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China Gas Information
"Gas boiler" is all plumbing system heat source focus. It's the job of the (zuo) reason and common "family gas water heater" similar, but only more power. Generally in 20 kw to 36 kw inequality. And "family gas water heater" power in the 16th kw mercy (" family gas kitchen burning gas "power in 4 kw mercy). Regardless of which kind of boiler are best applied natural gas (NG) as air, because, natural gas heating value for 8500 kilocalorie, far higher than the artificial coal gas calorific value of the 3500 kilocalorie.
"Gas boiler" since is the focus of all plumbing system, then, it is not out of the high energy consumption topic error plumbing for main obligation. Let's look at the hide in the "drum" behind the secret (mi) close is assorted (shen)?
Boiler thermal effect
All produce "gas boiler" manufacturers have claimed that its "steam boiler thermal effect arrived at more than 90%". So, are we should think: boiler the combustion of natural gas at least 90% were water receiving? Wrong! "Steam boiler thermal effect" is refers to the boiler will gas, natural gas and other converted into heat energy ability. Is also the boiler burning yourself plenty to. As for, the water in boiler heated exactly how many receives the boiler combustion heat energy, and "steam boiler thermal effect" have no complete coherent relationship.
chimney
As is known to all, the stove is a chimney. The higher the chimney, the furnace combustion is enough. But at the moment, all the "gas boiler" chimney to facilitate the installation and tasteful appearance, all the design only 1 meter length. This has caused a conflict: chimney short, boiler will be unable to less than sufficient combustion. A large amount of heat energy follow chimney is therefore arranged to the outdoor air. After field testing, Germany (Germany) a (zhu) the name brand of chimney of the outlet temperature of 120 ℃. Most of the "household gas boiler" outlet temperature is in 160 ℃ above, some even arrived at 200 ℃.
Minimum output power
All "household gas boiler" "technique parameter" list, all embody the "heating system maximum output power" and "minimum output power" value. So, what is the minimum output power "? Why do you want to have "minimum output power"? "Minimum output power" exactly "small" to what extent (du)?
"Minimum output power" is refers to, when boiler burning work, must reach the minimum amount of combustion. That is, when the heating area of the boiler output power to less than "minimum output power", boiler still with "minimum output power" in combustion. Of course, excess heat process through the chimney was booked into the air. In short, if 100 m2 room used only 10 m2 heating word, boiler still according to 50 m2 heating combustion quantity work.
Gas boiler "minimum output power" design is based on boiler application peace sex consider. Because, to the outdoor chimney once encounter strong outdoor airflow return air flow backward, very easy extinguish fire, caused extensive gas leakage divide. This kind of design of gas boiler, guaranteeing the all kinds of bad application cases, boiler can still perhaps is (zheng) often, peace work.
"Minimum output power" is generally "maximum output power" half.
DianMo above analysis, we know a a thing or two.
Boiler combustion energy = heating hot water energy + chimneys discharge energy.
Cooling system:
Gas boiler water heating system of cooling system there are two. A is the ground water coil, another kind is metope hanging heating unit. These two kinds of cooling ways are applied through the tube of hot water (65 ℃), through the process pipe wall and outside formation heat exchange. In order to add the cooling way cooling area, underground pipes and metope radiator are designed to multiple S type spiral structure. Is heating results speaking, groundwater coil of the cooling way is far better than radiator.
We know that the best floor heating mode is: human contact ground temperature (40 ℃) slightly above the body temperature, all circumstances temperature and make the person feels comfortable and not too hot (18 ℃ - 20 ℃). Due to the plumbing pipe is a kind of scale linear high temperature fever body, in order to fit all the ground heating request. Plumbing pipe have to through the process on the ground and back (q ū) to add the cooling area. The goal (di) is linear high temperature spawn facets of low temperature. The cooling mechanism changes is the loss of heat effect for price.
Control system:
Plumbing system control system by water segregator, electromagnetic valve and constitute the thermostat. Water segregator and electromagnetic valve is to users need to distinguish self holding some heating area and design. In a 100 m2 unit as an example, theoretically its heating simply from the drum pick out a root out of the water, in the interior finish coil, then back to the boiler can. But in reality, the pipe length, hydraulic pressure intensity (the longer, the more elbow pipes to the water pressure) and user career habit restriction, often need a few road coil with existence. Water segregator goal is from boiler derivate main hot water resolution into each coil system. For example, all the guest room, bedroom all the way, toilet all the way, etc. Electromagnetic valve goal is to receive the user in the room temperature controller on the control instruction, is responsible for the detection of active or open into each coil system of hot water. The water control system after practice inspection, there are many safe hidden trouble.
(1) the application of water segregator, adding to the system leakage probability. Due to the pipe joint added 5-6 times.
(2) system for parts with good sex on degree to add. Electromagnetic valve and the thermostat any parts of the fault, the city (hui) lead to all plumbing system error control. And electromagnetic valve and thermostat and just is the most easily the failure of the parts.
Installation:
Plumbing system installation quite time-consuming take a lot of work. Plumbing company in laid out water coil and control line, then inform mainfold factory and boiler factory to install water segregator and boiler. The thermostat installation, debugging system. General dispatch installation time is: pipe (line) 2 day, boiler 2 day, debugging 1 day (with 100 m2 unit as an example). These are not included in QianHouDao process for coordination, the additional installation time add.
System safe sex:
Plumbing system peace sex was also is all mining