Test Chambers for Heat Pumps
As countries look to integrate renewable sources of energy into their national electricity grids, heat pumps continue to gain acceptance in many regions as a viable means of controlling indoor temperatures.
Testing of these systems, though complex, is essential to accurately measure a product’s coefficient of performance (COP) and help purchasers make an informed choice. These tests rely on a tightly controlled and stable environment in which the heat pump can operate.
Sharetree’s range of walk-in chambers can provide the test environment required by a whole range of standards for air-source heat pumps, such as EN 14511 and EN 16147:
- The chamber delivers a gentle, laminar air flow with accurate and precise control of temperature and relative humidity.
- The heat pump takes in this air and extracts its thermal energy.
- This energy is transferred to a water or space heating system and the results are measured to calculate the COP.
Possible testing configurations include:
Single chambers for testing air-to-water heat pumps (for domestic hot water and central heating systems)
Split chambers for testing air-to-air heat pumps (used in smaller properties such as apartments)
|High performance||Laminar air flow (adjustable down to <1.5 m/s) from left to right across the chamber – maintains uniform and stable conditions throughout the internal space|
|Combination of dried air and demineralised water spray used to control relative humidity at a range of temperatures to simulate different weather conditions (e.g.|
|PT100 sensors for stable and reliable temperature measurement|
|Capacitive humidity sensor gives optimum combination of accuracy, rapid response and reliability|
|Chambers built from high quality components ensuring long service lifetimes|
|Test conditions rapidly established following system start; fast recovery from defrosting cycles (usually within 10 minutes)|
|Customisable||Wide range of volumes and dimensions available, with high ceilings to avoid heat pump recycling its exhaust air|
|Designed following site visit to maximise use of space in your facilities|
|Environmental control systems can be tailored to meet minimum temperature, cooling rates and relative humidity requirements|
|Extensive range of port and panel options available for interfacing with systems under test (for passing liquids, power cables, data communications, etc.)|
|Labview-based user interface developed by Sharetree, subscription-free and easily customised|
|Safe to use||Essential safety features included as standard: • emergency pull cords • internal door release • slip-resistant flooring|
|Option for ATEX-rated internal volumes for testing systems that contain propane-based refrigerants|
|Detection system for multiple gases (including oxygen depletion) and infrared fire detection|
|Easy to use and maintain||Factory-calibrated and expertly installed for you by Sharetree|
|Uses readily available components for long-term maintainability|
|PC-based touchscreen control panel – connects to industry standard PID controller that is readily maintained or replaced, minimising downtime|
|Key Specifications (typical values)|
|Temperature fluctuation||± 0.5||°C|
|Temperature range (unloaded)||-40 to +60||°C|
|Temperature range with load (optimised to meet specification)||-22 to +50||°C|
|Ramp rate to -22°C with load||0.5||°C/min|
|Maximum cooling load||20||kW|
|Maximum mass of load (distributed)||1500||kg|
|Parameters above are for standard models; for information on customised system performance, please contact Sharetree.|