the unit. Because it does not need drain, the installation position is free. When the cells are self-cleaning, and the unit does not need filter to operate, maintenance cost is low, which enables reasonable life-circle cost. airAC is ideal for ESCO.
Due to air never is completely dry, trials using dry air only are useless. Cross flow units use this kind of testing to be able to show high thermal efficiency. But this never takes place in practice. Moisture is poison for them. Contrary airAC takes advantage of it. On the other hand airAC does not use huge amount of energy to rotate heavy metal wheel like so called rotary wheel does. Instead airAC rotates generous ultra light valve which is multipatented. The valve prevents pressure changes and water generation in a cell optimising enthalpy recovery and latent heat.
We have the solution to provide the turnaround of this issue
Posted by: CJamesTay | Jun 3, 2006 4:15:02 AM
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