When looking for an air source heat pump water heater, one of the most important features to consider is the type of compressor used. Compressors are a vital part of any air source heat pump system, as they are responsible for compressing the refrigerant vapour and condensing it into liquid form. Different types of compressors are available, each with their own advantages and disadvantages. Here we take a look at the different types of compressors used in air source heat pump water heaters so that you can make an informed decision when selecting your system.
The two main types of compressor used in air source heat pumps are scroll and reciprocating compressors. Scroll compressors use two interlocking spiral rotors to compress the refrigerant vapour, while reciprocating compressors use a piston to pressurise the gas. Each type has its own benefits depending on your particular requirements.
Scroll compressors tend to be more efficient than reciprocating ones, as they require less energy to operate and generate less noise pollution. As a result, they are often found in larger systems where energy efficiency is important. However, they tend to be more expensive than reciprocating models and may not be suitable for smaller systems due to their size and cost.
Reciprocating compressors are cheaper and easier to install than scroll models, making them ideal for small-scale applications such as domestic water heaters. They tend to generate more noise than scroll models but provide good performance at lower costs.
Another type of compressor commonly used in air source heat pumps is a rotary screw compressor which operates using two meshing helical rotors spinning at high speed inside a casing filled with lubricant oil. This type of compressor offers excellent performance and is relatively quiet compared to other types, making it an ideal choice for residential applications such as hot water systems or home heating systems requiring low sound levels.
Whichever type of compressor you choose for your air source heat pump water heater will depend on your individual requirements and budget constraints. With so many options available it can seem overwhelming but by understanding the different types available you can make an informed decision about which one is right for you.