V011225

Page 8

Fluidized Glazing & Cladding

Thermal and radiation losses occur over the whole 24 hours with a maximum in the early hours of the morning and from all surfaces exposed to the ambient and to the sky.

The total available losses even during the period of solar impingement are considerably greater than the total solar energy received plus the internally generated energy.
However these gains and losses are not balanced and are very out of phase both temporally and azimuthally.
Gains and losses are temporally out of phase- do not occur at the same time,  out of step

3.1 The addition and mixing of gains and losses to produce a balanced condition

These out of phase energy gains and losses cannot be added  without the involvement of a common effect of each that has a memory of its previous energy history. The common effect is change in temperature, energy gains produce a positive change and energy losses a negative change and the memory is basically due to the amount of substance in which the temperature is changed, the energy storage. A convenient and "friendly" substance is water which has a high heat capacity.

4  Energy dissipation
  by convection and radiation
A very simple fundamental law of natural Physics  states that:-

At thermal equilibrium the temperature of a body
is such that the power lost  is equal to the power absorbed.

The mass of the body does not influence this temperature,  only the time required to reach it.

                Our Planet Earth
(Incidentally it is due to this natural law that the planet Earth that we live on, although  continually bathed in enormous power from the sun and internally generated heat from its core does not continue to increase in average temperature. It has stayed at an overall long term average sea level temperature of around 15 deg.C for millions of years. Without any other means of cooling !) 

The natural evidence that support the claims for McKee FG systems.


4.1 Area of absorption / area of loss :- 
With all other characteristics being constant the equilibrium temperature is dependent solely upon the ratio of two areas :- the area of absorption of energy and the area of loss of energy ; which is obviously  1 for all solid window (and of course cladding ) structures. This is an important natural law and the significance  of it with respect to Fluidized systems should be noted .

If some means could be found to alter this area ratio, to increase it ;  the total energy or solar heat gain to the building would be reduced and the absorbed solar radiation could be easily dissipated without involving high temperatures.     
See Computer simulation Graphs.

4.2  McKee Area Dilution Principle    (M.A.D.P.)
Simply by hydraulically connecting fluidized structures on the North, East, South and West facades (or opposite pairs), the area available for losses is easily increased whilst the area of absorption remains relatively small, because :-    At any one time there can be a maximum of only two facades absorbing direct solar energy ( at large angles of incidence and all facades absorbing much lower levels of diffuse radiation); while all facades are available for loss of energy, by convection and radiation ( To the Sky).
The result is that the temperatures of the structures and the fluid for thermal equilibrium are very much lower than for passive structures, in fact only a few degrees above ambient, usually well below blood temperature, even on hot sunny days and therefore the windows/cladding appear cool to the occupants.  See computer temperature simulations
    or for 150 % solar radiation

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