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Sanitary Hot Water SHW 30

The CARBOROBOT boilers capable to heat sanitary hot water(SHW) with separate hot exchanger. The hot exchanger placed direct on the side of the boiler. This hot exchanger work only close of the boiler body, with distance from the boiler it is not work.
The hot exchanger have input for the cold pipe water and output for the hot water, what we can use direct or for the buffer of hot water. If we open the hot water tap the cold pipe water will flow in the hot exchanger and the sensor will start the pump of hot exchanger. This pump will run until the tap is open. When the tap we close, the sensor will switch off the pump after some minutes(when the input tube will grow hot from the boiler).
The special feature of this equipment when the boiler body is cold the sensor will switch on the pump at that time also when the tap of hot water is closed. The pump will run until the boiler temperature will higher then switch off temperature of hot exchanger sensor. This temperature adjustable in the box of hot exchanger. It is expedient to regulate around 40°C to avoid the unwanted work of the pump.
If we use this type of hot exchanger than the regulation of the boiler need to make depend to the water temperature of the boiler. It's mean the regulation of the boiler not with the room thermostat, (in this case the boiler can be regulary cool down bellow than 40°C).
The hot water reserve in the boiler is big. One Farmer 40kW boiler with the heating water inside more than 1000kg. This hot mass can serve several hundred litre 50-60°C DHW in a short time. The boiler after falling of temperature of the heating water app. 10°C will start automatically and the SHW source. In the practice one powerful shower and one SHW tap in one time can operate. The hot exchanger module can be dismounted for the cleaning. The cleaning period depend to application time and the water hardness. We recommend to use lime prevention systems. This hot exchanger unit separate can be buy and possible to use for any CARBOROBOT boiler.

Heat capacity app. 30kW/h
Delta t. 40°C (60°C boiler temperature and 10°C pipe water temperature)
Flow through 12litre/min if water pipe pressure is 3 bar

Buffer accumlator

 

 

If we using firewood chamber frequently(more hours every day )than for the CARBOROBOT Farmer need the buffer accumlator.
If we usning firewood chamber only infrequent(1-2 hour time on the week) than not necessary to use buffer accumulator.

For the CARBOROBOT Classic types not necessary install buffer accumlator, but if we build compose system with solar than it is important part..

 
Compose heating system

 

Tube heat exchanger



Shell and tube heat exchangers consist of a series of tubes. One set of these tubes contains the fluid that must be either heated or cooled. The second fluid runs over the tubes that are being heated or cooled so that it can either provide the heat or absorb the heat required. A set of tubes is called the tube bundle and can be made up of several types of tubes: plain, longitudinally finned, etc. Shell and Tube heat exchangers are typically used for high pressure applications (with pressures greater than 30 bar and temperatures greater than 260°C).[2] This is because the shell and tube heat exchangers are robust due to their shape.
 
Plate heat exchanger

Another type of heat exchanger is the plate heat exchanger. One is composed of multiple, thin, slightly-separated plates that have very large surface areas and fluid flow passages for heat transfer. This stacked-plate arrangement can be more effective, in a given space, than the shell and tube heat exchanger. Advances in gasket and brazing technology have made the plate-type heat exchanger increasingly practical. In HVAC applications, large heat exchangers of this type are called plate-and-frame; when used in open loops, these heat exchangers are normally of the gasketed type to allow periodic disassembly, cleaning, and inspection. There are many types of permanently-bonded plate heat exchangers, such as dip-brazed and vacuum-brazed plate varieties, and they are often specified for closed-loop applications such as refrigeration. Plate heat exchangers also differ in the types of plates that are used, and in the configurations of those plates. Some plates may be stamped with "chevron" or other patterns, where others may have machined fins and/or grooves.

 

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