Image Calibration of Low Temperature Sensors
Image Humidifier System for High-Purity Gases
Image Low noise and non metallic liquid-helium cryostat
Image Cold meter
Image Cryostats, Non-Metallic and Metallic
Image Micro fluidic expansion valve
Image Test rigs for refrigeration and heat pump technology
Image Non- invasive flow measurements
Image Leak Detection and Tightness Test
Image Behavior of multiphase cryogenic fluids
Image Certifiable connection types in cryogenics
Image Lifetime prediction of hermetic compressor systems
Image Intelligent innovative power supply for superconducting coils
Image Filter Tests
Image Software for test rigs
Image Air-water heat pumps

You are here:  Home /  Software Development


Reducing the filling quantity

BMWi EuroNorm INNO-KOM

03/2019-06/2021

K. Bratanitsch

+49-351-4081-641

in Progress

How much refrigerant must be filled?

Due to the F-gas regulation of the EU, synthetic refrigerants are becoming increasingly expensive and more difficult to obtain. The synthetic and partly natural substitute refrigerants are often flammable or toxic. The remaining synthetic refrigerants with low hazard potential are becoming more and more expensive and some of them still have a significant global warming potential. For this reason, it makes sense to keep the filling quantity of all new refrigeration systems as low as possible. Historically, refrigeration plants have usually been built without much consideration for the filling quantity of the plant. Often even large collectors were installed in order to always have a sufficient filling quantity without exact calculation and to compensate for the loss of refrigerant between the service intervals.

In this project, possible actions are investigated, which lead to significant reductions in refrigerant filling quantities already in the design and construction phase. In particular, the necessity and size of refrigerant receivers will be investigated. Except for a refrigerant receiver, the largest refrigerant quantities are found in the heat exchangers of the refrigeration cycle, i.e. in the condenser up to 50 % (according to other literature sources even up to 65 %) and in the evaporator up to 25 %. As a result, very strong levers for reducing the refrigerant charge can be seen in these components. Therefore, the necessary filling quantity of different heat exchangers should be examined and measured in detail. Thereby classical tube-fin, microchannel and plate heat exchangers shall be investigated.

As a result of the project, a new method is to be developed which takes into account a maximum possible reduction of the refrigerant charge quantity from the outset when planning and designing a refrigeration system.

Based on the first results and previous experience we can offer calculations of the filling quantity. Furthermore, a program for calculating the filling quantity is in preparation.

 


Your Request

Further Projects - Software Development

Image

Software for technical building equipment

Design cooling load and energetic annual simulation (VDI 2078, VDI 6007, VDI 6020)


Contact

Institut für Luft- und Kältetechnik - Gemeinnützige Gesellschaft mbH
Bertolt-Brecht-Allee 20, 01309 Dresden


Secretary to the Management

+49-351-4081-520

+49-351-4081-525

Image ISO 9001
Bild Zuse Mitglied Bild SIG