Cooling Tower Motor Casing Cooling Using Recirculated Basin Fluid

Solution Overview

Problem

Existing wet cooling towers with direct-drive fan systems face challenges in managing motor temperature to prevent overheating or freezing, necessitating additional equipment that increases weight and cost.

Innovation Solution

A sealed, direct-drive motor with a fluid-cooled system that uses existing cooling tower fluid to transfer heat from the motor casing to the fluid, eliminating the need for auxiliary cooling devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If auxiliary cooling devices are added to cool the motor, then the motor temperature can be controlled, but the weight and cost of the cooling tower increase

Engineering Contradiction:

Improvemotor temperatureVSAvoidcooling tower weight

Core Design Contradiction:

TemperatureVSWeight of stationary object

Solution Approach 1:

The motor cooling function is merged with the existing cooling tower fluid circulation system. The motor casing acts as a heat exchanger that transfers heat directly to the cooling tower fluid, eliminating the need for separate auxiliary cooling devices. This integration allows the motor to be cooled using the same fluid that cools the cooling tower, thereby avoiding additional weight.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The cooling tower fluid serves multiple functions: it cools the fill material, condenses moisture, and simultaneously cools the motor through heat transfer across the motor casing. This multi-functionality eliminates the need for dedicated motor cooling equipment, reducing overall system weight and cost.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If auxiliary cooling devices are added to cool the motor, then the motor temperature can be controlled, but the cost of the cooling tower increases

Engineering Contradiction:

Improvemotor temperatureVSAvoidcooling tower cost

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The motor cooling function is merged with the existing cooling tower fluid circulation system. The motor casing acts as a heat exchanger that transfers heat directly to the cooling tower fluid, eliminating the need for separate auxiliary cooling devices. This integration allows the motor to be cooled using the same fluid that cools the cooling tower, thereby avoiding additional weight.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The cooling tower fluid serves multiple functions: it cools the fill material, condenses moisture, and simultaneously cools the motor through heat transfer across the motor casing. This multi-functionality eliminates the need for dedicated motor cooling equipment, reducing overall system weight and cost.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If the motor is sealed to prevent fluid entry, then the motor is protected from damage, but heat removal becomes more difficult

Engineering Contradiction:

Improvemotor protectionVSAvoidheat removal

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The motor casing serves as an intermediary heat transfer surface between the internal motor components and the external cooling tower fluid. Heat generated inside the sealed motor is conducted through the casing walls to the fluid flowing outside, enabling effective heat removal while maintaining the sealed protection of internal components.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The motor casing acts as a thin thermal barrier that allows heat conduction while maintaining structural integrity and sealing. The casing design optimizes thermal transfer properties to efficiently remove heat from the sealed motor interior to the external cooling fluid.

Inventive Principle:

Principle #30Flexible shells and thin films

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Maintains optimal motor temperature for efficiency by transferring heat effectively, preventing damage from excessive heat or freezing, while reducing weight and cost through the use of a sealed motor and fluid-cooled system.

Implementation Method 1

existing cooling tower fluid is applied to the exterior surface of the motor casing in order to achieve a transfer of heat from the motor casing to the fluid thereby substantially reducing or removing the heat from the casing

Methodology Applied

Scientific EffectHeat transfer: Heat Exchanger

Data Source

PatentUS12537420B2Cooling tower having thermally managed motor

Publication Date: 2026.01.27 PRIME DATUM DEVELOPMENT CO LLC

AI summary

The present disclosure is directed to a cooling tower including a cooling tower structure including fill material supported by the cooling tower structure and configured to receive heated process fluid and a motor mounted to the cooling tower structure. The motor includes a casing and a rotatable shaft and is sealed to prevent fluids, moisture, foreign particles and contaminants from entering the casing. A fan is connected to the rotatable shaft of the motor. Rotation of the rotatable shaft rotates the fan thereby inducing an upward moving mass flow of cool air through the fill material. A basin is attached to the cooling tower structure for collecting cooled fluid. A fluid distribution system distributes the cooled fluid in the basin. The fluid distribution system includes a pumping device to pump cooled fluid from the basin, fluid piping to receive the pumped cooled fluid and fluid spray devices fluidly connected to the fluid piping for spraying fluid on the casing of the motor so as to transfer heat of the casing to the fluid.