Homemade heat accumulator: how to save on energy

The heat accumulator of the metal tank for the heating system based on coal-fired boiler: manufacturing and operating features

How to improve the efficiency of coal-fired boiler? Reduce the cost of energy purchase? Reduce the number of burners (number of sets of zabroske / loading coal or wood into the boiler) per day? The answer - to set the buffer capacity, so-called.. heat accumulator, and "recharge" its energy from the heat source - heat the water reserve. And then, as necessary, to spend it for the heating system. Heat accumulator can buy ready-made - the factory, or try to save it and make their own hands. The successful implementation of homemade products will be discussed in this article.

Content:

• How to make a heat accumulator for the coal-fired boiler from the tank
• How to connect a buffer tank in the heating system with a solid fuel boiler
• Experience in the use of the storage tank

Homemade heat accumulator for TT boiler from the tank by a fire engine

Sjawa

user FORUMHOUSE

We have expensive gas. Therefore, apart from the gas boiler of 24 kW, which I heat the house now, I buy solid fuel (DC) power boiler is 20 kW. Heated area - 135

m². From it: 110 m² Heated underfloor heating and 25 more m² radiators. TT boiler after installation, almost paid off for the season. I believe that the installation of the storage tank (TA) will increase the efficiency of the heating system. In the offseason, with the TA, in general I think to go only for heating the solid fuel boiler and gas boiler used as a backup and a quick reheat coolant. Then I plan to save even more - put Solar collector, and will kick off the summer with his "khalyavnykh" energy in the buffer tank.

First we show the heating circuit Sjawa.

And now we show how the user has made a thermal battery. Basis TA - b / a drum - tank 1.5 m³ of a fire truck.

Important.If the TA under makeshift containers used barrels / from the fuel tank (Fuels and lubricants), then, in order to avoid accidents, ie. A. Pair retain flammability many years, you need to be especially careful when workingEspecially welding.

V757V

user FORUMHOUSE

I once talked to one benzovozchikom, and he told me that they have, at the tank farm, cook tank. Poured into water tub to the eyeballs. Putting up the raft with a burning candle, and slowly poured water. Water oozes out, and anything that can burn, burn out quietly as the container is empty.

From the tank the size of 2 (height) h1.35h0.75 m cut off all unnecessary.

T. k. heat accumulator is placed vertically to a tank filled with water not inflated, the user has made a "screed" of pipe diameter of 22 mm.

"Ties" reinforced washers, though, according to Sjawa, it's too much.

Luc tank is used as an audit and tapping heaters (tubular electric) with built magnesium anodes 3 pcs. 2 or 3 kW.

The water in the TA will also heats up electricity at a cheap night tariff.

Parts hatch.

The bottom section of the tank TA 4x4 cm reinforced profiled pipes.

Welded tubes for binding TA boiler and heating.

Top TA also enhanced, differently from its bulged pressure during heating water.

Cooked homemade collector.

The hatch welded couplings for heating elements.

The base under TA made of plywood and timber-section of 100x100 mm slotted to pipes welded to the bottom of the tank is not pressed to the base.

The base under the heat accumulator insulated foam.

In parallel with the TA for the manufacture of heating systems come complete. Thermostatic valve.

Circulation pump with cranes, which are then replaced with "American".

Heating elements with magnesium anode.

sealing caps Sjawa I made according to original technology. First, the user condensed cover sealant. Replace the cap bolts 16, but when tested TA pressure 2 bar from under the roof was water trickles. Cut a pad of rubber Homebrew not. Too difficult, and there are no guarantees of tightness. Eventually Sjawa manufactured silicone gasket.

Step by step instructions for its manufacturing.

• The place where the gasket is placed colored, ie. K. A silicone upon contact with the unprotected metal black activates corrosion.

• With hot melt glue along the rim cover glued beads.

Then, the user pre-calculate the volume of the gasket, he took bottles with silicone, and filled all the space between the shoulders, gradually smoothing silicone old credit card.

The thickness of the gasket 8 mm.

Sjawa

Immediately warn that the silicone dry for about a week. The beads I shot on the fourth day. When everything has dried up, it turned an elastic silicone mass. I drilled holes and then on high speed tool. Bolts are an interference fit and, when bolts are clamped, the further seal the junction. Budget engineering solutions - 3 sanitary silicone balloon (balloon actually took 2.5).

Ring (2 pcs.) Cover homemade welded from roll circumferentially of two metal brackets.

Node - tank-ring-Cap-ring assembled on the first tack and then drilled all the holes. This provided a highly accurate interfacing details.

Scheme neck storage tank lid.

So, homemade thermal receiver is ready. The user has started a routine work - TA trim boiler and its connection to the heating system. And that's what happened.

Knots close up.

Wiring diagrams of the buffer tank to the solid fuel boiler and the heating system

Subject Sjawa It aroused great interest in the portal. Users began to discuss joining the TA scheme to the boiler.

ZelGen

user FORUMHOUSE

Looked heating circuit. Came the question, why the entrance to the TA is a little above the middle of the tank? If the input is to make the top of the buffer tank, the hot medium from TT boiler is fed directly to the outlet without mixing with the colder carrier TA. Capacitance is gradually filled with hot heat carrier from the top down. And until the warm upper half TA, which is about 500 liters of hot carriers into the TA was stirred and cooled.

According to Sjawa, Commissioning heat accumulator is made as to the best EC (natural circulation if disconnect electricity) and to reduce excessive mixing of coolant when the heat of CO does not take his or selects few. T. k. Laid at the beginning of the heating circuit with TA general, the user sketched more detailed embodiments work capacity.

Scheme 1.

Scheme 2.

Scheme 3.

Scheme 4.

Sjawa

As can be seen, the opening and closing valves can implement different options to include, but I is set to option 1 and 2. The bottom of the storage tank above the boiler bottom by 700 mm. Nozzles belonging to TA 1 1/2 ', and extending in a CO 1'. The variant with the upper nozzle placement suitable for the TA with coils inside, for indirect heat medium heating.

As a result, the user slightly modified scheme of putting a bypass between the inlet of the storage tank of the solid fuel boiler and the heating system supply and return line.

This made it possible to change the storage tank connection diagram with the parallel to serial. For example, it ended the heating season and heat accumulator is cold, but much colder, it is not warming heat accumulator, quick to heat the boiler house.

Operation of the storage tank with a solid fuel boiler: a personal experience

Interesting findings from the user manual of TA:

1. Mode enters the boiler + 80-85 ° C for 10-15 minutes. As a result, no soot and smoke. After two or three furnaces burnt resin deposits and stains from the last condensation. Field two weeks of work in the optimum temperature range, the furnace of the boiler has become almost like new, only now in ashes. Wood in the boiler burned completely, with a maximum heat release and the heat source is not driven into decay mode.

If lower coolant temperature below 60-65 ° C, in the combustion chamber TTC conditions for condensation (harmful acids).

2. Solid fuel boiler in tandem with the accumulator tank operates at maximum efficiency both in winter and in the off-season when outdoor temperatures between 0 ° C - -5-10 ° C. Excess heat from the boiler well raskochegarennogo simply discharged into the heat accumulator, and then, as required, consumed coolant.

This reduces the number of burners TTK and increases the comfort of use. With the TA does not need to get up at night and throw fuel in the solid fuel boiler.

3. The water in the TA "charged" layers:

• Top - +80 ° C.
• Mid - + 65-70 ° C.
• The lower part - + 50-60 ° C.

4. When the boiler is not operating, the water temperature in the lower part does not drop below the return temperature, and the top is gradually discharged. according to the observations Sjawa Vyshenapisannogo temperature TA to "charging" for 3-4 hours. If there is no frost on the street, and most of the branches are closed underfloor heating, the heat removal decreases in CO and TA charge faster.

• The thermostat is mounted on the output stream from the water tank to the heating system. According to the team, if the water temperature drops to + 40 ° C, reheating to activated gas boiler.

Sjawa

When fully open the boiler flow temperature podduvalom max +90 ° C. Typically, the temperature is kept + 80-85 ° C. Heat accumulator is charged layers. First, increasing the temperature of the top, and then the middle and the bottom. For example, when the top is heated to flow temperature, heating medium temperature begins to rise in the middle of the TA (top and remains 80-85 ° C), the temperature further increases downwards.

Heat accumulator should be well insulated and put vertically, as Hot water is concentrated in the top of the container.

The question arises, whether the lack of such a volume of TA at the house in the cold? according to the calculations Sjawa his house at a temperature of -25 ° C, heat accumulator needs to 5000 liters. To quickly heat a volume of water required boiler capacity of 50-100 kW. But being spent on expensive system, With a large supply of coolant, Only because of the severe frostsThat can survive only a few days a year (in the worst case, a couple of weeks), or may not be at all, unprofitable.

It triggered a rule: the price-system efficiency.

Sjawa

For the volume of my water tank, according to the rules, you need a boiler capacity of 20-40 kW. I have a boiler of 20 kW. 30 kW would be ideal, but is content to have already purchased. Better to let the boiler operates at 100%, giving a maximum efficiency, than to take too strong a heat generator and its drive at reduced power.

For information: on a well warmed house of about 150-200 m² would be enough for TA 1000-1500 liters.

Learn all the details of operation of the storage tank can be improvised in the subject - heat accumulator from the barrel of a fire truck.

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