Expansion vessels or automats in the separate systems contain a certain amount of water depending on the pressure present. If the systems come into contact with each other, these pressures will level out, allowing water to flow from one system to the other. If the systems are then separated again, there may be too much water in one system and too little water in the other.
Heating and cooling installation use water for the energy transfer because it’s the most costeffective medium and most readily available, stable resource. Water expands when is heated, andcontracts (volume reduces) when cooled. To accommodate expansion and contraction storage isrequired. In general there are two types of system for accommodating thermal expansion, Sealedsystems (Closed) and Open vented systems.
Like every closed system in which a liquid’s temperature changes, a solar installation also needs anexpansion vessel. However, there are some important differences between systems for solar andcentral heating systems with regard to the location of the expansion vessel and the calculation ofthe necessary capacity. This is due not only to the medium used but also the way in which solarsystems work.
The calculation for the expansion of a heating pipe and the resulting construction is well known. However, there is less information about the requirements and consequences for the moving (nonfixed) point mountings of the pipe. In this paper we will discuss these requirements and consequences for the moving (non-fixed) point fixings.
Air bubbles and dirt particles accumulate in the water in heating, ventilation and air conditioningsystems, and give rise to corrosion and resistance in a system. This leads to reduced efficiency anda greater likelihood of broken parts, with potentially expensive repairs as a consequence.
This white paper takes a closer look at the phenomenon of making branches. What do you have to lookout for? What techniques are available? What are the advantages and disadvantages of these techniques?
This white paper provides a quick comparison of the Flexcon M-K/U versus the Flamcomat and will discuss these products unique selling points. The paper concludes by answering 'Frequently Asked Questions'.
In practice you will find expansion vessels with the water connection on bottom, and with theconnection on top. In this hite paper we want to expose what philosophies are behind the positionof the water connection.This white paper discusses the difference between different types of vessels, the annual check and end-of-life disposal.
It seems unusual in our industry to consider all the aspects of a system working together, even though this is what we are aiming for. The aim of this white paper is to promote ‘Joined up Thinking’.;
Potable water is a vital asset, everyone uses it. Although much of our planet is covered with water, we increasingly hear about impending shortages of clean potable water. One way to counteract some of the wastage of potable water is to use expansion vessels in potable water systems with calorifiers. When potable water is discharged from a calorifier through the pressure relief valve not only is this a waste of water, but energy is also wasted on heating this water.
There are many theories about the best pressure to fill a central heating installation with in relation to the pre-pressure of the expansion vessel and the final pressure in the system. An incorrectly set system can cause problems:
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From the heat source to heat emission to heat distribution, Flamco, Meibes and Simplex cover a broad spectrum of innovative building technology systems. This internationally active group of companies has specialised in technical products and systems in the fields of installations, heating, cooling and solar solutions. The sister companies belong to Aalberts Industries N.V. of the Netherlands.
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