Hydronic interface system, method and apparatus

A system for cooling a flow of air at a plurality of sites comprising:

• a process liquid chiller subassembly;
• a plurality of air cooling subassemblies;
• a primary loop for process liquid extending between the process fluid subassembly and the plurality of air cooling subassemblies;
• a plurality of secondary loops coupled to the primary loop for feeding process liquid from the primary loop to the air cooling subassemblies;
• means to effect flows of air to be cooled across the secondary loops at the sites to be cooled;
• a plurality of fluid bridges, each bridge coupling the primary loop with a secondary loop, each bridge having feed and return orifices coupled to the feed and return lines of the primary loop and feed and return connections coupling feed and return lines of a secondary loop, and a crossover line coupling the primary and secondary loops;
• a temperature responsive valve in the path of flow of the process fluid to vary the amount of liquid flow through the primary loop and a temperature sensor for each secondary loop to determine the temperature at the secondary loop for controlling the temperature responsive valve;
• and
• a flow responsive valve in the crossover line for each fluid bridge and a flow sensor from each secondary loop responsive to the flow of the process liquid across the crossover line for controlling the flow responsive valve.

A method of controlling the temperature at a plurality of sites to be controlled comprising the steps of:

• providing a process liquid generator subassembly;
• providing a plurality of temperature controlling subassemblies;
• providing a primary loop and a plurality of associated secondary loops extending through the air cooling subassemblies;
• feeding a flow of process liquid in the primary loop and secondary loops extending between the process fluid generator subassembly and the plurality of temperature controlling subassemblies;
• providing a plurality of fluid bridges, each coupling the primary loop with a secondary loop, each bridge having feed and return connections coupled to the feed and return lines of the primary loop and feed and return connections coupling feed and return lines of a secondary loop, and a crossover line coupling the primary and secondary loops;
• sensing the flow in each water bridge crossover line;
• varying a valve in the path of flow through each crossover line in response to the sensed flow;
• sensing the temperature associated with each secondary loop;
• and
• varying a temperature responsive valve in response to the sensed temperature to vary the flow through the primary loop.