HVAC & energy engineering
EP Ehrler Prüftechnik Engineering provides innovation
In HVAC engineering in particular, the testing procedures in many manufacturing processes and methods are by far not as detailed and accurate as, for example, in the automotive industry. We see enormous potentials for energy saving in this field by increasing energy efficiency. Example: So far, hot water storage tanks go through visual inspections only in manufacturing. With state-of-the-art test methods and advanced measurement technology, testing can be largely automated to avoid subjective sources of error. We at EP can develop customised solutions for any demand or requirement to measure and test your specific products.
These are our test benches:
For better energy efficiency: test bench for gas heating systems
The test benches have been designed for the final testing of gas heaters from 15 kW to a maximum of 300 kW. The specific test items are inserted manually or in a semi-automated way. The test is carried out automatically except for manual settings and visual inspections which have to be confirmed. A computer is used for operator interaction, to control the test workflow, and to evaluate the measurement results. To carry out maintenance or calibration work, the programme offers a manual mode which allows to configure or read individual channels on the I/O level. The step mode allows to carry out individual test steps which provides efficient test and service options. Individual measurement and adjustment processes are very short to reduce possible errors and costs.
For a long service life: our test bench for solar panels
The system is used to test solar water heating absorbers for tightness and leakage in final manufacturing inspection. So far, this inspection was carried out manually and was therefore very error-prone. The new system is fed manually, but controlled automatically. Measurement data is also captured automatically which results in a significant increase in the quality of the results. A computer with the required add-on hardware is used to control the system and enter and visualize the data. The leakage test is performed as pressure drop method with relative pressure sensors using tap water. The system is emptied before it is filled with water. The test unit contains a measurement track for an alternating leakage test of absorbers vertically or horizontally. A piston displacement system which is started automatically with each test run is used to monitor the proper functioning of the leakage test system. Exchanging parts is not necessary – the system detects the respective type automatically when the test item is inserted. The test bench represents the key element in solar panel manufacturing. All panels are tested for their manufacturing quality to ensure service life over many decades.
As accurate and flexible as it gets: test bench for HVAC units
The HVAC test bench is used to calibrate ventilation and air conditioning units. The test bench provides an adjustable air volume flow where the physical parameters of temperature and air humidity of the work area can be set to any desired value.
These ventilation and air conditioning units are used for air conditioning in buildings. The units are used to condition fresh and exhaust air in a building according to the ambient conditions.
The EP test system offers two air handling units (AHU) with predefined states which are used to adjust and set the test item. AHU1 simulates the building by creating the conditions which may occur in the building (heating, cooling, humidifying). AHU2 simulates the outside air by preconditioning the temperature and humidity of the air sucked in by the test item.
The customer can analyse the values measured for the specific test items. The input conditions to be used for the test item can be entered via the test computer or the customer PC. The interface is a PROFIBUS system.
