Bouilleurs de France is a registered trademark and has a patent.
SARL BOUILLEURS de FRANCE au capital de 50 000 € - RCS de Bergerac n° 800 968 190 - APE n° 2521ZZ
Here we will analyze the operation of a kitchen of our control lighting the fire until its stabilization system.
- 1) Starting conditions : The water in the central heating circuit is at ambient temperature of 20 °C. The water in the flue boiler is at 20 °C as well.
We assume for this example that if a boiler is installed it is off.
-2) Lighting the home, after ten minutes the smoke reached 130 °C and smoke controller is in the ON position, but the pump is not yet in service, since the water in the lower part of the boiler is not yet reached a temperature of 45 °C and that two conditions must be met for traffic starts.
-3) After a variable period depending on the force of fire and model of flue boiler installed (from 5 to 32 liters capacity) of water in the lower part of the flue boiler reaches 45 °C and the flow begins. The water in the upper part (output) of the exchanger is around 60 °C and goes towards the radiator system or to a storage tank or coil DHW tank. The water returns to the boiler when it is at 20 °C, which is cool in the base and eventually cause the pump off when the temperature is decreased to 43 °C.
- 4) A new heating period begins, until the water in the lower portion back to 45 °C. This cycle will be repeated several times until the entire system is temperature rise. Once the water in the return exceeds 43 ° C traffic will be uninterrupted.
- 5) scenarios that can occur:
a) The power dissipation is equal to the power produced : The system will find its equilibrium which can be modified to the effect of fire.
Traffic will be permanent after the period of temperature rise. This is often what happens in the case of a partial heating system where the number of radiators is limited, and also when a hot water storage tank or storage using a coil is installed in the "consumer" of this energy.
b) The power dissipation is greater than the power produced : Traffic will be by intermittent depending on the importance of the difference in power. The energy produced will be identical to the case before, but installation requiring more kilo-watts that the flue boiler can provide is a boiler or a solar system that will provide extra. This situation is typical of a system in boiler back.
c) The power dissipation is less than the power produced : If it comes to radiators delivering their rated power at a given temperature, this value is exceeded. For example, if a radiator that delivers 2000 watts power with water at 60 °C, the heat loss will be greater than 2000 Watt if the water circulates at 70 °C, etc. This principle is sufficient to achieve an equilibrium at a higher temperature than normal, but it will not be the gap becomes too large otherwise the power can not be dissipated which could cause the water to reach its boiling point (120 °C at 2 bar pressure). This case is only theoretical, in practice the study of the system and aid in the design of the project our clients allows us to not let that happen. Mounting a C75 instead of C150 can solve this probème.
d) The power dissipation changes after a threshold is reached : This is where the boiler is used to produce hot water. Experience shows that a few hours are enough to heat 20 to 70 °C to 300 liters of water from a hot water heater outlet. What heat will continue to be produced then if the fire is still active (eg 24/24h)? The most economical and easiest solution is to use a sensor in the tank to control a 3-way valve all or nothing which will effectively redirect the hot water to a solution of shedding the heat.
A good sized single radiator enough to fulfill this mission.
eg installation of a radiator 2.5 kilowatts in the garage, the heat being free as well enjoy it!
Chapter 4 : Analysis of running !
This light indicates that the absolute temperature is reached on the water at the bottom of the exchanger = 55 °C.
The pump is activated.
It also indicates the release in case of temperature at 5 °C and 450 °C the alarm on fumes.
(closed alarm relay : see page wiring diagram)
This light indicates that the temperature setting is not reached on the two regulators (flue = 130 °C and water = 45 °C)
The fire is not, or has just been switched on or is too low.
Left = minimum temperature of flue release
Right = minimum temperature of water release at the bottom of the exchanger
- The settings of our temperature controllers are done in a workshop and equipment are modified by us to meet our requirements
- The two temperatures shown on the image above to be achieved against that traffic can start (flue 130 °C and low water exchanger: 45 °C).
Access to temperatures trigger is allowed in the following ranges:
The flue gas temperature :
1) Temperature adjustable flow trigger 130 to 180 °C
2) Difference between the trigger and release the 2 °C (On = Off 130 to 128 °C) - Fixed Value
3) Delay between two actions: 0 minutes = immediate - Fixed value
4) Adjust the temperature reading + or - zero °C - Fixed value
5) Temperature alarm 1: 450 °C - Fixed Value
6) Temperature alarm 2: 5 °C - Fixed value
7) Alarm delay 1 and 2: + or - zero = immediate - Fixed Value
The water temperature at the bottom of the exchanger :
1) Temperature adjustable from 45-55 °C
2) Difference between the trigger and release the 2 °C (45 = Off is at 43 °C) - Fixed value
3) Delay between two actions: 0 minutes = immediate - Fixed value
4) Adjust the temperature reading + or - zero °C - Fixed value
5) Temperature trigger absolute circulation: 55 °C - Fixed value
6) Temperature déclencehement antifreeze circulation: 5 °C - Fixed value
7) Delay antifreeze and absolute trigger: + or - zero = Immediate - Fixed value
Caution ! Both conditions Adjustable temperature 130 and 45 °C must be achieved so that traffic can be performed (series connection) unless the absolute temperature of the water at the bottom of the exchanger is reached (55 °C) .
The installation of a heat exchanger Bouilleurs de France, based on the principle of heat recovery usually lost in the flue system must be in accordance with some simple but essential rules, to hope maximum efficiency. In addition, a registration must be made in two additional cases:
a) when the fire is reduced to the extreme but the coolant heated above a certain threshold (55 °C).
b) When the temperature drops below 5 °C, which implies a risk of freezing the installation and therefore the absence of "problem" unexpected.
Rule # 1: The cooling of the smoke should not be permitted within 130 °C for the latter, after passing through the heat exchanger. This value does not fall below the temperature at which a dirty driven by bistrage (paving) may appear.
Rule # 2: When the start of the flow of cold coolant, it should not cause a "brutal" cooling exchanger which would lead to a similar result at the bistrage.
To guard against potential setbacks and ensure the optimum operation of our exchangers we have developed a technique for controlling the flow of coolant that is simple, but demonstrates a perfect efficiency.
Basic settings of Bouilleurs de France
Chapter 3 : Thermal regulation Bouilleurs de France !
Left - Image # 4 and right - picture # 5
Thermometers glove finger 100 mm
left T ° C return radiators - right T ° C starting boiler
- Image # 4 is mounted on a glove finger thermometer shows the temperature of the water from the radiators and up to the input of the boiler. Like its little brother to smoke, this device has an inertia that can be attributed to both the length of the sensor (100 mm) and the slower rise in temperature of the copper pipe where the water circulates.
The K-type image sensor No. 3 "A" indicates 55.3 °C which is consistent with the 55 °C played on this analog thermometer.
Note that the sensor at the bottom of the boiler (Fig. 2 right) measures a temperature of 63 °C, the water in this part of the exchanger is already raising the temperature a few degrees.
- Image # 5 displays an identical thermometer but this time the extent of 61 °C is that of the water in the exchanger outlet. Compared to the image measures 3 B there is the same difference caused by inertia and it will take a few minutes for this gap is narrowing, and then disappears.
In the end we can see that the gap inlet / outlet water was 11.7 °C which corresponds to a power output of 6107 Watts with a flow rate of 450 liters / hour.
Flow rate in liters x delta T °C = 450 x 1.16 x 11.7 x 1.16 = wattage = 6107 Watts
Chapter 2 : The temperature of the water !
The mechanical thermometer led to see his reading interpreted to give a correct assessment of the outcome.
Temperature measurement from outside the pipe is reliable and tripping at 130 °C (about 200 °C actual) optimizes hot water production while avoiding fouling and tarring (bistrage).
The outbreak of the movement must be validated by one of the water temperature at the bottom of the boiler through a serial connection (see Chapter 2).
All pictures published on this page were taken with less than a minute apart.
- Image # 1 shows the temperature reading on the outside of the pipe with a mechanical thermometer acting expansion of a spring. This is a simple device to control a very low cost (€ 21.78 including delivery), but the results should be interpreted. At the time of picture taking the temperature of the thermometer reads 230 °C.
To make a significant extent it is necessary to allow the temperature to stabilize for a few minutes, mainly due to the inertia of the device, which does not provide an instantaneous reading.
The températrure read a few minutes after taking this picture had reached 255 °C
- Image # 2 shows (left) the outer pipe temperature taken with a K-type sensor 40 cm fixed applies to the same height as the thermometer image 1. Reading indicates 348 °C which shows the gap between the first two methods of measurement. The temperature controller is calibrated left to engage the flow of water from 130 °C temperature of the smoke (in series with the regulator right calibrated at 45 °C min of water).
- Image # 3 shows reading "D" outer pipe temperature taken by a K-type sensor 2 cm attached to the same height as the previous two and connected to a meter PCE-T390 probes. Reading indicates 350.6 °C. We note that both of these two temperatures snuff sensor K are almost identical.
The measurement reading "C" image 3 shows the actual temperarure, 452 °C, the smoke inside the duct through a K-type sensor placed after drilling a small hole 3 mm in diameter .
- To conclude :
Image # 3
Screen digital controller memory PCE-T390
A display : system return water temperature radiators
B Display : starting temperature water circuit of the boiler
C display : temperature - inside the duct
D display : temperature - outside of the duct
Image # 2
Boiler control system of France with sensor Type K
left: sensor 800 ° C in the flue gases
right: sensor 200 ° C on the low water exchanger
Chapter 1 : The temperature of the flue !
Image # 1
Thermometer leads magnetic (steel) or screw (stainless steel)
Measure 30 cm above a C215 after heat exchange: 230°C
Before to the acquisition of a heat exchanger Bouilleurs de France, the company asks you to control the temperature of your smoke.
It is important that this is done to ensure good efficiency of our interchanges.
Knowing that the smoke will be cooled to about 50% of their initial temperature (eg C150) should be a minimum of 260°C is found that after heat exchange fumes are still beyond 130 °C. to avoid problems dew point (condensation) and bistrage duct.
Warning: It should interpret the results of this measurement as a function of the control device used and the method used.
Indeed, large differences can be found between several different control methods and locations of thermometers or sensors.
This page is designed to help understand the principle of regulating the flow of coolant
(water most of the time) for a system BOUILLEURS de FRANCE.
The recommendations concerning how to manage the flow of water in the boiler by controlling the temperature of this water shall remain valid for any system of home-exchanger reboiler which is internal to the unit and burns wood log.
The control of Bouilleurs de France
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it is the intelligent heating, which quickly pays for itself !
Heating most economical and ecological to warm you thanks to the smoke of your fireplace or your stove.
An innovative way to produce hot water, a perfect blend between wood burning and solar.
Our product does not cause any additional consumption of wood, it uses waste heat from the smoke stack.
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