Rus Articles Journal

What water heater to choose? I do not know

what percent of our population is made walruses but also it is so clear: for the vast majority impossibility to take a warm shower and to be washed - ordeal. Especially during a heat when soft drinks and ice cream give only short-term relief, and the only opportunity to recover after the intense working day - to take a shower. But not to climb in a shower which temperature does not exceed 15 degrees! And here still the basin with dirty ware waits When cease to disconnect hot water?

When will cease to be disconnected?

Alas, dear fellow citizens, it is not necessary to count on it soon. It is impossible to refuse scheduled maintenance: according to experts, wear of heating systems at us - not less than 25%, and only timely identification and replacement critical sites insures us against accidents. Prevention only in new areas where for laying of thermal highways pipes in polyurethane foam isolation are used is not carried out. In such isolation there is a sensor reacting to a namokaniye that gives the chance to exercise operating remote control both precisely and to quickly define the place of damage.

Naturally, there is a question: why not to change all old pipes for new? It appears, this very expensive action: replacement of 1 km of the pipeline costs 100 million rubles. For Moscow, for example, replacement of 2250 km of the old pipes which are under authority of MTK (one of 2 - x the companies giving to Moscow hot water), will be required 225 billion rubles.

A conclusion is obvious: it is necessary to solve a problem with hot water. Especially as it is absolutely simple to make it: the market offers a set of models of water heaters.

Two ways to heat water

a Variety of types of water heaters is so big that not at once and you will understand. However, with the simplest of them - the electric kettle - we are also well familiar long ago: at the power of 2 kW it brings to boiling 1,5 - 2 l of water in only 3 - 4 minutes. But when it is necessary to heat a large amount of water (for a bathtub, for example, all 200 l are required), it is necessary to spend much more energy. And as, as it is known from a school course of physics, energy is equal to work of power for a while, there are two opportunities to receive big energy: or using big power, or spending a lot of time. According to it and water heaters happen 2 - x types: flowing and accumulative.

The flowing water heater

In the protochnik differing in very modest dimensions at the expense of big power occurs an instant warming up of a heating element therefore water manages to be warmed for that short time while proceeds along it. Therefore warm water begins to flow at once as soon as you open the crane, and flows until you close it.

Thus, the protochnik gives almost unlimited volume of warm water, but the stream density (stream thickness) is defined by the size of the power brought to the device: the more a stream, the above there has to be a power. So, if for the stream sufficient for washing of hands and ware, there are enough also 3 kW, then for a comfortable shower the power of a protochnik has to be not less than 4 - 6 kW. For this reason the flowing shower water heater is not suitable for houses with gas stoves where the greatest possible loading is limited to 3 kilowatts, but will perfectly serve owners of the electric stoves having up to 8 kW at the order.

And are capable to replace with the 12 kW Protochniki completely centralized hot water supply above. Such water heaters often are established in the cottages having autonomous power supply. The model range of powerful protochnik is very wide. It includes as hydraulic protochnik with the copper or spiral heat exchanger, and protochnik with electronic control.

An accumulative water heater

At installation of the accumulative water heater representing, in fact, a boiler combination with a thermos, no problems with power supply arise: even the socket in the rural house is capable to provide 2 kW. However process of heating of water takes considerable time (for the 100 l store - more than 2,5 hours). However, this water heater therefore is called accumulative that accumulates heated water, keeping its temperature for a long time; therefore, the water heated earlier did not come to an end yet and only the new portion is heated, long it is not necessary to wait.

It is clear, that the amount of warm water is limited to the store volume why involuntarily there is a desire to install the store more. But the device storing all heated water in own belly can have very impressive sizes therefore to enter it in the small-sized apartment it appears sometimes an unsoluble task. But at the dacha where there is usually enough place, the store appears as it is impossible by the way.

And how many warm water is required to us on satisfaction of all needs? the Scrupulous calculation which is carried out in Germany showed that the person during the day spends about 140 l of water of which warm water makes slightly more than a half (84 l). (The similar calculations at us which are carried out to Soviet period gave a little big figure of the general need for water in a day - 195 l, but we never differed in special economy). Such amount of water is necessary to the person that 2 times a day to take a shower (52 l), to wash - to shave (15 l), to wash the dishes (9 l), to clean the apartment (8 l).

Leaning on these figures, the volume of the store can be counted taking into account a number of people in a family, and also temperature to which water in this device can be heated. Very hot water is practically not used: water temperature for washing - 38 - 40 degrees, for a shower - 40 - 50 degrees, for washing of ware - 50 degrees. But than water temperature in the heater is higher, those with a large amount of cold water should mix it for obtaining comfortable temperature, and, so the you will be able to use a large amount of warm water.