Steam Basics Part 3: Why Use Low Steam Pressure

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Steam Basics Part 3: Why Use Low Steam Pressure

Why do you tend to use low-pressure steam in HVAC and domestic water heat exchanger selections? When selecting a heat exchanger, the diameter is determined by the design flow rate and ... 

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Steam Basics Part 1: Understanding Steam and Steam Heat Exchangers

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Steam Basics Part 1: Understanding Steam and Steam Heat Exchangers

Steam heating systems are a bit of a mystery for many engineers and contractors. Much of the “old school” knowledge on steam heat exchangers retired years ago. With the limited number of new steam systems being installed today, this subject is rarely covered with any detail. Most healthcare facilities and some industrial facilities use ...

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Humidification Basics Part 9: Importance of Water Quality and Type

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Humidification Basics Part 9: Importance of Water Quality and Type

Water quality is an important concern when it comes to humidification. Regardless of what type of humidification you are using (isothermal or adiabatic), chances are you will need to add some degree of ...

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Condensing Boiler Plant Piping Design & Control Part 7: Calculating Boiler Cycle Time

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How long should a boiler run before it cycles off? And how long should it stay off before it cycles back on? The answers to these questions will of course vary from system to system. As a general rule, the combination of boiler run time and off time should never be any less than 10 minutes. Under normal operating conditions, the run time will always be dictated by two factors....
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Condensing Boiler Plant Piping Design & Control Part 6: Boiler Cycling and Supply Delta T

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Identifying the stop and start range of a boiler system is a critical first step in controlling boiler staging and/or sequencing. This range defines what the boiler supply temperature is at full fire and what the supply temperature is at no fire. It is commonly referred to as the boiler supply Delta T.
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