FAQ
Welcome to our FAQ section! Here you will find answers to frequently asked questions about our products eXergymachine-pro and eXergymachine-compact. If your question is not answered here, please do not hesitate to contact us. Contact us.
What distinguishes the eXergy machine from a heat pump?
The eXergy machine can work with high swelling temperatures of up to 60°C.
Where does it make sense to use the eXergy machine?
Wherever non-usable temperatures are present and can be made usable with the help of the eXergy machine. (For example, when using waste heat, to increase the yield of solar systems or, for example, to reduce the load on a heating heat pump - keyword: hot water preparation).
Can the output of the heat generator (e.g. a heat pump) be reduced with the eXergy machine?
By using the eXergy machine, the power rating can be measured at a different operating point. For example, at the operating point B0/W35 and not at B0/W55.
Can the efficiency of a solar thermal system be improved by the eXergy machine?
The exergy machine contributes to increasing the efficiency of a solar thermal system. Depending on the system, the increase can vary between 5 and 25 %.
Does it make sense to equip an old building with an air/water heat pump that runs at 55 °C in winter and generate higher heating flow temperatures of 70 to 80 °C in winter with an eXergy machine?
Yes, it is possible for the eXergy machine to provide these temperatures. However, the air/water heat pump should not be operated above 45°C for efficiency reasons.
Is the eXergie machine suitable for fresh water? (For direct use on the boiler?)
The eXergy machine is always used in the heating circuit; direct use in the drinking water system is not permitted.
Which refrigerant is used?
The refrigerant R134a is currently used. A changeover to R513a is planned as a first step.
Does the eXergy machine only work with storage units developed by varmeco or can another conventional storage unit with four connections also be used?
In general, every heating storage tank works with four connections. varmeco storage tanks are, however, optimized for operation (connection heights and number of connections, layering devices)
Can the eXergy machine be cascaded?
Yes, eXergy machines can also be cascaded.
How do you design such a system in terms of performance? For example, when using district heating?
It depends on the application. In the case of district heating, it is usually the circulation losses in the hot water supply that are used for the calculation.
Who can I contact for a possible concept with an eXergy machine?
Requests for a concept can be sent to planung@varmeco.de or info@bmspwer.com (for Switzerland).
Does the eXergy machine have an input for an external release, e.g. operation only with PV yield
Yes, the eXergy machine can be operated with the "PV-ready" function.
What are the application limits of the eXergy machine?
The application limits are a minimum source temperature of 20 °C and a maximum sink temperature of 80 °C.
What is the minimum temperature that can be fed into the eXergy machine?
The temperature should not be below 20 °C.
What is the maximum permitted temperature in the source circuit?
The temperature in the source circuit must not exceed 60 °C.
Does the eXergy machine also work with a source whose temperature varies between 20 °C and 55 °C?
Yes, the eXergy machine can adapt very well to changing source temperatures.
Can the eXergy machine controller be connected to a higher-level building automation system so that the values can be read out and changed via the BMS?
Yes, this is possible (via Modbus RTU Inferface for data points RS485; Modbus RTU/BacNet Gateway). This mainly supports read access to the controller.
How high are the maintenance costs for the eXergy machine?
The eXergy machine should be serviced every year. The costs amount to 525 euros.