How to Pick the Perfect Boiler
Boiler is a complex term with many different meanings and specifications. While some boilers are meant to produce both hot water and heat, the term is also commonly used to describe a unit that produces water only, which is much more common in residential applications.
We can’t go into exhaustive detail on every type of boiler to discuss its specifications for each, but we can go over a few key features to help you understand exactly what your boiler does for you.
Types of Boilers
When talking about the differences between boilers, it is useful to talk about types of boilers first. A common question is asked, “Which is the best type of boiler to choose?”
For these reasons, we will first discuss the types of boilers and the different types of them:
- Heat recovery boiler
- Diesel boiler
- Electric boiler
- Combined boiler
- Gas boiler
- Hydronic boiler
- Indirect hot water heater (IHWH)
- Natural boiling hot water heater (NWH)
- Watertube boiler
How to Pick the Perfect Boiler
When it comes to choosing the perfect boiler, the first thing you need to do is know what your options are. To find out, try our free boiler fitting checklist.
Heat recovery boiler
The main type of boilers that produce both water and heat are called heat recovery boilers.
When a boiler that produces both hot water and heat is used, it is normally used as a combined boiler, in which the heat in the boiler is converted in a heat recovery process and transferred to the tank to heat the water. The use of a heat recovery boiler is common today for its economic advantages and the wide range of water temperature to choose from to heat the
Types of boilers
In a general way, there are five types of boilers:
- Heating boilers, also known as hot water boilers, heat water for cooking, hot water heaters or electric boilers. A heating boiler turns heat energy of fuel into heat energy for producing steam for the heating process.
- Steam boilers, also known as steam heaters, are the most widely used boilers for heating or cooking. A steam boiler produces hot water through chemical processes by heating by means of steam.
- Gas boilers (water-tube boilers), these are gas-fired electric boilers; they provide heat for steam pressure cooking and other processes.
- Electric boilers, where combustion heat is produced at the fuel burner, are the most common types of boilers. They are usually used for domestic heating, space heating and other types of processes where heat of combustion is necessary.
- Heat pumps, water-based, are installed on hot days, like in August and September when air temperature is very low and outside temperature is very high. Heat pumps can use the warm outdoor air and cool air as well; they can use hot water as well. Water absorbs energy from cold to produce hot water and heat pumps also can be installed outdoors for outdoor heating applications or for cooling air conditioning air.
- Watt balance systems, also known as electronic control systems, is the most commonly used thermal control system for controlling the temperature in a mechanical room. It controls the operation of a heating boiler, hot water heater or steam boiler to control the temperature of the room.
- Gas-fired heating boilers (water-tube heaters) are one type of steam boilers. The combustion chamber is where fuel supply, i.e. natural gas, oil, or coal, is ignited and heat is produced. The process generates sufficient heat required for the process.
Best types of boilers
Best types of boilers are categorized into three types according to the operating process and working principle of the boiler, namely, thermal, solar and forced draft.
Steam Power Steam generators are the most common type of heating device used in industry to boil water for steam and to raise the boiler’s pressure. A steam generator is capable of heating water to a steam temperature, with subsequent pressure rise and consequent flow of water. As a result a heat exchanger is created, where water is brought to a steam temperature and then pumped back and forth between the system and a boiler.
Solar Power Solar power is power produced by a collector placed over the sun’s rays. The heat generated by the sun heats the air above the collection surface. This heat heats the water flowing through a tube within the water collection surface. As heating continues, water evaporates and collects on the collector surface. The steam that is produced is collected in a boiler and pumped to a use.
A boiler and pressure tank can produce a tremendous steam pressure for any number of uses. However, it is better to learn how to utilize the pressure to power a pump or other process, as described below.
Pressures from Steam Generators
This is the most common configuration for a steam boiler. The system produces a steam pressure of approximately 16 kPa, with a capacity of 150 m3/h.
The pressure can be produced with either two or three of the following methods:
1) Mechanical: The pressure can be achieved with the aid of pressure gauges, by measuring the steam pressure that is produced and then utilizing a mechanism to convert it into pressure readings.
2) Pneumatic: The pressure can be achieved by utilizing a pneumatic regulator to control the pressure.
3) Air Compression: An air compressor can be used to run air-preheater motor that is air-driven, oil guns scavenging purposes in addition to aid atomisation of LDO fuel.