Radiator Wind Tunnel Test Bench (Dual Air Chambers)

Overview

This radiator performance wind tunnel test bench is designed for testing the cooling performance of radiators used in automotive, tractor, and construction machinery engines. The test bench integrates tests for water radiators, heater tanks, air-cooled oil radiators, and intercoolers in a single unit.

Design Philosophy

Based on current trends and demands in the development of various automotive cooling systems, this approach leverages advanced design concepts as well as high-precision and highly stable testing instruments. It also employs more realistic test methods to simulate real-world driving conditions from a testing perspective, making it suitable for performance testing of a wide variety of automotive heat exchangers. The ultimate goal is to provide practical evidence for the design and improvement of heat exchangers.

Design Principles

( 1 ) Practicality: Primarily used for performance testing of various automotive radiators.

( 2 Reliability: Fully consider the impact of factors such as ambient temperature, humidity, and electromagnetic interference on the equipment. Therefore, the measurement and control system ( PLC ) All components are sourced from internationally renowned brands to ensure the system operates reliably, stably, and for the long term.

( 3 ) Expandability: PLC The system can add functional modules at any time as needed. On the one hand, it allows for the rapid integration of new devices; on the other hand, it enables users to carry out secondary development.

( 4 ) Safety: Properly handle the power supply and grounding of electrical systems to ensure personnel safety.

( 5 ) Intelligence: The system’s design aims to maximize its intelligence and minimize manual intervention as much as possible.

( 6 ) Ease of operation: The host computer’s human-machine interface is aesthetically pleasing and easy to use.

( 7 ) Easy maintainability: All mechanical and electrical equipment uses commonly available products from both domestic and international suppliers, ensuring convenient system maintenance.

Principle of the experimental work

  1 . Basic principles

As the air flow provided by the wind tunnel system passes through the heat exchanger, it undergoes a heat exchange with the hot fluid inside (the heat-transfer medium in the radiator component), thereby absorbing the heat released by the heat-transfer medium.

When the heat exchange process reaches the thermal equilibrium criteria, the measurement system automatically collects data on various physical quantities.

  2 . Control of various physical quantities during the process

    Lower level PLC The system automatically adjusts the motor speed and the opening of the bypass electric valve via closed-loop control, thereby achieving precise control over the flow rate of the thermal medium.

    The power of the heating device is automatically adjusted by the power controller to maintain a constant medium temperature.

The wind tunnel speed control system automatically adjusts the fan speed to keep the wind speed stable within the range required by the test conditions.

  3 . Data processing

    Using the host computer, the various physical quantities collected during the above process are subjected to heat transfer calculations based on the principles and methods of heat transfer and thermodynamic calculations for heat exchangers, thereby determining the heat absorption and heat release rates and compiling the corresponding results, such as the heat transfer coefficients.

    In performing the above calculations, to improve the accuracy of the air mass flow rate, the effects of factors such as atmospheric pressure and humidity are also taken into account when calculating air density and specific heat capacity of air.

The format of the data processing results complies with the requirements of relevant standards.

Main functions and features:

1 We use high-quality domestically produced fans driven by imported frequency converters, offering stepless speed regulation for smooth operation and significant energy savings. The wind speed is measured using a cross-sectional wind-measuring device, ensuring even greater measurement accuracy.

2 The flow rate of the circulating water is regulated and controlled by the inlet frequency converter. PID ), rapid flow regulation, precise flow control, and compatibility with specimens of various specifications and models;

3 The measurement of gas, air, and water (or oil) employs a modular structure for synchronous measurement with no time lag.

4 Air inlet and outlet temperature acquisition method: Establish a temperature field for high measurement accuracy;

5 , select WIN CC The configuration software provides a development environment with a user-friendly human-machine interface and an aesthetically pleasing, elegant screen display.

6 High degree of automation reduces the impact of human operator error on test accuracy and minimizes manual involvement.

7 To ensure the system’s reliability, advanced technology, good repeatability, and upgradeability, all primary instruments are selected from currently available, cutting-edge, and mainstream products with strong market viability. In the near future... 20 The year cannot be eliminated.