CO2 Heat Pump Hot Water
A new domestic and commercial heating system that uses carbon dioxide (R744) to operate can provide hot water up to 90°C, helping homes and businesses increase the efficiency of hot water production while significantly reducing their carbon footprint.
Advantages of CO2 Heat Pump Hot Water system:
1. Save energy
2. 5 times higher efficiency than traditional electric water heaters
3. Allow the use of off-peak electricity
4. The first hour rating is higher than all heat pump water heaters
5. Faster recovery after taking hot water
6. The production of hot water is as low as -20°F and below
7. Provide hot water temperature up to 175°F
The working principle of CO2 Heat Pump Hot Water system:
The CO2 heat pump water heater is a two-part system consisting of a water tank (usually placed indoors) and a heat pump unit (usually placed outdoors, up to 66 feet from the water tank). The working principle of a heat pump is similar to a reverse air conditioner, which absorbs heat energy from the atmosphere and applies it to the water in the water tank. This technology has been widely used in industrial applications as well as residential water heaters.
The working principle of CO2 is similar to that of a traditional heat pump, except that it uses CO2 as a refrigerant. Due to the unique characteristics of CO2, CO2 can operate very efficiently in a wide temperature range. It can extract heat from the air down to -20°F or higher in a single heating stage, thereby raising the water temperature to 150°F at a rate of 0.3 gallons per minute. As a result, compared with traditional hot water systems, the electricity required to heat water is much less, and it can work without a backup coil in a very wide range of climates.
Although a CO2 system is the perfect choice to replace existing gas or electric hot water tanks in any residential or multi-family application, being able to work at a lower outside temperature and still supply hot water at 150°F means that the same system can It is the solution for the entire current new low-energy house.
The CO2 heat pump uses CO2 as a refrigerant, which is harmless to ozone and does not cause global warming
A heat pump uses a small amount of energy to move heat from one location to another. In the CO2 system, the heat in the air is absorbed by the natural refrigerant CO2, which is harmless to ozone and will not cause global warming.
The warm gaseous refrigerant circulates through the system through the compressor. As it passes through the compressor, its pressure rises and so does its temperature. This hot refrigerant then heats the water through a heat exchanger, and then pumps the water to a storage tank.
The efficiency of the CO2 heat pump:
The efficiency of CO2 heat pump is about four times that of traditional electric water heating technology. It uses minimal power and ingenious technology to heat water to 90°C by extracting heat from ambient air. Even better, this process will not cause global warming, nor will there be any risks associated with traditional combustion.
DHW plus space adjustment:
The CO2 heat pump water heater has a delivery capacity of 15,000 btu/hr and can be designed as a system that can provide all domestic hot water (DHW) and hot water for space regulation. This is achieved through a circuit that supplies power to the DHW mixing valve to reduce the temperature to 120°F, and the other circuit provides a standard heat exchanger with hot water radiators, radiant panels or forced ventilation fan coils.
For homes with a design temperature of 12°F or higher and a heat load of 8kbtu/hr or lower, this can be the entire DHW and space conditioning system. An additional on-demand hot water heater system can be added to the design of a home with a larger heat load, or a backup system can be used to provide extra capacity for extreme weather events or large homes, where all time except the coldest days Both can be provided by the default heat pump system.
Multi-family DHW project:
The efficiency of CO2 heat pumps is attractive for new multi-family projects, but 43 and 83 gallon water tanks are difficult to install in buildings because of the small space. With the new 119 to 505 gallon tank, the situation has changed. Large-scale building designs have been developed and tested in the past few years, combining these units into heat pump arrays to serve larger primary storage.
The use of air source hot water heat pumps is increasing:
Consumers around the world are increasingly looking for sustainable, cost-effective alternatives to traditional fossil fuel equipment. Using natural carbon dioxide as a refrigerant and achieving a high performance coefficient (COP), carbon dioxide heat pumps provide ecological and economic benefits.