Mitsubishi Electric Zubadan heat pump PUHZ-HRP71 Air/water

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Morris Stafford
5 years ago
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Standard HP Standard inverter fixed speed heat pump

Air-Source heat pumps Performance characteristics Heat pump F.

Low energy house case study with heat pump E-value: 34 / K-value: 29 Useful surface: 216m² - heated surface 160m² Inhabitants 5 2 adults 3 children Electrical consumption: 2012:

7 Low energy house case study with heat pump E-value: 34 / K-value: 29 Useful surface: 216m² - heated surface 160m² Inhabitants 5 2 adults 3 children Electrical consumption: 2012: kWh(el) 2013: 4643,7kWh(el)* *excl. electrical vehicle test No natural gas connection Frederiek Demeyer COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 9

Low energy house case study with heat pump 24/7 space heating at 20 C during heating season Very low temperature heating 30,2 C/25,2 C @ -10 C/10,1 C outside temperature radiation heating ground

8 Low energy house case study with heat pump 24/7 space heating at 20 C during heating season Very low temperature heating 30,2 C/25,2 -10 C/10,1 C outside temperature radiation heating ground floor Oversized radiators 1st floor Delta T over primary circuit (condensor: 5 C, strictly maintained) Switch off temperature heating: 10,1 C outside Sanitary hot water temperature: 55 C Frederiek Demeyer COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 10

output even at extreme low outside temperature conditions 100% nominal thermal power (8kw) until -15 C 75% nominal thermal power (6kW) until -25 C

9 The Mitsubishi heat pump Specifications of the integrated heat pump Mitsubishi Zubadan PUHZ-HRP71 Nominal thermal output: 8kW COP A7/35: 4.4 High temperature heat pump Works in the Super heated region of the cooling liquid => water temperatures up to 65 C are possible Nominal thermal output even at extreme low outside temperature conditions 100% nominal thermal power (8kw) until -15 C 75% nominal thermal power (6kW) until -25 C Extreme low temperatures pumps are no longer typified by a balance point Frederiek Demeyer COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 11

13 Thermal production space heating 7572 kwh 8555 kwh Thermal production sanitary hot water 964 kwh 1127 kwh Total electricity 2594 kwh(el) 2768 kwh(el) SPF EN ,29 3,50 HDD[10/20]*heating degree days 2012: 2,98kWh/HDD 2013: 3,09kWh/HDD SPF EN15450 (weighted COP under real circumstances) including the consumption of the primary water circulator Frederiek Demeyer COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 15

14 The values presented above are based on daily production figures; they include building as sanitary hot water production. Frederiek Demeyer COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 16

16 Next step 08/2014: Test of the new Zubadan 3 generation Third generation Zubadan optimisations New Compressor Heating capacity at very low ambient has been increased significantly deg. C). Nominal heating capacity can be kept even at A-15 deg. C. Low Compression Area Reduce Excessive Compression Loss (SCOP+1%) HEX with more paths COP/SCOP Increase Optimized de-icing cycle COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 18

logic (Same as Packaged models) (SCOP+2%) AC power heating for COMP Stand-by power

17 Next step 08/2014: Test of the new Zubadan 3 generation Third generation Zubadan optimisations New Control FAN control improvement (SCOP+2%) Fine tuning of Control logic (Same as Packaged models) (SCOP+2%) AC power heating for COMP Stand-by power reduction Motor for low sound COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 19

18 Conclusions after a two year field test of the PUHZ-HRP71 (Zubadan 2) SPF EN15450: SPF EN15450: 3.5 Extreme high results considering a pump switch off temperature of 10,1 C outside Two actions were undertaken to increase the SPF in 2013: Delay of the Flash Injection set point: 3 C 0 C (minor impact) Advanced Compressor Power Control (major impact) Frederiek Demeyer COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 20

Conclusions after a two year field test of the PUHZ-HRP71 (Zubadan 2) 2012 - SPF EN15450: 3.3 2013 SPF EN15450: 3.

19 Conclusions after a two year field test of the PUHZ-HRP71 (Zubadan 2) SPF EN15450: SPF EN15450: 3.5 No overdimensioning of the heat pump as a consequence of the Zubadan technology Ease of control at higher outside air temperatures Limited electrical impact on the grid connection no comfort worries at extreme low outside air temperatures Frederiek Demeyer COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 21

20 Conclusions after a two year field test of the PUHZ-HRP71 SPF EN15450: 3.5 > 2.5 => primary energy saving! No need for a hybrid heat pump (cop electrical resistor = 1) In combination with renewable energy => zero CO2 emissions Air source/water heat pump is an interesting solution to enjoy a great thermal comfort at a low investment as yearly energy expenses. Frederiek Demeyer COPYRIGHT 2013 MITSUBISHI ELECTRIC CORPORATION. ALL RIGHTS RESERVED. 22