The ILK Dresden has an accredited testing laboratory and offers independent tests for the following certification bodies, organisations or quality labels:
- EHPA Quality Label Heat Pump
- Keymark certification
- Tests according to ErP
- Verification test of efficiency for state subsidies
(e.g. BAFA, MCS, Harp)
Various types of brine to water heat pumps are tested in the ILK test laboratory - PLWP. Tests are carried out on
- fix speed heat pumps
- variable speed heat pumps
- heat pumps with special design (direct condensing, with thermal storage, etc.)
The brine (water) water heat pumps are tested on a semi-automatic test rig.
The Prüflabor Wärmepumpen is accredited to DIN EN ISO / IEC 17025 for the following performance and sound measurements
- DIN EN 14511, DIN EN 14825 and DIN EN 16147
- DIN EN 12102 and DIN EN 9614
Research and Development
We support the industry in its efforts to develop energy-efficient refrigeration systems and heat pumps.
The ILK Dresden has been active in the development and testing of refrigeration and heat pump technology for many years. The development work is carried out individually and in close cooperation with the client. The experiences of the ILK Dresden were and are continuously collected in a multiplicity of research projects.
In recent years, for example, the development of a high-temperature heat pump with operation temperatures above 120 °C has been an important research project.
Within the limits of our flexible accreditation, further measurement tasks can be carried out in accordance with applicable testing standards. Outside accreditation, further services can be offered:
- Performance testing of WP with storage tanks
- dynamic power measurements by means of temperature and power profile
- Investigations of the cooling circuit of the heat pump
- Expert opinions and evaluations of individual components
- Characterisation of the operating behaviour of the heat pump
- Refrigerant and material testing
- Modifications of the systems by qualified refrigeration technicians on site in consultation with the customer
Short description of test procedure
The measurements of the heat pumps are carried out in accordance with current valid guidelines (ErP) and standards DIN EN 14511 or DIN EN 14825. If required, minor deviations are possible due to our flexible accreditation (see below Annexes to accreditation, p. 3)
The testing of the heating capacity is normally based on the water-enthalpy method. For this, the water mass flow and the temperatures are measured directly at the inlet and outlet of the heat pump. The test points are based on the current guidelines and test standards of certification bodies, quality labels (EHPA guidelines) and current standards.
Heat pumps with fixed-speed compressors and power-controlled heat pumps can be tested. Outside the accreditation of the Prüflabor Wärmepumpen, dynamic tests under changing conditions depending on the heat load are also possible. For this purpose, appropriate temperature and heat load profiles can be specified.
The brine (water) water heat pumps are tested on a semi-automatic test bench. The performance data of the test bench are given in the following tables.
Leistungsdaten Prüfstand
Heat source brine / water
| Measured variable | Unit | min. range of application | max. range of application |
|---|---|---|---|
| Volume flow/td> | m³/h | 1 | 25 |
| Brine temperature at inlet | °C | -15 | 40 |
| max. pressure loss | bar | - | 4 |
Heat sink water
| Measured variable | Unit | min. range of application | max. range of application |
|---|---|---|---|
| Heating capacity | kW | 4 | 100 |
| volume flow | m³/h | 1 | 20 |
| Water temperature at inlet | °C | +3 | +70 |
| max. pressure loss | bar | - | 4 |
Electrical power measurement
| Measured variable | Unit | min. range of application | max. range of application |
|---|---|---|---|
| Power consumption | kW | 0,5 | 30 |
| Frequency | Hz | Netzfrequenz (50) | Netzfrequenz (50) |
| Voltage | V | 1~/230 | 3~/400 |
| Current | A | 2 | 40 |