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  4. Hot water heater Latent heat recovery water heater UltraGas2 series (Hirakawa Co., Ltd.)
Hot water heater Latent heat recovery water heater UltraGas2 series-UG2-150 WH type
Hot water heater Latent heat recovery water heater UltraGas2 series-Hirakawa Co., Ltd.

Hot water heater Latent heat recovery water heater UltraGas2 series
Hirakawa Co., Ltd.

Hirakawa Co., Ltd.'s Response Status

Response Rate

100.0%

Response Time

50.0hours

About This Product

Released on March 31, 2024. In the spring of 2024, it will be renewed as the UltraGas2 series, which saves space by improving the performance of heat transfer tubes. This is an ultra-high-efficiency water heater with a thermal efficiency of 105% that uses the condensation heat of H2O contained in combustion gas. By updating conventional hot water heaters to UltraGas2, it is possible to reduce fuel consumption and CO2 emissions by more than 15%. Compatible with hydrogen mixed fuel as an option. The UG hot water total system achieves energy savings of nearly 20% by centrally controlling devices using UltraGas2. This system has received high praise, including receiving the Japan Machinery Federation Chairman's Award in 2021 and being selected for the Kansai Manufacturing New Selection 2,021 by the Kinki Bureau of Economy, Trade and Industry.

■Achieve energy savings with ultra-high efficiency

By recovering and using latent heat (heat of condensation of H2O contained in combustion gas), thermal efficiency of 105% (for city gas 13A) is achieved (103% for LPG specifications) based on lower calorific values.

■Latent heat recovery method for water heater body

In the conventional method of recovering latent heat by attaching a latent heat recovery device externally to the water heater, the stainless steel latent heat recovery device corrodes due to the acidity of the condensed water and requires periodic replacement.However, UltraGas2 recovers latent heat through the water heater itself, and the condensed water is collected in a resin tray at the bottom of the water heater, so there is no need to worry about corrosion, and maintenance costs after the water heater is installed are significantly reduced.

■Latent heat recovery throughout the load area

The structure is such that a burner is placed at the top of the water heater, and combustion gas is sent downward.The hot water return ports to the water heater are arranged in two stages, upper and lower, and a lower temperature area is provided at the bottom of the canned water, creating a vertical temperature distribution. This allows efficient heat transfer from the combustion gas to the canned water. If the water heater has two circuits: hot water supply and heating, the external latent heat recovery method recovers latent heat only during the hot water supply load, so it is possible to recover latent heat when the hot water supply load is very small, which would be difficult with this method. Also, unlike external latent heat recovery systems, it has heating capacity equivalent to hot water supply capacity.

■Suitable for a wide range of capacities

We have a total of 8 models with barrel outputs from 149kW to 1,542kW (hydrogen mixed combustion), and we have a rich lineup to meet the various needs of our customers. We support small to large facilities such as hospitals, welfare facilities, hotels/inns, hot spring facilities, fitness facilities, commercial buildings, and greenhouse gardening.

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    Hot water heater Latent heat recovery water heater UltraGas2 series

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1 Models of Hot water heater Latent heat recovery water heater UltraGas2 series

Image Part Number Price (excluding tax) CO2 reduction amount (t-CO2/year) Dry weight (kg) Heat transfer area (m2) Control method Pressure loss (kPa) as above Safety equipment Rated output (kW) Maximum flow rate (t/h) Maximum working head pressure (MPa) Hot water connection diameter Thermal efficiency (%) Fuel Fuel connection diameter (JIS 10K FF) Fuel consumption (m3N/h) Boiler output (kW) Design flow rate (t/h) Design temperature (inlet/outlet) (℃) Operating weight (kg) Power capacity
Hot water heater Latent heat recovery water heater UltraGas2 series-Part Number-UG2-150 WH type

UG2-150 WH type

Available upon quote

13.4

830

3

Proportional control

Heating: 35
Hot water supply: 20, 25

Dry firing prevention low water level switch
Heat transfer water temperature sensor
exhaust gas temperature sensor

Heating: 138
Hot water supply: 149 (13A), 146 (LPG)

Heating: 11.8
Hot water supply: 2.6 (13A), 2.5 (LPG)

Heating: 0.98
Hot water supply: 0.98

Heating: 50A
Hot water supply: 25A

13A: 105
LPG: 103

13A
LPG

25A

13A: 12.6
LPG: 5.7

13A: 149
LPG: 146

Heating: 11.8
Hot water supply: 2.3

Heating: 60/70
Hot water supply: 5/60

1,150

Voltage (50/60Hz): AC200V three-phase
Required power (kW): 2.2

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About Company Handling This Product

Hirakawa Co., Ltd.

Response Rate

100.0%

Response Time

50.0hrs

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