normal temperature of boiler

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Reasons for Increasing Exhaust Gas Temperature of Boiler

Under normal conditions, with the increase of excess air coefficient at the furnace outlet, the exhaust gas temperature will rise. With the increase of excess air coefficient, the increase of flue gas volume, flue gas velocity and convective heat release is less than that of flue gas volume.

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Reasons for Increasing Exhaust Gas Temperature of Boiler

The heat loss of exhaust gas is the biggest one of all the heat losses of boiler. Generally the loss heat is 6% of the heat input into the boiler furnace. The heat loss of exhaust gas increases by 0.5% when the temperature of exhaust gas increases 12-15%. Therefore, exhaust gas temperature is one of the most important indicators of boiler operation.

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What temp do you run your boiler at? - MoneySavingExpert.com

It's a 12kW output boiler. On a mild day it runs at 100% for 30 minutes to get the house to around 18 degrees (from a cool 12 degrees). Then it runs at about 25% (using 3kW) until I turn it off. That maintains the temperature at 18 (assuming outside temperature is not too cold at about 5).

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Flue Gas Temperature and Heat in the Flue Gas Flow (Btu/hour

Flue Gas Temperature and Heat in the Flue Gas Flow (Btu/hour) [ back to full computer program list] This computer program calculates the specific heat (Btu/lb-F) and the enthalpy (Btu/lb) for typical gases found in the flue gas of combustion systems.

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What Temperature Should I Set My Boiler At? - YouTube

Feb 04, 2015 · http://www.oxyvent.com/ Watch this video to see how you can reduce your boiler temperature to save fuel. Keep you boiler condensing constantly.

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Boiler Temperature - an overview | ScienceDirect Topics

The system was tested with boiler temperature from 100 to 110°C, condensing temperature from 35 to 41°C, and evaporating temperature up to 12°C. Two different mixing chambers were investigated. Choking of the fluid was always found in the first mixing chamber, but not in the second one.

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High Pressure Boiler Inspection Procedures (with Checklist)

Jul 02, 2019 · A high-pressure boiler is defined as a boiler in which steam or vapor is generated at a pressure equal to or greater than 15 psig, or a boiler in which water is heated at a temperature of 250°F and a pressure greater than 160 psig, when water is heated for use external to the boiler itself.

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What temp should I set the CH on our condensing boiler

Jan 08, 2010 · What is the "maximum rated temperature of the CH system"? Radiators outputs are stated for a flow temp of 75C, return of 65C; but condensing boiler can be run at any temperature, e g flow of 60C, return of 40C. So, if you design a system for those temperatures and size the radiators accordingly, are you still expected to run the boiler at 80C?

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Condensate Return | CleanBoiler.org - Boiler Consortium

Introduction. The value of the condensate varies with its pressure and temperature which depends on the operating pressure of the steam system. If boiler feedwater is 60F, and the condensate is 212F, then each pound of condensate contains at least 162 BTUs (212 – 60 = 152); if the boiler is operating at 80% efficiency,

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Your combi boiler’s ideal temperature for central heating

At ProTech Boilers, we recommend setting your room thermostat at between 18 and 21 degrees Centigrade to optimise your boiler’s performance. Studies have found that this is the most comfortable interior temperature range for the majority of people surveyed. For older or less mobile people, between 22 and 23 degrees is a better temperature.

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Stack Temperature and Burning Efficiency | Hearth.com Forums Home

Jan 15, 2012 · I must say that his flues have not been cleaned since I put his Garn in 3-1/2 seasons ago so alittle more drop than that would be normal in a clean boiler. At the 500* on the Garn thermometer you would probably drop over 100* in the last pass because you have more heat available than if you were reading in the 350 range.

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FAQs | Weil-McLain Boilers & Products

The average setting for the aquastat (the temperature control device on a boiler) for a forced hot water system is 180°F. It can be raised as high as 210°F if needed in severe weather. For systems that use coils to heat domestic hot water, the high limit setting is 210°F and the low limit setting 140°F.

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Combustion Testing - Engineering ToolBox

Stack Temperature The "net stack temperature" is the difference between the flue gas inside the chimney and the room temperature outside the burner. Net stack temperatures above 700 o F (370 o C) are in general to high. Typical values are between 330 - 500 o F (160 - 260 o C).

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"Normal" Temperature for Hot Water | DIYnot Forums

The 'best' range for hot water temperature is quite narrow: it should be ABOVE the maximum temperature that can allow Legionella and other bacteria to grow (50 degrees or so) and BELOW scalding temperature (actually less than 55, according to the rules governing Care Homes, etc.!).

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Water temperature requirement for hot water baseboard? | This

Dec 23, 2010 · The dew point which in our world generally starts when we can get return water temperatures back to our condensing boiler at 134 degrees. This begins the high efficiency range of condensing boilers and gets you in the 90% AFUE. Now back to the baseboard. Lets take a heat loss of a room that is 20x20 or 400sqft.

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HOT WATER BOILER SYSTEMS Medium & High Temperature

HOT WATER BOILER SYSTEMS Medium & High Temperature Temperatures to 400°F. Pressures to 300 PSI "Never a Compromise for Quality or Safety" tically reduced costs, from labor savings by the elimination of water softening, blowdowns, and boiler water treatment; (5) Boiler atten-dants are normally not required and the system can remain in opera-

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Temperature of steam versus water in a boiler

Oct 16, 2009 · It is because water for brewing should be around 200 degrees F. If you heated the steam boiler to 200 degrees F the pressure would be pretty low. Not enough to push the water through the coffee in 25 seconds. If a pump is used then the system must be incompressible so the force exerted by the pump acts on the top of the coffee.

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Advice on Boiler Temperature Settings – Combico Heating

Oct 12, 2015 · Advice on Boiler Temperature Settings. For a modern condensing boiler, the return flow to the boiler must be below 55 degrees C for heat recovery by condensation to take place. If the return temperature exceeds this, the whole purpose behind installing a condensing boiler, and the benefit of reclaiming latent heat from the flue gases,

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Setting of boiler temperature | PlumbersForums.net

Nov 08, 2016 · # The boiler thermostat is set to achieve a water temp should be set to 75C # The temperature difference between flow and return pipes does not exceed 13 C

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Winter Operation of Steam and Hot Water Heating Boilers

Winter Operation of Steam and Hot Water Heating Boilers 2 of 4 have dropped to levels significantly less than the system as a whole, and especially the water actually in the boiler. A consequence of this can be (relatively) cold water coming in contact with the hot boiler metal. In extreme cases, the resulting

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What is the correct temp setting for a hot water boiler

Comments. Water from the boiler is injected into the radiator circuit at a rate designed to precisely maintain the radiator temperature relative to the outdoors. It can vary from 70 degrees (room temperature) up to 180F if you need it. The boiler is maintained at a different scale, the 180 to 140 range because you have to.

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What is the temperature of a boiler in a power plant? - Quora

Jan 15, 2017 · Answer Wiki. Temperature inside boiler (furnace) is around 1100 deg to 1200 deg. Although it is favorable to keep it under 1100 deg or otherwise ash in flue gas will melt as forming clinkers and it will stick to to boiler walls. I am talking about big boilers of 800MW (super critical) capacity. Output main steam temperature ranges from 550 to 570 deg.

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Boiler and Condenser Pressures - Rankine Cycle

Boiler and Condenser Pressures. As in the Carnot, Otto and Brayton cycle, the thermal efficiency tends to increase as the average temperature at which energy is added by heat transfer increases and/or the average temperature at which energy is rejected decreases. This is the common feature of all thermodynamic cycles.

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What's the Best Temperature for My Water Heater? - Lifehacker

Guidelines from the department explain that most hot water heaters are automatically set to 140 degrees Fahrenheit, but that’s usually unnecessary. Not only will setting it to 120 degrees meet most

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Ideal water temperature for baseboard heat

Ideal water temperature for baseboard heat. If you're running 140F water out with a 25F delta-T, the return water is ~115F and you're into the mid-90s for raw combustion efficiency, roughly 8-10% better than you're getting with 130F return water with only a 15F drop in temp. Below ~120F the output curve of fin tube is non-linear

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How to Set Hot Water or Steam Heating System Pressure

Typical operating temperature settings on a boiler call for a Low temperature (boiler cut-in) between 120 and 160 °F. Typical operating temperatures on a hydronic boiler call for a high temperature (boiler cuts off) of 180-200 °F.

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BOILER EFFICIENCY GUIDE

A 4-pass design provides four opportunities for heat transfer. The stack temperature of a 4-pass boiler will be lower than the stack temperature of a 2 or 3-pass boiler, of the same basic design, operating under similar conditions. Because of this fact, the 4- pass will have higher efficiency and lower fuel cost.

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Boiler central heating advice: What temperature should a

Mar 01, 2018 · The ideal temperature for your house is 21 degrees Celsius, according to a government study. However, the average temperature of a UK home is set to be 17.7 degrees Celsius, which is considerably colder. However, there is no hard and fast rule as to what temperature a house should be. Related articles.

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Steam and high temperature hot water boilers

Steam and high temperature hot water boilers 8 When operated correctly, all modern boilers are capable of achieving an efficiency of around 80% (based on the gross calorific value of the fuel). If they do not, action should be taken to achieve at least this level of performance. Higher efficiencies (of up to 85%) are possible for condensing gas

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High-pressure steam locomotive - Wikipedia

A high-pressure steam locomotive is a steam locomotive with a boiler that operates at pressures well above what would be considered normal. In the later years of steam, boiler pressures were typically 200 to 250 psi (1.38 to 1.72 MPa). High-pressure locomotives can be considered to start at 350 psi (2.41 MPa), when special construction techniques become necessary, but some had boilers that operated at over 1,500 psi (10.34 MPa).

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Boiler Combustion | CleanBoiler.org

Selective non-catalytic reduction involves the injection of a NOx reducing agent, such as ammonia or urea, into the boiler exhaust gases at a temperature of approximately 1400-1600°F. The ammonia or urea breaks down the NOx in the exhaust gases into water and atmospheric nitrogen.

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The Normal PSI Reading for a Hot Water Boiler System | Hunker

The high-limit temperature setting should be around 190 degrees and the standard hot water operating pressure around 20 psi.

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Boiler central heating advice: What temperature should a

Mar 01, 2018 · Your boiler will be working overtime during the winter chill, but what temperature should you set your central heating to when it’s cold? The ideal temperature for your house is 21 degrees Celsius,

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How hot should my water and radiators be ? | AVForums

Jan 27, 2009 · Now on the boiler we can set the temp of water to rads from between 38 and 82 degrees. I get confused as to how high it should be set and also if there is a optimum setting regards getting the most value for money (gas bill wise) out of the heating. The thing with the tap water is fine and easy to work out.

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The Temperature in Your Boiler and the Dangers of Overheating

The average setting for a gas-powered hot water boiler is 180°F. This provides the appropriate level needed for most cold weather temperatures. If you can raise the temperature manually, do not set it any higher than 210°F (which is often the limit), and try to remain down at 190°F if you need the extra heat.

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What temp should my boiler be set at - Oxyvent

There seem to be a lot of confusion about what temperature should my boiler be set at. The correct temperature setting for a boiler with the Oxyvent Tank is 60°C. We supply a Clip on Pipe Thermometer with the Oxyvent Tank to remind the customer to keep the boiler set at 60°C so that their system will continue to operate efficiently.

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Consulting - Specifying Engineer | Boiler systems: Economics

Jun 19, 2012 · As shown in Figure 1, with a system return water temperature of 130 F, condensing boilers are approximately 87% efficient, but this efficiency can go as high as 98%, with a return water temperature of 60 F.

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Most Economic Boiler Temperature? | Screwfix Community Forum

Oct 17, 2014 · I take it that means that maximum temperature of the boiler is 90c. The only reason I can see not to run the system at 90c is if there are any young kids around who might burn themselves. Stuart

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Boiler (power generation) - Wikipedia

His boilers worked at 40–50 psi (276–345 kPa) and were at first of hemispherical then cylindrical form. From 1804 onwards Trevithick produced a small two-pass or return flue boiler for semi-portable and locomotive engines.

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Getting the Most Out of Your Commercial Condensing Boiler

Apr 11, 2012 · Commercial Condensing Boiler Operation. By allowing the temperature of the return water to go below roughly 130° F this causes moisture to condense out of the flue gas. That moisture is vapor before it condenses and by turning a vapor into a liquid, useful energy (heat) is given up in the process.

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