Simple heating system with a solid fuel boiler and accumulator tank. Personal experience

The simplest heating system based on TT and TA with one circulating pump

The most affordable source of energy - gas, that's just it is not available everywhere. Someone in the amount requested by the gasman, is one hundred years old drown electricity, and before someone gets on all fours gasification. Those who are interested in an efficient and economical way of heating at FORUMHOUSE have a history of a user with the nickname Pretzel.

Requirements for the heating system

The task was to make a heating system (SB) in a two-story suburban house insulated total area of ​​60 sq located near Tver.

Variant only one type of boiler - is solid wood (TT) as the backbone to the gas pipe, as far as China. More precisely from the village - 1 km, and this at the Tver region very far.

The heating system should be as simple and cheap. Heat necessary room of 25 sq.m, 10 sq.m kitchen, hallway and bathroom on the second floor of 16 kv.m.po leftovers.

Make an addition to the house, in which the boiler will be placed.

Accessories and calculations

For such a space suit 6kW boiler, which is most of the time will work in dim mode, which adversely affects the efficiency.

All have been invented, however the heat accumulator (TA) is input for the boiler CT optimally in SB. The system should be cheap and made with his own hands, so you can forget about the EC. As a result, minimal circuit should have a CO: TT boiler TA and circulation pump.

If the system is the one that does not make sense to use a low-power boiler. Since the price benefit is small compared to the more powerful, and the loss of usability is palpable. Therefore, take the pot, even with a small margin is not necessary. Better to take a pot with 2, 3-fold power reserve and pick up the thermal battery under it. Calculation for TA need with simple enough:

The formulas are simplified to reduce the calculations. Therefore, the change in discharge temperature TA of 10 degrees is added. The coincidence with the exact formula of 99%.

There is a heated area- 35 sq.m. For a given area is necessary to give at least 3.5 kW heat overnight. Such heat can be stocked in TA volume of 400 liters. That is, the water volume of 400 liters per night to cool down from 80 to 20 degrees. At the limit, but it is 3.5 kW rating for a cold night. Under normal conditions, the temperature does not drop below 10 ° C, therefore it is possible to use the estimate TA 400 liters as the minimum acceptable. Search TA smaller volume is meaningless.

The boiler capacity of 10 kW charge TA for at least 2.8 hours. In the wild, it will take more time. If you configure the battery at the lowest level at which they have to keep the temperature during the day, the power given to the TA is equal to 1.1 kW. Indicators are not very good, but tolerable.

implementation

On the internet, two flat tank were found 1.5h0.6h0.4, of 360 littres each with a threaded port on the price of 5 tr In principle, the options are not many, so were purchased. Tanks flat, therefore need to be strengthened, since at 1 atmosphere in excess of the tank wall 1 sqm area. It weighs 10 tons. Since the two-storey house, it is greater than 1 atm will not pressure system.

One tank was reinforced with 4 zones of the corners.

The simplest system of CO as follows. Hot water from the boiler goes directly to the heating circuit. That is, there is no by-pass boiler itself. Therefore, with CO it can be used only boiler with a large reserve power relative heat capacity batteries. For a given thermal output CO CO order of 2 kW. If the boiler will produce 10 kW, the presence of cells on the return line does not noticeably affect the temperature at the circuit output in the operating mode 60 oC. Excess power boiler must be somewhere to merge, otherwise we will have to reduce the capacity of the boiler, and this leads to a drop in its efficiency.

Therefore, after the battery is installed and the circulation pump flow TA. TA forms a second branch return pipe to the boiler. In order that the temperature would not drop below 60 grudusov anti-condensation using three-way valve. Note: Three-way mixing will not work !!!

The principle of operation of the heating system with accumulator tank

The system works as follows. The boiler is set to 85 degrees supply. After the start of the furnace to CO immediately supplied hot water. The circulation pump is set to maximum speed. Hot water through the battery and the balancing valve is supplied to the boiler return line. Three-way charging overlaps TA until the water in the main circuit is not warmed above 60 ⁰S. After the warm-up, three-way partially and then fully opens the charging branch TA. The boiler works for heating, and the heat is not diffused heating panels is stored in the TA.

The system is assembled and running. The truth is the ultimate scheme differs and refined by heating the 2 nd floor. Used 14kW boiler. TA is set discharge branch directly through the heating circuit, bypassing the boiler. Since in this circuit discharging TA passes only through the boiler, and the boiler extinct when it leads to unnecessary losses of heat. And the attempt organization at least some minimum EC by TA during a power failure.

Follow channel. Share on social networks, so that others, too, were able to save on heating in anticipation of gas. Join craftsmen FORUMHOUSE.