A heat pump chills, or heats some kind of water, or air, with the help of compressors.
The liquid to be cooled or heated is usually pure water or a mixture of water and glycol, but in special cases it may be an oil or liquid from a food industry.
Heat pumps are used in cases where we do not want to use conventional heating solutions for winter or temporary heating, but for a modern energy saving solution. When using a heat pump, it is not necessary to install a separate chiller and separate heater (eg boiler), only a water-side system is required. Because the heat pump is suited to meet changing temperature requirements, it is most commonly used in human environments and not for industrial purposes.
The Air to Water heat pump can perform its function on its own, without the use of other air conditioninng unit. They can be ideal for both commercial and industrial facilities. Due to the design of the Air to Water heat pump, the installation of all the caloric, hydraulic and electrical components needed for cooling in one unit is very simple and cost effective. Within the building, only the water circuit pipes need to be laid. Another great advantage of the Air to Water heat pump is that it has no noise inside the building during operation. The heat pump is made of weather-resistant materials, making it ideal for outdoor installations. The electrical parts are dust and drip-proof and conform to the European standard (CE).
In terms of placement, a distinction is made between outdoor and indoor (also known as ducted) Air to Water heat pumps. Outdoor heat pumps are usually fitted with axial fans, whereas indoor heat pumps are equipped with higher pressure (eg centrifugal) fans. The latter are usually used in case of lack of outdoor space. The heat generated by the heat pump is transferred to the building by a water transfer medium, where additional units (eg fan coil, air handling unit, etc.) can be used to produce the desired temperature conditions in the spaces.
The Water to Water heat pump alone is not capable of cooling the liquid as additional heat sources (eg well water, ground heat, etc.) are needed. The heat pump equipment is located inside the building. The heat generated by the heat pump is transferred to the building by a water transfer medium, where additional units (eg fan coil, air handling unit, etc.) can be used to produce the desired temperature conditions in the spaces. In terms of the operation of the Water to Water heat pump, we distinguish 2 types. For smaller and more intelligent solutions, the heat pump includes a shift valve, which in itself can reverse the direction of operation (cooling or heating). For larger systems, this shift must be built into the external hydraulic system and solved for shift control.