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City Shaman (2009-01-22 17:11) [0] The gas man came today to inspect the water heater, but stated that it was impossible to turn on cold and hot water at the same time. You need to first take the hot one, and then take the cold one, even for washing your hands. Moreover, he spoke so convincingly that I even somewhat doubted his inadequacy. Maybe he's right?
Is it possible to turn on hot and cold water at the same time when using a water heater if the water pressure is normal?
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Ega23 (2009-01-22 17:15) [1]
:))
And in our kitchen there is gas. And you? And we have a gas pipeline. Here.
(C)tyreno
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Correct$Vasya (2009-01-22 17:18) [2]
Should I read the instructions for YOUR column?
mine works fine with one or two threads ← →
Andy BitOff (2009-01-22 17:35) [3]
> Urban Shaman (22.01.09 17:11) [0] > Is it possible to turn on hot and cold water at the same time when using a column > if the water pressure is normal?
Can. The column has nothing to do with it.
In general, I bought myself a Neva Lux 6014 and I won’t keep it any longer.
It can heat up 14 liters per second. Electric ignition. The digital display shows water temperature and fault codes. Temperature adjustment from the display to degrees. And you can completely forget about cold water =) ← →
City Shaman (2009-01-22 17:35) [4]
> Correct$Vasya (22.01.09 17:18) [2] > > and read the instructions for YOUR column? > mine works fine with both one and 2 threads
The instructions say that it is possible, but the gasman says that it is not possible.
So I’m wondering who to believe – the official instructions or the “specialist”? ← →
Correct$Vasya (2009-01-22 17:37) [5]
> The instructions say that it is possible, but the gasman says > that it is not possible
he wanted you to upgrade, and he would install
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clickmaker (2009-01-22 18:00) [6]
> and fault codes
does AV happen?
o) ← →
AlexDan (2009-01-22 18:20) [7]
> City Shaman (22.01.09 17:35) [4] Ask another specialist, or call the installation company and talk to the management (specialist) to explain why exactly it is impossible, so to speak competently..
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Correct$Vasya (2009-01-22 18:34) [8]
> does AV happen? o)
only blue screen
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Virgo_Style (2009-01-22 20:37) [9]
Andy BitOff © (22.01.09 17:35) [3] It can heat up 14 liters per second.
Wow.
Is this a typo or serious? =O ← →
AndreyV (2009-01-22 21:23) [10]
> [9] Virgo_Style © (22.01.09 20:37) > Andy BitOff © (22.01.09 17:35) [3] > 14 liters per second can heat up. > > Wow. Is this a typo or serious? =O
Let's estimate the power of the burner.
If from 0C to 100C, then 4200 J/(kg K) * 14 kg * 100 K / 1 s = 5880000 W = 5880 KW If I’m not mistaken. ← →
Virgo_Style (2009-01-22 21:39) [11]
AndreyV © (22.01.09 21:23) [10]
Yeah... That's what I suspected, I was too lazy to count%-)
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Virgo_Style (2009-01-22 21:45) [12]
Virgo_Style © (22.01.09 21:39) [11] suspected
In principle, what is there to suspect? It’s enough to visually imagine the flow of 14 l/s from the tap, and all suspicions will disappear %-))
And even before the heap, it would be interesting to calculate the heat exchange “heat source-wall-water”, there should also be interesting figures %-)
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KilkennyCat (2009-01-22 21:46) [13]
If the column is working properly, it is possible.
If it is faulty, there may be a gas leak (I have repaired and installed speakers several times while working at a construction site). But, since a faulty one cannot be used at all, this situation can not be considered. So, the gas man will be taken to court for lying. ← →
Andy BitOff (2009-01-22 21:57) [14]
> Virgo_Style © (22.01.09 20:37) [9]
Of course a typo =) Per minute =)
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YurikGL (2009-01-22 21:58) [15]
> A gas engineer came today to inspect the water heater, but stated > that you cannot turn on cold and hot water at the same time. > You need to first draw hot, and then draw cold, > even for washing your hands. Moreover, he spoke so convincingly that > I even somewhat doubted his inadequacy. Maybe > he's right? > > Is it possible to turn on hot and cold water at the same time when using the column > if the water pressure is normal?
Hmm... I recently changed the column. It was definitely not possible on the old one. When I tried to start mixing water, the gas simply turned off. I haven’t tried it on a new one, but the gas guy also said it’s not possible.
I'll guess why it's not possible. There is a water pressure meter (pin) in the column, which regulates the gas supply. If the water pressure is low, it means there is not enough water flowing through. Gas supply decreases. Now, let's start mixing the water. Cold water pressure appears behind the column. Moreover, the pressure of cold water behind the column (in the mixer) is slightly lower than the pressure of cold water in front of the column. Water simply will not pass through the column. In fact, it turns out that the water has two parallel paths, one through the column, and the other directly. The water will flow directly. And pressure will be maintained in the column. Since there is pressure, it means gas is supplied for heating... And God forbid, the temperature sensor (switching off gas) does not work. The water in the column will boil and there will be an explosion.
z.y.
like so. ← →
YurikGL (2009-01-22 21:59) [16]
So if it is possible to turn on cold water at the same time as hot water, then somewhere with a separate tap.
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AndreyV (2009-01-22 22:02) [17]
> [12] Virgo_Style © (22.01.09 21:45) > In principle, what to suspect here - just visually > imagine the flow of 14 l/c from the tap, and all suspicions will disappear > themselves %-))
Hydrant with boiling water.
> And even more interesting would be to calculate the heat exchange “source > heat-wall-water”, there should also be some interesting numbers %-) Well, here you can make a lot of thin tubes.
Here the gas consumption at 28-46 MJ/m3 (from Wikipedia) turns out to be 0.5 m3/s or something.
Is this a lot? I guess it's yes. This is where the gas goes. Where should I put the hot water? ← →
Correct$Vasya (2009-01-22 22:20) [18]
> water has two parallel paths, one through the column, and the other > directly. The water will flow directly.
it will go here and there and the pressure will divide
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AndreyV (2009-01-22 22:32) [19]
> [18] Correct$Vasya (22.01.09 22:20) > she will go both there and there > and the pressure will divide
Naturally.
Otherwise, you can say the opposite: hot water will go into a cold pipeline. ← →
The corpse of Vasya Dobroy (2009-01-22 23:53) [20]
> it will go both ways > and the pressure will divide
If the water pressure is good, the column will work normally.
Our water pumping is weak, and you can safely forget about turning on the cold water. The gas goes out immediately. And it’s good if it’s complete. So I regulate the water temperature with the gas supply lever. ← →
Oak (2009-01-23 06:53) [21]
> Andy BitOff © (22.01.09 21:57) [14] > > Virgo_Style © (22.01.09 20:37) [9] > > Of course a typo =) Per minute =)
How much does it heat up? Because the calculations included a delta of 100 degrees. With it, it turns out to be 100 kW, which is also not weak.
> If the water pressure is good,
How much is good? In our system the cold is at a level of about 2.5-3 atmospheres.
But I still use the accumulative one.
And gas is a luxury of the tortured dominions. ← →
YurikGL (2009-01-23 07:24) [22]
> it will go both ways > and the pressure will divide
You have two pipes with a diameter of 2 cm, which bifurcates into a pipe of 2 cm (direct flow) and a pipe of 0.5 cm (column), and then the two pipes are connected and there is an outlet tap with a diameter of 1 cm. The question is, how much will pass through the column?
With very open cold water, zero will pass through the column. ← →
Andy BitOff (2009-01-23 09:11) [23]
> Oak © (23.01.09 06:53) [21] > How much does it heat up?
Well, buddy =) it's so simple (with the help of Google).
Maximum thermal power, kW 28 Min.
water pressure, atm 0.1 Max. water pressure, atm 10 Heating capacity, kW 24 Water consumption when heating at 40 °C, l/min 8 Water consumption when heating at 25 °C, l/min 14 Continuous time. work (50l cylinder, liquefied gas) 10 hours Gas pressure, Pa - natural 1274 -1960 - liquefied 2940 Efficiency 87% Gas flow, m3/h - natural 2.8 - liquefied 0.93 Weight, kg 13 Burner modulation Ignition - electronic automatic Necessity of a chimney required for hood Draft sensor yes Thermostat no Dimensions: width 350 height 650 depth 240 Option natural gas - yes liquefied - yes https://www.mnogobt.ru/md17t=920&alias=d:12
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KilkennyCat (2009-01- 23 09:21) [24]
> YurikGL © (22.01.09 21:58) [15]
You're almost right. This situation is only possible if the column is faulty. The valve of a working column opens only when there is a pressure difference. No difference - no discovery.
Well, you can “overwhelm” it with counter pressure only if the cold water pressure is very high, and the diameter of the mixer is very small and is plugged with your finger
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Oak (2009-01-23 09:23) [25]
>Maximum thermal power, kW 28
Wow.
So, this one - I also get gas. I want to heat myself with gas, like in Europe. Damn, when they carry out the infection... We’ll start a small war, maybe then we’ll go with the Chechen and Ossetian priority?
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KilkennyCat (2009-01-23 09:25) [26]
> Oak ©
How much will you pay the mercenaries?
Otherwise I’m ready to earn some extra money... ← →
Oak (2009-01-23 09:39) [27]
>KilkennyCat © (23.01.09 09:25) [26]
Shhh. Big brother is watching you. Well, not in an open forum? I just... just... clanged into nowhere.
In a whisper, holding lists and a pencil: You once said that you were ready for a place to spend the night and some food.
Is this valid? ← →
KilkennyCat (2009-01-23 09:42) [28]
> Is this valid?
Certainly.
Well, a small amount for leave, drink vodka there, talk to a girl... in general, 100 rubles a week is enough. ← →
Correct$Vasya (2009-01-23 11:30) [29]
> YurikGL © (23.01.09 07:24) [22]
the author began to fantasize about no diameters, no “very open” ones, my pipe diameters were the same
and in general, when the diameter decreases, the flow speed simply increases
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Anatoly Podgoretsky (2009-01-23 11:44) [30]
What does Ukraine have to do with it?
It seems that we have agreed. ← →
The corpse of Vasya Dobroy (2009-01-23 11:57) [31]
> and in general, as the diameter decreases, the flow speed simply increases >
But here Comrade Bernouli will not agree with you, because with increasing speed (decreasing the diameter of the pipe), the pressure drops.
The thicker the pipe, the greater the pressure in it. ← →
Correct$Vasya (2009-01-23 12:31) [32]
> But here Comrade Bernouli will disagree with you
If such a drinking party has already begun, then clarify what pressure is being discussed in the thread and in the description of the operation of the valve?
otherwise, according to Bernoulli's law, the total pressure in a steady flow of liquid remains constant along this flow. Total pressure consists of gravity, static and dynamic pressure. From Bernoulli's law it follows that as the flow cross-section decreases, due to an increase in speed, that is, dynamic pressure, the static pressure drops. https://dic.academic.ru/dic.nsf/ruwiki/59128 ← →
YurikGL (2009-01-23 12:43) [33]
> Correct$Vasya (23.01.09 11:30) [29]
It doesn’t change the essence... see [15] In any case, mixing it up is at least not advisable.
