It is always very cold in Europe and America, CO2 heat pumps work very stable under -25℃,please reference COP performance and technical datas last email. Stable Outlet of 90℃, which is R410 cannot achive

Dorin Compressor, Wilo pump, special heat exchanger, all spares are high quality

CO2 heat pump is very friendly to environment, contributes to global policy of "carbon neutral carbon peak"

CO2 is Non-fammable, non-toxic, Natural Product, ODP(Ozone Threat Potential Value)=0, GWP(Greenhouse Effect Potential Value)=1 While the R410 is 2088

high temperature heat pumps are capable of being used with existing high temperature distribution systems (e.g. existing radiators), and therefore could provide a viable alternative to boilers in the retrofit market.

CO2 is widely recognised an attractive and competitive alternative refrigerant to the synthetic fluids in heat pump applications

Carbon dioxide high temperature heat pump
Carbon dioxide is a natural working fluid, with high thermal conductivity and specific heat capacity, which helps to obtain high heat transfer coefficient; low dynamic viscosity can reduce the pressure drop of working fluid in the tube. The high vapor density helps to improve the mass flow rate of the working fluid, the density ratio (the density ratio represents the difference between the properties of the gas and the liquid) is small, which is beneficial to the distribution of the working fluid, and the surface tension is small, which can improve the boiling in the evaporator heat transfer intensity of the zone. The gas density is high, and the heating capacity per unit volume is large, which is about 5 times that of R22, which can reduce the size of pipes and compressors, making the system lighter, compact and small in size. The pressure ratio of the compressor (the ratio of the condensing pressure and the evaporating pressure of the working fluid) is low, the compression process can be closer to isentropic compression and the efficiency is improved. Wide range of sources and low prices.
The process of carbon dioxide transcritical refrigeration cycle is slightly different from that of ordinary vapor compression refrigeration cycle. The suction pressure of the compressor is lower than the critical pressure, and the evaporation temperature is also lower than the critical temperature. The endothermic process of the cycle is still carried out under subcritical conditions. The heat exchange process relies on latent heat to complete. However, the exhaust pressure of the compressor is above the critical pressure, and no condensate is produced during the heat release process of the working medium. The high-pressure heat exchanger is no longer called a condenser, but a gas cooler. The traditional concept of condensation temperature has been lost. Meaning, the heat exchange process relies on sensible heat to complete.

Performance of 8 kw R744 CO2 Heat Pump Water heater residential usage -25 degree stable

Ultra-low temperature working conditions: ambient temperature DB-10-C, water inlet temperature 9°C;
Defrost condition: ambient temperature DB2°C/WB1°C, water inlet temperature 9°C; low temperature condition: ambient temperature DB7°C/WB6°C, water inlet temperature 9°C; standard working condition: ambient temperature DB20°C /WB15°C, inlet water temperature 15°C; high temperature working condition: ambient temperature DB38°C/WB23°C, inlet water temperature 29°C.
Installation Notes:
1. The spacing around the installation must not be less than Im;
2. The pipelines other than the heat pump should be protected from frost and heating elements can be installed;
3. Heat insulation and protection measures should be taken for the pipelines for hot water circulation to prevent heat loss.

HP	A/mm	B/mm	C/mm
7.5	1450	950	1450
10	1600	950	1500
15	1850	1150	1900
20	2050	1150	1950
30	2670	1410	2150
40	2290	2270	1980

Application Diagram Pressure-bearing water tank

8 kw R744 CO2 Heat Pump Water heater residential usage -25 degree stable

System Diagram Smart Control System

8 kw R744 CO2 Heat Pump Water heater residential usage -25 degree stable

CO2 heat pump hot water unit specification list 8 kw R744 CO2 Heat Pump Water heater residential usage -25 degree stable
Model		SJKRS-05I/C	SJKRS-28II/C	SJKRS-36II/C	SJKRS-55II/C	SJKRS-73II/C	SJKRS-106II/C	SJKRS-160II/C
Specification		2HP	7.5HP	10HP	15HP	20HP	30HP	45HP
Power supply		230V/1N/50Hz	380V/3N/50Hz
Heating Method		Direct heating / circulating
Nominal working condition	( kw)heating capacity	7.45	28.1	37.7	56.1	74.1	108.6	158.7
	( kw) Input power	1.61	6.1	8.2	12.2	16.1	23.6	34.5
	COP	4.6	4.6	4.6	4.6	4.6	4.6	4.6
	( m³/h) Heating water flow	0.11	0.6	0.81	1.21	1.62	2.33	3.41
High temperature working conditions	(kw)heating capacity	5.58	23.9	28.5	51.5	59.5	89	131.5
	( kw)Input power	1.73	7.5	8.9	16.1	18.6	27.8	41.1
	COP	3.2	3.2	3.2	3.2	3.2	3.2	3.2
	( m³/h) Heating water flow	0.07	0.27	0.33	0.59	0.68	1.02	1.51
Low temperature working conditions	(kw)heating capacity	4.3	15.7	19.1	31.8	38.9	59.3	90
	( kw)Input power	1.59	5.8	7.1	11.8	14.4	21.9	33.3
	COP	2.7	2.7	2.7	2.7	2.7	2.7	2.7
	(m³/h) Heating water flow	0.07	0.28	0.34	0.56	0.68	1.04	1.52
Parts information	Water pipe interface size	DN15	DN20		DN25		DN32
	Water heat exchanger	Plate or tube heat exchanger
	Air heat exchanger	Copper tube aluminum fins
	Compressor type	Double rotary	Semi-closed reciprocating type
	Operation panel	Color touch screen
Maximum outlet temperature		85℃	90℃
Refrigerant		R744(CO2)
Design pressur(MPa)		15MPa(HP)/8MPa(LP)
Dimensions (L,W,H mm)		7503901245	14509501450	16009501500	185011501900	205011501950	267014102150	2070x2150x2245
( dB) Noise		≤44	≤56	≤59	≤62	≤67	≤70	≤70
( kg) Weight		83	550	660	780	860	1180	1360
Feedwatertemperature(℃)		5~40
( Feed water pressure MPa)		0.05~0.4
Water Outlet temperature (℃)		55~85	55~90
Maximum flow		0.24	1.2	1.5	2.4	3.2	4.9	6.5
Ambient temperature (℃)		-25~43

System schematic diagram

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