Closed Circuit Evaporative Cooling Towers

Cross Flow Cooling Tower A Cross Flow Cooling Tower is a design where airflow is perpendicular (horizontal) to the downward flow of water within the tower. This configuration offers distinct operational and maintenance advantages, making it common in commercial HVAC, power plants, and industrial applications How It Works Air...

Counter Flow Cooling Tower Advantages Better Freeze Protection: In cold climates, airflow distribution reduces freezing risk in fill areas

Cooling Tower Design Types

Forced Draft vs. Induced Draft (Closed Circuit) which one is best? Head-to-Head Comparison: Critical Decision Factors Factor Forced Draft (V-Flow) Induced Draft (Typically Counter-Flow) Who Wins? Maintenance & Fan Life Big Advantage. Fan & motor are at ground level in the cool, dry inlet air stream. Easier, safer access. Less...

Typical Applications of Forced Draft V-Flow Closed Circuit Cooling Tower Closed circuit cooling towers are used where protecting the process fluid is paramount:

Working principle of Forced Draft V-Flow Closed Circuit Cooling Tower  1. Process Circuit (Closed Loop): 2. Spray Water / Evaporative Circuit (Open Loop): 3. Air Circuit (Forced Draft):

Advantages of Closed-Circuit Cooling Towers (All Types) Lower System Pumping Head: Often located at grade level, unlike open towers which may be on roofs Reduced Maintenance on Primary System: Less corrosion and fouling in the chilled water or process loops.

Comparison of Forced Draft vs Induced Draft Vs Hybrid Closed Circuit Cooling Tower Feature Forced Draft (V-Flow) Induced Draft (Counterflow) Hybrid (Dry/Wet) Air Flow Fan pushes air horizontally in/vertically out. Fan pulls air vertically up through the unit. Typically induced draft. Footprint Compact. Larger footprint for same capacity. Larger due...

Closed Circuit Fluid Coolers with Integral Freeze Protection

Hybrid (Dry/Wet or Adiabatic) – Closed Circuit Cooling Tower

Forced Draft Closed Circuit Cooling Tower

CLOSED-CIRCUIT Cooling Tower Open Circuit Tower Closed Circuit Tower   Cost Win on First Cost Win on Lifecycle Cost Protection Exposes the process fluid Protects the process fluid Operation Higher water/chemical use, higher pumping energy Lower water/chemical use, lower pumping energy Best For Non-critical cooling, budget-driven...

Closed Circuit cooling tower vs open circuit cooling tower The choice between a Closed Circuit Cooling Tower (CCT) and an Open Circuit Cooling Tower (OCT) is one of the most fundamental decisions in cooling system design. It boils down to a trade-off between initial cost and system protection/lifecycle cost....

Why Choose a Closed Circuit Cooling tower  in These Applications? A Quick Reference Table Application Category Primary Reason for Using a CCT HVAC / Chillers Protects chiller tubes from scaling; enables easy winter glycol use. Plastics, Lasers, Medical Absolute fluid cleanliness to protect multi-million dollar equipment and ensure product...

Closed circuit cooling towers are chosen where the purity, pressure, or specific chemistry of the process coolant must be maintained.

FILL CONFIGURATION & ORIENTATION Based on Air/Water Flow: Fill Block Geometry:

TYPES OF FILLS Fills are categorized by their heat transfer mechanism and material. 1. Splash Fill 2. Film Fill 3. Hybrid / Trickle Fill Mechanism: Combines features of both splash and film fill. Upper section may be splash for water

FILLS (Cooling Tower Fill / Packing) Definition & Core Purpose Fills (also called packing or wetted deck) are the heart of the cooling tower’s heat transfer system. They are internal structures designed to maximize the surface area and contact time between the falling hot water and...

Single Cross flow Double Cross flow   Strengths • Simple, lower cost (small scale)• Better for tight, one-sided spaces• Easier freeze protection • High capacity in compact length• Better airflow symmetry• Lower height profile• Economical at large scale Weaknesses • Limited capacity per length• Can have uneven airflow• Not...

Cooling Tower Selection Guidelines: When to Choose Which? Choose SINGLE CROSSFLOW when: Choose DOUBLE CROSSFLOW when: Economies of scale are desired for large industrial installations (lower cost per ton Performance Considerations

DOUBLE CROSSFLOW vs. SINGLE CROSSFLOW COOLING TOWER Comparison Overview Both are induced draft, crossflow towers using gravity distribution and horizontal airflow. The core difference is air entry from one side vs. two sides, leading to significant practical implications. Core Definition Recap Feature Single Crossflow Double...

COOLING TOWER WATER QUALITY PARAMETERS & CONTROL Parameter Target Range Reason / Effect pH 7.5 – 9.0 Low pH: Corrosion. High pH: Scaling, reduced biocide efficacy. Conductivity (TDS) Controlled via COC Direct measure of dissolved solids. Used to control blowdown. Alkalinity (M-Alk) 50-300 ppm as CaCO₃ Buffer for pH, relates to scaling...

COOLING TOWER WATER BALANCE Core Principle A cooling tower operates on a closed-loop recirculation but experiences continuous water loss. The Water Balance accounts for all water entering and leaving the system to maintain a steady-state operation and control dissolved solids concentration. 1. COMPONENTS OF THE...

COMPONENTS OF A COOLING TOWER Overview A cooling tower is a system of integrated components designed to maximize heat transfer through evaporation. Each part has a specific function critical to performance, efficiency, and reliability. Components vary slightly by tower type (natural draft vs. mechanical draft, Cross Flow vs. counter...

COOLING TOWER MATERIALS Overview Material selection is critical for cooling tower longevity, performance, and cost. The choice depends on corrosiveness of water/air, temperature, structural requirements, budget, and maintenance philosophy. Here’s a breakdown by component: 1. STRUCTURAL CASING & SUPPORTS Fiber Reinforced Plastic (FRP)...

FACTORS AFFECTING COOLING TOWER PERFORMANCE Factor Effect on Performance Typical Symptoms Fouled Fill Increased approach, higher pressure drop Reduced cooling, higher fan amps Clogged Nozzles Poor water distribution, dry spots in fill Uneven cooling, higher approach Worn/Clogged Drift Eliminators High static pressure, reduced airflow Reduced...