this data is required to make a preliminary selection. Required Data:
Enter Boiler Capacity: HP
Required Data You may enter your boiler capacity in Boiler Horse Power (HP), Boiler Pounds per Hour (PPH)
capacity, or BTU input per hour (BTUH). Firetube boilers are typically rated in HP while watertube
boilers are rated in PPH. Smaller commercial boilers rated in BTU input require the input to be entered
in million BTU per hour, for example a 1,500,000 btu/hr unit should be entered as 1.5 in the data entry area.
Economizer Inlet Water Temperature F: Required Data
Water inlet temperatures under 215 F will be considered non-deaerated - stainless
steel tube required and will be included. Note if the economizer is to be used for a process water
(non boiler feedwater) application you will have the opportunity below to enter a custom water flow rate.
Economizer Flue Gas Inlet Temperature F At High Fire: Required Data If you're not sure:
Firetube: If unknown assume 75 degrees above saturated steam temperature
Watertube: If unknown assume 150 degrees above saturated steam temperature
Click here for steam tables to see saturated steam temperatures
Optional Part-Load Gas Temperature Inputs Available Below in Optional Input Section.
Boiler Type the Economizer Will Be Installed On:
Required Data Any boiler with an atmospheric burner
Firetube Boiler (Scotch Marine)
Flex-tube Watertube Boiler
Industrial Watertube Boiler
This is very important as firetube boilers typically require a lower draft loss across the tube
bundle than an industrial watertube boiler. The AutoPick program needs to know what type of stack draft loss
to select the unit for. All Pre-Designed Economizer economizers are designed for boilers withe forced draft blowers only.
If you are an experienced boiler technician and understand the unique draft requirements of your
boiler you may select an alternative maximum draft loss with the AutoPick OFF selection below.
Unit Recovery Type - BASE, SUPER, MICRO, TOP:
Required Data MICRO - Economy Coiled Unit - Typically under 275 HP Only
BASE - Base Unit - Lowest Capital Cost Standard Pre-Designed Economizer
SUPER - High Recovery Unit - Higher Capital Cost Standard Pre-Designed Economizer
TOP - Very Large Boiler Pre-Designed Economizer
This provides the user an opportunity to select a unit configuration based
on desired recovery and capital expense. The AutoPick software is designed to automatically switch to a SUPER unit from a BASE unit if the energy recovery
is higher and there is no difference in price from the BASE model. We recommend looking at both a BASE
and a SUPER unit and comparing the additional recovery and unit cost to make the most
economical purchase decision.
If your application is too large for a conventional
BASE or SUPER unit the AutoPick software will
automatically switch to a TOP configuration. The TOP is the largest Pre-Designed Economizer available
and is designed primarily for larger industrial watertube boiler applications. A TOP cannot be manually selcted.
MICRO economy coiled economizer reflects a lowest dollar unit for applications typically to 275 HP.
If the MICRO unit is selected for a boiler too large the software will automatically
switch to a BASE unit and activate the AutoPick software. Since the coiled units do not feature replaceable
tubes as the standard Pre-Designed Economizer units as surfaces exposed to flue gas including the tubes, fins, baffles, and casing are manufactured out of stainless
steel as a standard to provide a maximum unit longevity. This is a very high quality unit for smaller installations.
If you require even high heat recovery you may select the Stack Economizers option in the Optial Input
End of required data requirements for typical Pre-Designed Economizer Applications. This is a minimum requirement,
final unit selection could be affected by other operational constraints. Additional data inputs are located below.
Pre-Designed Economizer reviews all selections for accuracy prior to placement of any purchase order.