CO2 Heat pump water heater for commercial use EcoCute EcoCute 1. Product Outline 2. Case study: Actual operational status and actual cost-saving result 3. Various example 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved.
Natural Refrigerant CO² Air to Water System Ultra Efficient Technologies from MHI Mitsubishi Heavy Industries introduce 30kW Heat Pump Water Heater MHI s NEW Q-Ton The World s FIRST 2-Stage CO² Compressor Provides Hot Water up to 90 COP of up to 4.3 [430% efficiency!] Operation down to -25 Ambient Using NATURAL REFRIGERANT 1
Development concept and Advantage Performance issue to be solved on conventional air to water heat pump Point 1 When operating under low outdoor temperature, heating capacity and heating efficiency decrease significantly. MHI solution The world's first CO² two-stage compressor (Scroll + Rotary) is adopted. Point 2 Point 3 Point 4 The rated heating capacity is 30kW and sustainable at ambient air temperature as low as -7 The COP on rated conditions reaches 4.3, which is the highest level in the industry A 90 hot water supply is available even at ambient air temperature as low as -25 2
Field Test installation site A certain pharmaceutical company System composition Q-ton 1unit, Unvented cylinder 500l x 4units Kitchen and bathroom 3
Field Test1; Actual operation state 1. Operation Condition This operation data 2012/1/25~26 Ambient temp. -7 line AMBIENT TEMP. -7 line Ambient temp, Feed water temp as bellows AMBIENT TEMP. Average -8.0 Lowest -13.9 Highest 5.7 FEED WATER TEMP. Average 18.1 Lowest 9.6 Highest (59.8) Feed-water temperature rise when hot-water storage tank is about to be filled up Setting Hot water temp 80 No problem in operating Hot-water temp. Integral heat capacity and power consumption.(kwh) Hot-water temp.:80 Hot-water tank is filled up FEED-WATER TEMP. Heating Capacity:28.5 ~ 30kW! HOT-WATER TEMP. Integral heat capacity Integral heat load Integral power consumption Heat capacity 30kW line 28.5kW line Heat Capacity(Kw) TIME 4
Field Test2; Actual Supplying 90 hot water 95.0 Setting at 90 出 Hot 湯 water 温度 temp ( ) 90.0 85.0 80.0-20.0-15.0-10.0-5.0 0.0 外気温 Outdoor ( ) temp 5
Cost-saving result 1 Daily results in February Ambient temp ( ) 気温 ( ) Outdoor temp(feb) 15 10 5 0-5 -10-15 -20 [Calculation conditions] CO² emission 最高 Max 平均 Ave 最低 Min On 7/Feb, Snow fall On 24/Feb, Snow fall 1 6 11 16 21 26 31 Date The running cost is reduced to 50% in comparison with kerosene boiler CO² emission volume is reduced to 46% in comparison with kerosene boiler 日 HP unit kerosene boiler 2.49kg-CO2/L ランニングコスト [ 円 ] Running cost (J Yen) Running cost(in Feb) \4,500 \4,000 \3,500 \3,000 \2,500 \2,000 \1,500 \1,000 \500 120 100 \0 80 60 40 20 2/1 2/3 2/5 2/7 エコキュート HP unit Boiler ボイラー ( 換算値 ) The difference in running cost between boiler and HP unit is clear even on the day with heavy snow Saturday & Sunday 2/9 2/11 2/13 2/15 2/17 2/19 2/21 2/23 2/25 2/27 Boiler efficiency 0.8 0 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15 2/17 2/19 2/21 2/23 2/25 2/27 CO² emission CO2 排出量 [kg-co2] (kg- CO²) CO² emission (in Feb) エコキュート HP unit Boiler ボイラー ( 換算値 ) 6
Cost-saving result 2 Annual COP in this site 7
Cost-saving result 3 Annual results summary Running cost -61% CO² emission amount -29% [Calculation conditions] Price rate Q-ton/electric rate The summer :\11.65/kWh, The other season: \10.70/kWh Boiler/kerosine : 90/L CO² emission amount Q-ton/electric : 0.546kg-CO2/kWh Boiler/kerosine : 2.490kg-CO2/L 8
Energy cost was reduced to 43-54% in comparison with the conventional boiler in the winter season when operation conditions were the severest for heat pump unit. And there was no trouble. (at the lowest temperature:-20 ) In the intermediate season and summer season when heat pump performance improves, it can be presumable that energy cost may be reduced further. Toyama Iwate エネルギー費用割合 Energy cost (%) (%) I Toyama 富山 (Jan/2011 (H23 年 1 月 ~H23 to Feb/2011) 年 2 月 ) 100 80 60 40 20 0 100 Existing 従来ボイラ boiler Hokkaido 54 Heat キュートン pump unit Supplying hot water for kitchen and hand-wash 30kW x 1set + unvented cylinder Installation site: Hokkaido area severely cold area (-20 or lower) In Hokkaido 北海道 (Dec/2010 (H22 年 to 12 Jan/2011) 月 ~H23 年 1 月 ) エネルギー費用割合 Energy cost (%) (%) 100 80 60 40 20 0 100 Existing 従来ボイラ boiler Supplying hot water for kitchen and bath 30kW x 1set + unvented cylinder Installation site: North Iwate area severely cold area in Tohoku 50 Heat キュートン pump unit Hw outlet temp( ) 出湯温度 ( ) 95.0 90.0 85.0 80.0-20.0-15.0-10.0-5.0 0.0 Outdoor 外気温 air temp ( ) ( ) In Iwate (Jan/2011 to Mar/2011) エネルギー費用割合 Energy cost (%) (%) 100 80 60 40 20 岩手 (H23 年 1 月 ~H23 年 3 月 ) 100 Preheating feed water to the boiler 30kW x 1set + heat exchanger Installation site: Toyama area Low temp and high humidity area 0 Existing 従来ボイラ boiler 43 Heat キュートン pump unit 9
Installation Sample 1 (Hybrid system with boiler) The hybrid system combined with a boiler takes advantage of good sides of 2 system. Japanese hot spring inn in Matsumoto and Kanazawa System composition Q-ton 1unit, Unvented cylinder 500l x 2units Bathroom, shower, faucet Utilizing existing tank and boiler. 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved. 10
Installation Sample 2 (School lunch center) This site is the largest all-electric school lunch center in Japan. System composition Q-ton 12 units, Large open tank hot water supply for dishwashers 11
Installation Sample 3 (warm-bathing facility) System composition Q-ton 12 units, Large open tank preheating water supply for boiler 12
Installation Sample 4 (Food factory) System composition Q-ton 4 units, Open tank 4,000L, 15,000L Cleaning in the factory, food manufacturing process use 13
Installation Sample 5 (Office block - UFH) System composition Q-ton 3 units, Closed tank 1,000L Central heating system via under floor heating circuit 14
Installation Sample 6 (Medical Centre New build) System composition Q-ton 1 unit, Closed tank 1,000L DHW supply to 20 treatment and examination rooms including the reheat of the secondary circuit 15
Installation Sample 7 (Hotel Hybrid system) System composition Q-ton 1 unit, Closed tank 2 No 1,000L DHW supply to 56 rooms using the existing boiler to reheat the distribution circuit 16
Installation Sample 8 (Hotel - Retrofit) System composition Q-ton 2 units, Closed tank 2 No 1,000L DHW supplies to 250 people using the existing boilers to deliver central heating 17
Installation Sample 9 (Student Accommodation) System composition Q-ton 1unit, Closed tank 1 No 1,000L DHW supply for up to 48 students using 6 Kw immersion element to cover re-circulation demand 18
Installation Sample 10 (4* Hotel Retrofit installation) System composition Q-ton 2unit, Closed tank 2 No 3,000L + 5 No 4,000L tank DHW is provided to 200 rooms and the existing boiler is kept for back up 19
SUMMARY The rated heating capacity of 30kW is sustainable at ambient air temperature as low as -7 In the field-test, the Q-ton operational cost was really lowered by almost half. Q-ton came to be used in the various fields Thank you for your kind attention 2014 MITSUBISHI HEAVY INDUSTRIES, LTD. All Rights Reserved.