⚡ AnythingOnline
❄️
Evaporative Condenser Water Makeup Calculator mechanical
100% Free • No Sign-Up

Evaporative Condenser Water Makeup Calculator

Determine evaporation, blowdown, and drift loss rates to calculate total fresh makeup water consumption (GPM and gal/day) for industrial refrigeration condensers.

Heat Rejection Capacity

15,000 BTU/hr per Condenser Ton
Internal recirculating water spray
Typical industrial range: 3.0 to 5.0

Operating Schedule & Utility Cost

Water Consumption Balance

Total Makeup Water Required
-- GPM
-- Gallons / Day
Evaporation Rate (E)
-- GPM
--% of total makeup
Blowdown Drain Rate (B)
-- GPM
-- GPM drift loss
Annual Water Utility Bill: $ -- / yr
Total Heat Rejection (MBH): -- MBH
Water Makeup Pipe Minimum Size: --
Increasing cycles of concentration from 2.0 to 4.0 cuts blowdown sewer discharge by 66%, saving tens of thousands of gallons of water annually.

Recommended Tools & Equipment

Tested hardware and components for high reliability

100% Free Tool Zero Sign-Up

Frequently Asked Questions

What are Cycles of Concentration (CoC) in evaporative cooling equipment?

Cycles of Concentration (CoC) is the ratio of dissolved mineral solids in the recirculating basin water compared to the mineral concentration in the fresh makeup supply water. As pure water evaporates, minerals stay behind. If basin water has 800 ppm TDS and makeup has 200 ppm TDS, the condenser operates at 4 Cycles of Concentration.

How is cooling tower and evaporative condenser blowdown calculated?

Blowdown (or bleed-off) is the deliberate discharge of mineral-concentrated basin water to the sewer to prevent scale and mineral precipitation on condenser tubes. It is calculated by dividing the evaporation rate by one less than the cycles of concentration: Blowdown = Evaporation / (CoC - 1).

Why does high water hardness cause scale on evaporative condenser tube bundles?

Evaporative condenser tubes operate at hot refrigeration discharge gas temperatures (100°F to 180°F / 38°C to 82°C). Calcium and magnesium bicarbonates exhibit inverse solubility (they become less soluble at higher temperatures), causing dense, rock-hard scale to bake directly onto the outer tube surfaces, suffocating heat transfer and spiking compressor head pressure.