PDF Publication Title:
Text from PDF Page: 004
Güntner Event 1st place for optimum energy operating point The German Refrigeration Award is a competition run since 2008 by the German Fed- eral Ministry for the Environ- ment, Nature Conservation and Nuclear Safety in cooperation with the non-profit consultancy firm, co2online, and the Kälte study group. The three best concepts in three categories each are awarded a prize by a jury of experts. For his ground breaking energy-saving devel- opment, the Energy Balance Function (EBF), Peter Roth, Head of the Basic Development department at Güntner AG & Co. KG was awarded first place in the “Refrigeration or air-conditioning special applications” category. The award winner comments: “We are the first heat exchanger manufacturer to have had any kind of controller at all for condensing pressure control in their standard range. This was the GDR Controller, our first ‘green product’. Here in our company we have always focussed accordingly and kept the energy efficiency topic clearly in our sights. It was actually the GDR that brought me to the idea for the Energy Balance Function (EBF). The GDR already had the ambient temperature-dependent set point shifting* function, which the Güntner Motor Manage- ment (GMM) will also feature. As customers then approached us about this, I became curious and got busy with the function’s physical background. This led to the question of how energy savings could be further Left to right: State Secretary Jürgen Becker; Roland Handschuh (Güntner); award winner Peter Roth (Güntner) Photo: Ingo Heine 6 Güntner heatXchange 18 optimized with appropriate fan control. And the result is the EBF.” Previous standard function: Ambient temperature-dependent set point shifting With the previous ambient temperature- dependent set point shifting standard function the condensers are controlled from a fixed limit value of the condensation temperature. With the new algorithm, the Energy Balance Func- tion, the joint power consumption of the com- pressor and the condenser fans is minimised. In refrigeration and air-conditioning technology, it applies as an accepted fact that in a refriger- ating or air-conditioning circuit, the compres- sor is the component with the highest energy consumption. If you assume full load operation of the system under observation, there is no objection to be made against this assumption. But what happens in the refrigeration circuit if we assume partial load operation, as is frequently the case in the real world? * Ambient temperature-dependent set point shifting has already been provided by Güntner for several years for control- ling condenser and drycooler fans. You will find a detailed description of this function in heatXchange 16 on page 17. http://www.guentner.eu/company/news/ customer-magazine-heatxchange Total power consumption of a refrigeration system depending on the condensation temperature and the current condensing capacity. 200 180 160 141021000 P_g min [kW] 80 70 60 50 40 P_g [kW] 30 20 10 0 44 46 48 50 Practical situation in refrigeration systems An energy-conscious system operator tries to operate their refrigeration or air-conditioning system at the lowest possible condensation temperature. They therefore set their set point on the condensation pressure controller to +25 °C, for example. Theoretically, therefore, the condensation pressure set point then cannot be reached on a warm summer’s day with air temperatures above +25 °C. As a result, the fans run at full speed all the time. This status is absolutely right and helpful if the system has to handle a high load. But if the system is in a lower load state, because, for example, most of the consumer units are switched off, but a few cooling units still have to run, the compressor load is significantly reduced. Only now can the energy-unfriendly case occur, whereby low power consumption on the compressor opposes high power con- sumption on the condenser fans at full speed. With systems whose condensation set point is too high, which, unfortunately, is frequently the case, the condensation temperature would be set below the set point. The stan- dard condensation control now takes effect Energy savings at Energy savings at Energy savings at Energy savings at Energy savings at and reduces the speed of the fans until the set point is reached. An apparently plausible situation, partial load and reduced fan speed, which however, conceals the fact that the system is basically being operated with pressures that are too high, and therefore the compressor’s power consumption is too high – a condition that could be avoided with the correct control. The new control algorithm: Energy Balance Function The new Energy Balance Function control function is designed to determine the optimum energy operating point for different framework conditions. In short, you could say that the EBF enables specific partial load states to be al- located to the optimum energy fan speed while incorporating the energy ratio of the condenser. The most important influence factors are the refrigerant used, the energy ratio, the configura- tion conditions of the system, the compressor’s level of effectiveness and the current operating status data of the condenser. Compared with the standard control, the energy saving at the respective operating point could be up to 30 %. Energy saving with optimized condenser control compared with standard control R134a; t0 = -10 °C; tLE = 25 °C; tc_min = 25 °C High energy-saving potential Peter Roth comments further: “This can save a lot of energy. Depending on the partial load behaviour, this energy saving can be between 7 and 30 %. If this innovation were used with all refrigeration and air-conditioning systems in Germany, we could save 300,000 tons of CO2.” The award also has prize-money of EUR 10,000. The money will be invested in further developing the algorithm, so in addition to condenser fan control, drycooler fan control will also be possible in the future. At the moment it is still a theoretical model, but down the line this algorithm will be indispensable for the practical handling and controlling of energy consumption with condenser and drycooler fans. The Energy Balance Function will be integrated into the Güntner Motor Management (GMM). You will also find a detailed description of what a generally applicable mathematical model for describing this task might look like and the information that can be derived from it at: http://www.guentner.eu/company/ news/guentner-press-center/ Partial load 7 Q_c [kW] 80 40 42 60 40 32 34 36 38 t_c [°C] 20 28 30 70-80 60-70 50-60 40-50 30-40 20-30 10-20 0-10 Current energy savingsPDF Image | heat X Change
PDF Search Title:
heat X ChangeOriginal File Name Searched:
588_heatxchange_18_en_web.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)