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### How does one calculate boiler efficiency? - Quora

This answer assumes that you have enough instrumentation around the boiler to do all the calculations. Heat input: fuel flow rate and heating value (use LHV) Heat recovered: steam flow rate, pressure and temperature leaving the superheater, and enLearn More

### The problem of applying of the system of reverse osmosis

The higher the salt content of feed water, the higher the value of continuous purging of steam boilers and the higher the gas overspend. Since reverse osmosis desalts water, the value of continuous purging, as a rule, is lower than 1% of the boiler's steam capacity and, accordingly, can be provided by periodic purging of the steam boiler.Learn More

### Steam Calculators: Boiler Calculator

Mar 17, 2015 · Mar 17, 2015 · Using the calculated feedwater mass flow and blowdown rate: Blowdown Mass Flow = Feedwater Mass Flow * Blowdown Rate. [ Blowdown Mass Flow = 2.1 klb/hr = 52.2 klb/hr * 0.04 ] Using the Steam Property Calculator, properties are determined using Steam Pressure and Quality = 0 (Saturated Liquid).Learn More

### CHAPTER 3 COMBUSTION CALCULATION

produce 1200 kg/hr of steam at 0.1 MPa and 150oC. The percent conversion of the propane is ; of the fuel burned, 90% reacts to form CO2 and the balance to form CO. The temperature of combustion air, fuel and water entering the boiler is assumed at 25oC. The flue gas leaves the boiler at 300oC (all the water formed will be vapour). In Learn More

### Boiler Questions and Answers regarding Your Boiler

Here is what you need to know to figure this one out. The size of your boiler (bhp) the fact that one bhp = 34.5 lbs./hr. and that one gallon of water weighs about 8.337 lbs. Take all of these facts and plug them into the following calculation: BHP (Boiler Horsepower) X 34.5 / 8.337 / 60 X 10 = gallons of water needed.Learn More

### Boiler Pipelines Steam Blowing Procedure: Why and How

May 19, 2010 · Any impurity being dislodged from the boiler or steam pipes during operation of the power plant can lead to a major damage in the turbine, and so the steam boiler and their associated pipes need to be cleaned before rolling the turbine for the fist time. After that the procedure is done regularly to keep the system clean. Steam blowing procedures are used to clean the boiler system and pipe lines.Learn More

### Boiler Pipelines Steam Blowing Procedure: Why and How

May 19, 2010 · Any impurity being dislodged from the boiler or steam pipes during operation of the power plant can lead to a major damage in the turbine, and so the steam boiler and their associated pipes need to be cleaned before rolling the turbine for the fist time. After that the procedure is done regularly to keep the system clean. Steam blowing procedures are used to clean the boiler system and pipe lines.Learn More

### Boiler Efficiency - an overview | ScienceDirect Topics

Computations were carried out for an assumed boiler efficiency of 80%, time constant of 1 minute, burner purge time of .5 minute, and damper delay time of .5 minute. Steady state cooling losses were estimated from measurements to be 1.5% and 0.5% of the …Learn More

### The monitoring of the water-chemical mode of low-pressure

The method contains the following steps. Boiler water from the continuous purge line of the steam boiler 1, passing the shut-off valve 2, enters the water-water refrigerator of the sample 3, in which the boiler water is cooled to 10-30°C by supplying cooling water.Learn More

### Blowdown in Boiler | Boiler Blowdown Calculation Formula

Blowdown in Boiler Definition. Blowdown in Boiler, Usually, water which is fed to the boiler contains high Total Dissolved Solids (TDS) content as well as other dissolved and undissolved solids in it. On heating water or converting water to steam, these dissolved solids do not evaporate and gets separated from water or steam and settled at the bottom of the shell.Learn More

### How to Destroy a Boiler -- Part 1

Purge, purge, purge! Low-Water Conditions The potential for severe and even catastrophic damage to a boiler as a result of low-water conditions is easy to imagine considering that furnace temperatures exceed 1,800°F, yet the strength of steel drops sharply at temperatures above 800°F.Learn More

### Minimize Boiler Short Cycling Losses

The post-purge performs a similar function. During purging, heat is removed from the boiler as the purged air is heated. Example A 1,500 hp (1 hp = 33,475 Btu/hr) boiler with a cycle efficiency of 72.7% (E 1) is replaced with a 600 hp boiler with a cycle efficiency of 78.8% (E 2). Calculate the annual cost savings. Fractional Fuel Savings = (1 Learn More

### Inert Gas Purging Requirement Calculation

boiler operating at a 4:1 turndown would have to run for a significantly shorter amount of time to produce the same amount of energy in steam or hot water to the system. The actual time that it would have to operate can be simply calculated by: 4 Full load * 10 Full load 1 * 4:1 Btu/hr t Btu/hr hr = Therefore: .4 or 24min 10 4*1 4:1 hr hr t = =Learn More

### How to Destroy a Boiler -- Part 1

Purge, purge, purge! Low-Water Conditions The potential for severe and even catastrophic damage to a boiler as a result of low-water conditions is easy to imagine considering that furnace temperatures exceed 1,800°F, yet the strength of steel drops sharply at temperatures above 800°F.Learn More

### Quantifying Savings From Improved Boiler Operation

accounts for purge and drift losses through the boiler transferred to the water/steam to the total fuel energy supplied. A method for calculating boiler efficiency from easily measured input variables is derived below. The minimum amount of air required for complete combustion is called the "stoichiometric" air. Learn More

### Boiler Efficiency - an overview | ScienceDirect Topics

Computations were carried out for an assumed boiler efficiency of 80%, time constant of 1 minute, burner purge time of .5 minute, and damper delay time of .5 minute. Steady state cooling losses were estimated from measurements to be 1.5% and 0.5% of the …Learn More

### Proper sizing of Boiler Feedwater System

One boiler horsepower = 34.5 lbs/hr of steam (or water) from and at 212o F. We also know that one-gallon of water weighs 8.37 lbs. To calculate the storage tank needed use the following formula: BHP X 34.5 ÷ 8.337 lbs ÷ 60 min. X 10 = minimum useable capacity in gallons. For example, if you have a 500 HP boiler the calculation will be as Learn More

### A Boiler: The Explosive Potential of a Bomb

It is because hot-water heaters are usually so reliable that many consider them benign. But consider this: If you could capture all the energy released when a 30-gallon home hot-water tank flashes into explosive failure at 332°F, you would have enough force to send the average car (weighing 2,500 pounds) to a height of nearly 125 feet – or more than the height of a 14-story apartment Learn More

### PROCESS DESIGN OF STEAM BOILERS (PROJECT …

pressure is required. l. Steam drum and boiler tube system maximum design temperature specified on data sheet, superheater design temperature per code. m. Total continuous and intermittent blowdowns shall not be more than allowable figure specified in the boiler data sheet of steam generated, Vendor to specify capacity at rating. n.Learn More

### Steam Calculators: Boiler Calculator

Mar 17, 2015 · Steam, Boiler, and Blowdown Pressure are the same. Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used. Blowdown Rate is the % of incoming feedwater mass flow rate that leaves the boiler as a saturated liquid at boiler pressure.Learn More

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