Air Currents And the Laws of Ventilation Lectures On the Physics of the Ventila
Air Currents And the Laws of Ventilation Lectures On the Physics of the Ventila
Napier Shaw
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The combined effect of channels in parallel arc is the same as that of a single channel whose equivalent thin plate orifice is equal in area to the sum of the areas of the equivalent thin plate orifices for the separate channels. Indirect verification of the laws. From these four laws, of which the last two are the necessary consequence of the two former, just as Kirchhoff's laws of complex electric circuits are the necessary consequence of Ohm's law and the law of electric quantity, the numeri...cal relations of complex pneumatic circuits can be deduced. I propose now to give by way of verification of the laws some examples of the comparison of inferences from them with actual experiment in the case of ventilation circuits of various kinds. 16 AIR CURRENTS Measurement of the effective or equivalent area of a chimney. The first example is derived from some experiments upon the flow of air in a chimney flue of the Cavendish Laboratory, due to the aeromotive force arising from heated air in the flue.
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