Carrier Context:
Unique Projects
The air temperature also must be stabilized, but will be allowed to drift gradually as the seasons change from 25 degrees C in the winter to 20 degrees C in the summer. This will minimize the overall temperature differences across the walls and ceiling, reducing thermal stress and keeping any dirt from being attracted to the frescoes' surface.
The choices of these "setpoints" also will insure that the dewpoint (the temperature at which moisture condenses out of the air) will always be several degrees below the surface temperature of the frescoes to prevent moisture accumulation.
The system supplying the environmental stability craved by the frescoes is a collection of individual elements water chillers, air handlers, pumps, valves, cooling towers that are tied together by an electronic, computer-based control network that allows separate pieces of equipment to communicate with each other and respond to temperature and humidity information being gathered by sensors within the chapel. An organic comparison is often made: The sensors are the system's eyes and ears; the individual elements are its vital organs; the control system its brain and nervous system.
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