What do heat exchangers do in a data center?
Passes heat between two loops while keeping the fluids separate. A heat exchanger passes heat across a metal wall while keeping two fluid circuits separate. Brazed-plate, gasketed plate-and-frame, shell-and-tube, and air-coil designs suit different pressures, fluids, cleaning needs, and footprints. In data centers it can isolate facility water from server coolant, connect an immersion tank to a water loop, reject heat outdoors, or hand recovered heat to another customer. Its interfaces are thermal and hydraulic: inlet temperatures and flow set duty, while pressure drop sets pump work. Materials and gaskets must tolerate both fluids, pressures, chemistry, and cleaning method. A leak through the wall can mix loops; external leaks release fluid; fouling, air, blocked channels, or gasket failure reduce transfer. Operators need isolation, drains and vents, inspection, strainers or filtration, cleaning access, and a way to detect cross-contamination. Procurement should specify duty at normal, partial, peak, and fault conditions; allowable approach temperature and pressure drop; design pressure and temperature; materials; fouling allowance; code approvals; and test requirements. Ask whether plates can be added or cleaned in place, what space disassembly needs, and whether bypass or standby capacity keeps service online. Compare products at the same temperatures and fluid properties, not only nominal kilowatts, because a tighter approach often requires more surface and pumping.