ENVIRONMENT-FRIENDLY HEATING WITH R290 HEAT PUMPS. Dr. Joachim Maul - Brussels, 15th of October 2013
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1 ENVIRONMENT-FRIENDLY HEATING WITH R290 HEAT PUMPS Dr. Joachim Maul - Brussels, 15th of October 2013
2 CONTENT 1. ait-deutschland 2. LWD a R290 heat pump 3. Experience with R Conclusion
3 AIT-DEUTSCHLAND Company is member of NIBE Location: Kasendorf (Bayern, D) Founded 1998 Staff: 450 Capacity: units p.a. Products: Heat pumps in the range 3-160kW (Air, Brine, Water) Sales of Heat Pumps in 21 european countries Chillers from 1kW 800kW Sales of Chiller: worldwide
4 HEAT PUMPS Professional heat pumps for hotels heat pumps for residential units professional heat pumps for commercial buildings Individual heat pumps for single family homes Heat pumps for multiple family homes
5 VOLUME OF THE EU-MARKET sum EU-14 sum EU Between 2005 and 2012 more than 5,4 Mio HP s are installed in Europe * Source: EHPA, 2013
6 LWD R290 HEAT PUMP LWD 5 9kW Decision for R290 due to possibilty to reach flow temperatures up to 70 C Water temperature 62 C at -20 C possible without additional electrical heater Long time availability and low GWP: 3 Suitable for renovation markets
7 COMPARISON R290/R407C
8 EXPERIENCE WITH R290 What have we done? - No special construction details except plate heat exchanger and sealing of the electrical box (marginal higher price) - Only R290 approved components are used (due to our experience no additional costs) - From beginning of the project TÜV and VDE were involved - Safety concept was approved and verified by both - Saftey tests were performed to be sure that in case of leakage no propane can ignite
9 EXPERIENCE WITH R290 Can R290 be used in a mass production? Yes! - Additional sensor at filling station in production and test facilities - Additional test due to pressure directive and test of tightness of electrical box - Costs for R290 is in the range of HFC s - Pressure in the system is in the range of other refrigerants - But not every oil can be used
10 EXPERIENCE WITH R290 Experience with R290 as a refigerant -Training of production staff, service technicians and customers mandatory like it is for every refrigerant - Easy to handle in production and service because it is no mixture (temperature glide) - Refrigerant is long time available future planning reliability for manufacturer and customer - Additional manufacturing costs compared to HFC s are low and acceptable - Less components than compressors with EVI technology
11 R290 AS A REFRIGERANT FOR ALL HP Is R290 a refrigerant for all heat pumps? Due to its thermodynamic behaviour It is a good refrigerant for all heat pumps, but - Components (like compressor) covering the complete capacity range are not available today - Additional research/investigation for the general usage and especially safety regulations are necessary - Following existing safety regulations it is appropriate for outdoor heat pumps
12 R290 AS A REFRIGERANT FOR ALL HP Is R290 a refrigerant for all heat pumps? - For indoor applications additional safety devices are mandatory like a gas alarm device and ventilation Due to additional installation costs (~ ) many customers would abandon from such a solution and decide for a heat pump with HFC or other technology (e.g. gas boiler) In that case incentives for the end customer are necessary
13 APPLICATION EXAMPLES Heat Pump running at A-24/W60 without additional electrical heater Flow temperature Outside temperature
14 CONCLUSION R290 is a good refrigerant for outdoor Air/Water-heat pumps Advantages are the high temperatures at low ambient temperatures R 290 can be handled in a mass production with less additional effort compared to HFC s Due to it s low GWP and to reduce CO2-emission R290 is a proper refrigerant for environment friendly heat pumps It is not a refrigerant for all heat pump, especially for indoor applications because of additional safety installation costs If possible we want to extend our product portfolio (availability of components, compliance with international safety regulations)
15 Thank you very much!.
16 APPLICATION EXAMPLES Flow temperature Outside temperature Typical winter day Tamb = -3 C to -10 C
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