Boiler Blowdown Calculator — Calculate Blowdown Rate & Water Loss

Boiler Blowdown Calculator

Calculate boiler blowdown rate, water and heat loss, and cost savings. Optimize your boiler’s efficiency and reduce energy costs with proper blowdown management.

Step 1: Boiler Operating Conditions

Understanding Boiler Blowdown

Blowdown is necessary to control dissolved solids in boiler water. Excessive blowdown wastes water, heat, and chemicals, while insufficient blowdown can cause scaling and corrosion.

Step 2: Water Quality & Blowdown Parameters

About TDS Control

The blowdown rate is determined by the ratio of feedwater TDS to boiler water TDS. Higher TDS in feedwater requires more blowdown to maintain safe boiler water concentration levels.

Blowdown Calculation Results

Summary
Blowdown Methods
Cost Analysis

Required Blowdown Rate

3.45%
Blowdown Flow: 345 kg/h
Blowdown Rate
3.45%
Blowdown Flow
345 kg/h
Heat Loss
850 kWh
Annual Cost
$12,450

Blowdown Methods Comparison

Blowdown Method Typical Rate Efficiency Heat Recovery Annual Savings Potential

Blowdown Cost Breakdown

Blowdown Calculation Formula

Blowdown % = (Feedwater TDS / (Boiler Water TDS – Feedwater TDS)) × 100

The blowdown rate is calculated based on the concentration of dissolved solids. Proper blowdown control optimizes boiler efficiency while preventing scale formation and corrosion.

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