Application
Dynamic water conditioning with precise volume flow control
High performance water conditioning systems for the use in transmission function test benches to ensure efficient cooling with a large volume flow spread and a wide temperature angle.
The compact design ensures flawless integration into any test bench environment. The system is maintenance-friendly and designed to withstand long-term operation using a huge variiety of components from the field of process technology.
The temperature is controlled with an internal inlet sensor in the system or with an external sensor, that can be connected to the system's patch panel.
The fan installed in the system, in conjunction with the Windows client application, enables the system to operate almost autonomously - without integration into test bench architectures.
Measurement data for volume flow control (-> dark blue: temperature inlet actual value, -> brown: volume flow actual value, -> orange: volume flow setpoint). The target and actual volume flow is plotted (left axis). The volume flows are regulated precisely within a few seconds and without overshoot.
The precise temperature in the flow is shown on the right axis - despite rapid changes in the volume flow.
Measurement data for a 20kW jump in performance of the test specimen (-> dark blue: temperature inlet actual value, -> red: temperature outlet actual value). The temperature behavior in the flow (left axis) and the return (right axis) is plotted. The heat load introduced is clearly visible in the return temperature. The volume flow is 20 liters per minute. The temperature control system keeps the temperature stable at approx. +- 0.1K despite extremely high short-term heat loads.
Benchmarks:
Medium: Water/glycol
Temperature range: up to +130°C
- Volume flow: 0 to 40 L/min
- Electric heating output: 6 kW
- Controls: volume flow, temperature (internal / external)
- Control principle: Gear pump with servo drive
- Volume flow measurement: MID
- Container pressure range: 0 to 2.5 bar relative
Accuracy temperature: < 0.1 K stationary
- Accuracy temperature: < 0.5 K fluctuation with 20kW power jump of the DUT
- Safety: Limit value monitoring and integrated safety module with an external emergency stop connection, backpressure-dependent flow restriction, software-configurable for component protection.
Interfaces: EtherCAT, CAN, analog, client
- Design: Mobile on casters, compact construction
ECO mode: Save energy without compromising performance
We have introduced the ECO mode for test scenarios with low dynamic requirements. In this operating mode, the dynamic range of various actuators is limited and actuators are operated in the most efficient range. This means that up to 30% of electrical power consumption can be saved without significantly affecting the control quality, as the following measurement plot impressively shows:
Measurement data from a temperature level test in ECO mode. (-> green: temperature inlet setpoint, -> dark blue: temperature inlet actual value). The temperature levels are approached cleanly and kept stable without major overshoots or undershoots.
Benefits
Powerful conditioning unit, perfectly tailored to your application.
Extraordinary control quality
Precise control of temperature and volume flow – even with demanding dynamic processes.
Compact design
The two independently acting conditioning systems for air and medium allow the simulation of entanglement states with a difference of up to 130°C.
Interfaces
The system has a total of four interfaces (EtherCAT, CAN, client and analog) for flexible integration into different test bench environments.
ECO-Mode
Depending on the operating mode, up to 30% energy can be saved in ECO mode. And thanks to state-of-the-art control strategies, this occurs without any major losses in temperature control performance.
