| 1.1 |  What Is Pressure Drop?

Pressure drop is the loss of fluid pressure as coolant flows through a heat exchanger. Every restriction, turn, and surface interaction reduces pressure, requiring pumps to work harder to maintain flow. In most cooling system specifications, thermal capacity gets the headline. But pressure drop determines how much energy the pumps consume -- and that cost runs 24 hours a day, 365 days a year.

| 2.1 |  The Compounding Cost

Pumping power scales with the cube of flow velocity. Doubling the flow rate through a heat exchanger increases pumping power by roughly 8x. In a large data center running thousands of cooling loops, even modest pressure drop reductions across each heat exchanger compound into significant energy savings over the system lifetime. A heat exchanger that reduces pressure drop by 30% does not just save 30% on pumping energy -- it enables the system to be designed with smaller pumps, smaller pipes, and lower electrical infrastructure costs.

| 2.2 |  The Design Tradeoff

In conventional heat exchanger design, increasing heat transfer typically means increasing pressure drop. Narrower channels, more turbulence, and higher surface roughness all improve thermal performance -- but at the cost of higher flow resistance. The best heat exchangers achieve high heat transfer without proportionally increasing pressure drop. This requires careful optimization of internal flow geometry, not simply making channels smaller or adding turbulence promoters.

| 3.1 |  Phasic's Approach

Phasic Energy designs heat exchangers that optimize the heat-transfer-to-pressure-drop ratio for each specific application. By engineering internal flow geometries matched to operating conditions, we deliver high thermal performance without the energy penalty that conventional designs impose. The result is lower total cost of ownership across the cooling system lifetime.