supply air flow reheat coil kw boiler capacity gas consumption

Product thermal capacity: 4-35 t/h
Working pressure: 1.0-2.5 MPA
Outlet temperature:: 184-350 ℃
Available fuel: Bituminous coal, lean coal, anthracite
Available industries: Heating, chemical, food, tobacco, textile, print and dyeing, feed, medicine, building materials, wine, hospital

>Supply Air Temperature - an overview | ScienceDirect Topi

Supply Air Temperature - an overview | ScienceDirect Topics

If the thermostat is set for 72°F, and the room air is 70F, the thermostat will operate a valve at the local heating coil to allow hot water to flow and to “reheat” the air to some higher temperature until the room air (mixed) rises to 72°F, at which point the thermostat will control the heating coil valve to stop the flow …

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>Boiler Temp. for VAV Rehe

Boiler Temp. for VAV Reheat

Sep 21, 2005· A new school that was put into use this fall has a very strange problems. In the month of July they had a nat. gas bill for $17,000 dollars. All of the gas was used for heating water for reheat into the rooms thru VAV boxes. The Best I can tell from talking to the control co. , engineer and the general contractors engineer the cooling unit delivers a constant 55 deg. air all the time, if the

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Back to Basics Useful Equations when Sizing Coils with CoilP

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Back to Basics Useful Equations when Sizing Coils with CoilPro

Heating air with a steam coil or a hot water coil is an example of sensibly heating air. For sensible heating or cooling, the following equation holds true: Q = M * Cp * Delta T Where: Q = The amount of heat transferred to or from the fluid (BTU/hr) M = Mass flow rate of the fluid (lb/hr) Cp

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>Cooling and Heating Equations - Engineering ToolBox

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IMPORTANT COIL SELECTION PERFORMANCE FORMUL

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IMPORTANT COIL SELECTION PERFORMANCE FORMULAS

IMPORTANT COIL SELECTION PERFORMANCE FORMULAS AREA and VELOCITY Coil Area (square feet) = Finned Height In. × Finned Length In. ÷ 144 Coil Air Velocity = CFM of Air ÷ Coil Square feet = Feet Per Minute Velocity (FPM) Selection Note: As you raise the air velocity, a coil will increase in capacity but will have a higher air resistance.

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>Consulting - Specifying Engineer | How to design hi

Consulting - Specifying Engineer | How to design high

Oct 24, 2016· Due to the lessening of the approach, more coil surface area is required to obtain the same heating capacity versus when 180°F water is supplied to the reheat coil. To counteract this reduction in coil capacity, three-row coils may be required. Another potential solution is to upsize the terminal box to increase the coil surface area.

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Journal Reheat Article - Krueger-HV

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Journal Reheat Article - Krueger-HVAC

Overhead Heating: A lost art. March 2007 ASHRAE Journal Article Dan Int-Hout Chief Engineer, Krueger VAV terminals provide a measured quantity of conditioned air to a space, in response to a control signal from a thermostat or room sensor. This air may be tempered with a reheat coil, plenum air, or both. The

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Energy-Saving Strategies for Water-Source Heat-Pump Syste

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Energy-Saving Strategies for Water-Source Heat-Pump Systems

space, and then reheat it to approximately space temperature (neutral). However, when a chilled-water or DX cooling coil is used for dehumidification, a byproduct of that process is that the dry-bulb temperature of the air leaving the coil is colder than the space (Figure 6). If the dehumidified outdoor air (DH) is

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Air and Water Flowrate Optimisation for a Fan Coil Unit

File Size: 813KB [PDF]

Air and Water Flowrate Optimisation for a Fan Coil Unit in

the supplied capacity of the fan coil for a range of air and water flow rates. Over the fan coil capacity range, use of different fan speeds for different ranges results in the lowest total power consumption for that range. For a required cooling capacity below 1250 W, fan speed 1 resulted in the lowest overall power consumption, between 1250 and

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>Typical HVAC Rules of Thumb | Abraxas Energy Consulti

Typical HVAC Rules of Thumb | Abraxas Energy Consulting

Air Cooled Chillers: 1 kW/ton. Water Cooled Chillers: 0.6 kW/ton. Most Efficient Water Cooled Chillers: 0.35 kW/ton: Chillers & Pumps & Towers.9-1.0 kW/ton: Absorbers: 18 lbs steam/ton: Boiler Horsepower: 33,479 BTU/hr = 9.8 kW: Rebuilt Systems Design: 55°F supply air: 30°-40° rise reheat coils: Dual Duct & Multizone Design: 55° cold deck

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BOILER SELECTION CONSIDERATIONS - Cleaver-Broo

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BOILER SELECTION CONSIDERATIONS - Cleaver-Brooks

Boiler horsepower (BHP) is a measure of boiler energy output. One boiler horsepower (from and at 212 °F): † BHP = 34.5 lbs/hr † BHP = 33,472 Btu/hr † BHP = 9.8 kW † BHP should not be confused with other horsepower measurements. Boiler Trim: Accessories added to the boiler, such as auxiliary low water cutoff, special tappings, special gas

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Hot water:0.7-14 MW
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