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Heating Buildings with Hot Water

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-251

2025-11-22

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The hot water system has become a very common method of heating buildings. It works by means of the convection currents that are set up in a system of water pipes when a section near the bottom is heated more than the rest. A miniature heating system can be set up and put in operation by the use of the apparatus shown in Fig. 1. By coloring part of the water, the paths of the convection currents can be readily traced. The heating of a house is only an extension of this experiment.

In the hot water system shown in Fig. 2, the hot water leaves the heater by the upper pipes, goes through the different radiators, and then back to the heater, which it enters at

the bottom. In this system the pipes must be kept filled with water. The height of water is read from a gauge attached to the tank, which is higher than any of the radiators.