Økodesign Chiller med naturlige kuldemedier

Transcription

1 Økodesign Chiller med naturlige kuldemedier Armin Hafner Kveldsmøte

2 Introduction European Directive 2009/125/EC: since2018 chillers with a rated cooling capacity not exceeding 2 MW must fulfill a series of ecodesign requirements to be placed on the market and/or put into service Carbon dioxide (R744) is the an environmentally-friendly refrigerant classified as A1 R744 is, at least initially, not the first choice for air conditioning or chiller units due to its special thermo-physical properties 2

3 Aim of the work This work aims at experimentally proving that R744 chillers can satisfy the ecodesign requirements by recovering part of the available expansion work with the aid of two-phase ejectors. 3

4 Regulation 2016/2281 This is the most important executive regulation related to the Ecodesign Directive for comfort chillers Minimum required seasonal space cooling energy efficiency 4 Comfort chiller tier 1 tier η s,c [%] η s,c [%] Air to water chillers cooling capacity < 400 kw cooling capacity 400 kw Water/brine to water chillers Cooling capacity < 400 kw kw cooling capacity < 1.5 MW cooling capacity 1.5 MW

5 5 Comfort chiller Air-to-water and water/brine-to-water comfort chillers Rating points for the calculation of the seasonal space cooling energy efficiency (η s,c ) Air to water Water/brine to water Rating Point Part Load Ratio Outdoor side heat exchanger Inlet temp. [ C] Outlet temp. [ C] Indoor side heat exchanger Inlet temp. [ C] Outlet temp. [ C] A 100% B 74% C 47% D 21% A 100% B 74% C 47% D 21%

6 Air-to-water and water/brine-to-water comfort chillers(2) European cooling season for comfort chillers and air conditioner 6 Point T amb [ C] t annum [h] EER calculation η load [%] Point T amb [ C] t annum [h] EER calculation EER (D) Linear interpolation EER (D) B measured value EER (D) Linear interpolation D measured value Linear interpolation Linear interpolation Linear interpolation Linear interpolation Linear interpolation Linear interpolation A measured value Linear interpolation EER (A) C measured value EER (A) Linear interpolation EER (A) Linear interpolation EER (A) Linear interpolation EER (A) 100 η load [%]

7 Experimental setup 7 Super Smart Facility, sponsored by Advansor

8 Experimental setup: Active (used) parts Two inverter controlled compressors GC 1 (glycol cooled) and GC 2 (water cooled) are used, while GC 3 is bypassed EJ AC indicates a multi-ejector block designed for high entrainment ratio and low pressure lift EVAP AC,1 indicates a plate heat exchanger evaporator whose heat load is provided by an auxiliary glycol loop 8

9 Test procedure Test conditions -> set-points 9 Comfort chiller Air towater Water/ brine to water Rating Point Part Load Ratio Condensat ion temp. [ C] Outdoor side heat exchanger High pressure [bar abs ] Gas cooler outlet temp. [ C] Indoor side heat exchanger Evaporation temp. [ C] A 100% over B 74% over C 47% D 21% A 100% over B 74% C 47% D 21%

10 Test results Conditions as measured 10 Comfort chiller Air towater Water/br ineto water Rating Point Part Load Ratio Condens ation temp. [ C] Outdoor side heat exchanger High pressure [bar abs ] Gas cooler outlet temp. [ C] Indoor side heat exchanger Evaporation temp. [ C] A 100% B 74% C 47% D 21% A 100% B 74% C 47% D 21%

11 Results Comfort chiller Air towater Water/bri neto water Rating Point Part Load Ratio Cooling capacity [kw] Power consumpti on [kw] EER [ ] T in,gl [ C] T out,gl [ C] A 100% B 74% C 47% D 21% A 100% B 74% C 47% D 21%

12 Results(2) Most of the test conditions are very close to the required one The resulting glycol inlet and outlet temperatures are not even close to the required conditions: This is due to the fact that the used plate heat exchanger is not designed to handle the required load at these temperature differences (the focus of study is to achieve the required cooling capacity) 12

13 Results(3): Air-to-water chillers 200 Seasonal space cooling energy efficiency of cooling products [%] Minimum value from 1 January 2018 Minimum value from 1 January 2021 Obtained value

14 14 Results(4): Air-to-water chillers 25,0 20,0 15,0 10,0 5,0 0,0 +21,7% +12,7% Percentage above minimum Seasonal space cooling energy efficiency of cooling products [%] Minimum value from 1 January 2018 Minimum value from 1 January 2021

15 Results(5): Water/brine to water chillers 225 Seasonal space cooling energy efficiency of cooling products [%] Minimum value from 1 January 2018 Minimum value from 1 January 2021 Obtained value

16 16 Results(6): Water/brine to water chillers 10,0 9,0 8,0 7,0 6,0 5,0 4,0 3,0 2,0 1,0 0,0 +3,7% +1,6% Percentage above minimum Seasonal space cooling energy efficiency of cooling products [%] Minimum value from 1 January 2018 Minimum value from 1 January 2021

17 Sammendrag Det er mulig å produsere CO 2 chillere som oppfyller økodesign kravene også etter

18 Other supplier delivering units with natural working fluids

19 19 Eksempler fra Frigo Plus

20 20 Unit #1

21 21

22 22 Unit #2

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24 24 Unit #3

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26 26 Eksempler fra Frigo Plus

27 Ecodesing Directive 2009/125/EC plus.hr v.1

28 28 Ecodesign directive what is it? Framework for the setting of ecodesign requirements for energy-related products For chillers ecodesign directive is implemented through 2 main Commission regulation: 1. Commission Regularion (EU) 2015/ implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for professional refrigerated storage cabinets, blast cabinets, condensing units and process chillers 2. Commision Regulation (EU) 2016/ implementing Directive 2009/125/EC of the European Parliament and of the Council establishing a framework for the setting of ecodesign requirements for energy-related products, with regard to ecodesign requirements for air heating products, cooling products, high temperature process chillers and fan coil units

29 29 Energy-related products Process chiller Comfort chiller SEPR (*) SEER (**) (EU) 2015/1095 LT regime -25 C MT regime -8 C (EU) 2016/2281 HT regime +7 C (EU) 2016/2281 HT regime +7 C (*) SEPR - seasonal energy performance ratio (**) SEER - seasonal energy efficiency ratio

30 30 COMFORT CHILLER - SEER First tier minimum seasonal space cooling energy efficiency of comfort chillers, expressed in % (From 1 January 2018) Unit type AW chiller WW chiller Rated cooling capacity, [kw] Min. η s,c (SEER) < < and <

31 31 COMFORT CHILLER - SEER Second tier minimum seasonal space cooling energy efficiency of comfort chillers, expressed in % (From 1 January 2021) Unit type AW chiller WW chiller Rated cooling capacity, [kw] Min. η s,c (SEER) < < and <

32 32 HIGH TEMPERATURE PROCESS CHILLER - SEPR First tier seasonal energy performance ratio of high temperature process chillers (From 1 January 2018) Unit type AW chiller WW chiller Rated cooling capacity, [kw] Min. SEPR value < 400 4, ,0 < 400 6,5 400 and < , ,0

33 33 HIGH TEMPERATURE PROCESS CHILLER - SEPR Second tier seasonal energy performance ratio of high temperature process chillers (From 1 January 2021) Unit type AW chiller WW chiller Rated cooling capacity, [kw] Min. SEPR value < 400 5, ,5 < 400 7,0 400 and < , ,5

34 34 PROCESS CHILLER - SEPR Second tier seasonal energy performance ratio of process chillers (From 1 July 2018) Unit type AW chiller WW chiller Operating temperature Medium Low Medium Low Rated cooling capacity, [kw] Min. SEPR value 300 2,58 > 300 3, ,70 > 200 1, ,29 > 300 4, ,09 > 200 2,42

35 35 Frigo Plus Calculator Frigo Plus Calculator Interactive chiller selection tool Chiller configuration Selection of the components Calculation of technical data Lower dt on condenser + Lower dt on evaporator + More capacity steps = Higher efficiency and SEPR and SEER values Automatic calculation of SEPR and SEER value

36 36 min krav fra 2021: >161 Outputs:

37 37 Thank you for your attention! plus.hr

38 38 ENRAD fra Sverige

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40 Takk for oppmerksomheten! Armin Hafner