User Manual

Control concept
Programming in D-MAP
5
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5 Control concept
Supply chain model
In building automation and control, media, such as warm water, cold water,
warm air, and cold air are generated using energy, such as oil, gas, and
electricity, and distributed to consumers.
Each medium can be assigned a supply chain. The supply chain starts at the
generation or handling of the medium. The distribution system then transports
the medium to one or several consumers. A supply chain for building services
systems comprises the following links:
Consumers
The consumer supplies the energy contained in the hot water medium to the
room as per the requested demand (e.g., via a radiator).
Distribution
The distribution system transports the medium from the producer to the
consumer and adjusts it to the individual requirements (minimum losses).
Production
The production consists of a boiler where hot water is treated by means of
energy (e.g., heating oil, gas) and provided to the process.
Supply chains of various media
The following illustration shows a schematic view of the supply chains for the
media air, hot water, and cold water with their respective production
(treatment), distribution (e.g., heating circuit, pre-control), and the consumers.
The supply chain for the medium electricity, which normally begins at supply or
at production, if electricity is produced on-site (e.g., cogeneration plant,
photovoltaic) is also shown.