High Efficiency CO2 R744 heat pump water heater for hotels
As one of China's earliest professional manufacturers of purification air conditioners and HVAC equipment, Sujing specializes in R&D, production, sales, and installation. We operate two core segments: air conditioning systems and heat pump systems. The heat pump line includes CO2 heat pumps, cascade variable frequency units, air source (chilled water) units, water-cooled chillers, industrial screw units, air-cooled modules, and drying units.
Our products are widely applied in industry, agriculture, commerce, transportation, and aerospace, as well as in specialized fields like green heating, coal mines, oil fields, livestock farming, agricultural drying, and biomedicine. They are exported to over 30 countries, including the U.S., Finland, the Netherlands, Canada, and Brazil.
The compressor absorbs low-temperature and low-pressure gaseous carbon dioxide refrigerantfrom the evaporator,and then compresses it into a high-temperature and high-pressuresupercritical fluid. This fluid enters the gas cooler to exchange heat with water, where it is cooledinto a high-pressure fluid and releases a large amount of heat. The water absorbs the releasecheat and the temperature continues to rise, After the high-pressure fluid is throttled andreduced in pressure by the expansion valve, it absorbs the heat in the surrounding air andevaporates into a low-pressure gas through the action of the fan in the evaporator, and is thensucked into the compressor for compression. This cycle is repeated to produce hot water.
Excellent high-temperature heating performance: the highest water output can reach more than 90°C.
Excellent low-temperature performance: high-temperature hot water can still be produced at an ambient temperature of -30°C.
First-level energy efficiency: high efficiency, standard COP not less than 4.6.
Wide application range: can work normally in an ambient temperature of -30°C~43°c, suitablefor producing domestic orindustrial hot water.
| Model |
SJKRS-28 II/C |
| Specifcations |
7.5 HP |
| Power supply |
380V/3P/50Hz |
| Heating mode |
Direct heating/ Circulation |
| Starndard working conditions |
Heating capacity |
28.1 Kw |
| input power |
6.1 |
| COP |
4.6 |
| Hot water flow |
0.6 |
| High temperature working condition |
Heating capacity |
23.9 Kw |
| input power |
7.5 |
| COP |
3.2 |
| Hot water flow |
0.27 |
| Low ambient temperature |
Heating capacity |
15.7 Kw |
| input power |
5.8 |
| COP |
2.7 |
| Hot water flow |
0.28 |
| Component |
Water pipe connection |
DN20 |
| Water heat exchanger |
Plate / Shell and tube heat exchanger |
| Air heat exchanger |
Coppertube aluminum fin |
| Compressor type |
Semi-closed reciprocating |
| Operation panel |
Color touch screen |
| Max, wateroutlet temperature |
90ºC |
| Refrigerant |
R744(CO2) |
| Design pressure |
15MPa(HP)/8MPa(LP) |
| Dimensions(length * width * height) mm |
1450*950*1450 |
| Noise |
≤56 |
| Weight |
550 |
| Application |
Water supply temperature |
5~40ºC |
| Water supply pressure |
0.05~0.4 |
| Water outlet temperature |
55~90ºC |
| Max. flow rate |
1.2 m3/h |
| Ambienttemperature |
'- 30~43ºC |
Remarks:
1) Standard working condition: ambient temperature DB 20°c/WB 15°c, initial water temperature on the user side 15°c, and final water temperature 55°C;
2) High-temperature water outlet working condition: ambient temperature DB 20°c/wB15°c, initial water temperature on theuser side 15°C, and final water temperature 90°C.
3) Low-temperature working condition: ambient temperature DB-12°c/wB-14°C, initial water temperature on the user side 9°C and final water temperature 55°C
View more products,you can click product keywords...
Jiangsu Sujing Group Co., Ltd
Dedicated to overall solutions for equipment manufacturing in the field of dehumidification and environmental protection.
History: Established in 1969, state-owned high-tech company
Size: 130,000 square meters
Employees: 1200+
Rotary Dehumidifier Testing Center
Equipped with advanced sensors, our testing center continuously monitors key operating parameters to accurately assess the dehumidifier's performance and operating status. Real-time test data can be accessed anytime via mobile devices, offering valuable insights for fault diagnosis and condition evaluation-driving smarter maintenance and continuous product optimization.
Chiller Performance Testing Center
The testing center is equipped to evaluate both water chillers and water/ground source heat pumps, simulating year-round operating conditions. It supports single-unit testing up to 1200 kW, ensuring reliable performance validation under real-world scenarios.
100HP Environmental Simulation Laboratory
This state-of-the-art laboratory is equipped to test chillers & heaters, direct expansion units, combined air conditioning units, and fan coil units-with dedicated capabilities for explosion-proof equipment. It can simulate year-round operating conditions and supports single-unit testing up to 300 kW, ensuring comprehensive and reliable performance validation.
Environmental Simulation Enthalpy Difference Laboratory
This laboratory can simulate extreme environments with temperatures ranging from -30°C to 50°C. It tests dehumidifier performance under various climate conditions, while real-time monitoring of operating parameters is conducted through a central control room. This ensures a solid foundation for the stable and reliable operation of dehumidifiers.
1.Who are we?
Established in 1970 as a state-owned enterprise, Jiangsu Sujing Group Co., Ltd. is a National Innovation Pilot Enterprise and National Key High-Tech Enterprise dedicated to advancing technological innovation, intelligent equipment manufacturing, and energy-saving integrated solutions in the clean environmental protection sector. With a steadfast commitment to sustainable development, we drive high-quality growth through cutting-edge technologies and industry leadership.
2.How can we guarantee quality?
A: Always a pre-production sample before mass production; Always final Inspection before shipment.
3.Q3. What can you buy from us?
A: Dehumidifiers,Chillers & AC Terminal,Heat Pump
4.Q4. Why should you buy from us not from other suppliers?
A:Innovation Ecosystem: Built a multidimensional R&D platform-"Institute + Research Station + Engineering Center", achieving breakthroughs in green technology R&D, patent applications, and industry standards.
Cutting-Edge Manufacturing: Specialize in heat pumps, industrial air conditioners, dehumidifiers, chillers, fan coil units, and customized HVAC solutions.
Global Impact: Products serve new-generation IT, renewable energy, electronics, and commercial/industrial sectors.
5.Q5. What services can we provide?
A: Accepted Delivery Terms: FOB,,CIF,EXW;
Accepted Payment Currency: USD, EUR,CNY;
Accepted Payment Type: T/T,L/C
Language Spoken: English, Chinese;
Audited Supplier 
){kind=link}