Month: February 2017
When specifying a compressed air system for optimum operation and energy efficiency, proper selection of the compressed air receiver tank(s) is one of the most critical decisions one can make. There are several different “rules of thumb” and formulas that will assist you, but finding straightforward guidance that says “use this size air receiver” is difficult if not non-existent.
Air receivers can be used in several different ways in a compressed air system:
- “Primary” receiver between the supply side (air compressor and ancillary equipment), and the demand side (your plant). Today’s air compressor controls (on/ off-line, modulation, and variable frequency) strive to maximize energy efficiency and smooth compressor operation by responding to demand side pressure changes sensed at the discharge of the package.
A properly sized air receiver acts as a “buffer” and minimizes the effect of dynamic demand side pressure changes, allowing the compressor controls to operate smoothly and consistently. The end result is less energy used, longer component life, and consistency in plant air pressure.
- “Secondary” receiver typically on the demand side, at the point of use to minimize the effect large intermittent air demands have on the overall compressed air system.
Sizing a PRIMARY receiver for general FIXED SPEED APPLICATIONS:
- The air compressor industry has widely accepted the general rule of thumb that a properly sized air receiver for a fixed speed compressor should be between 1-2 gallons per CFM output of the compressor.
Example: A 100 CFM fixed speed air compressor should have an air receiver between 100-200 gallons sitting next to it. Err on the high side if your budget permits.
Sizing a PRIMARY receiver for general VARIABLE SPEED APPLICATIONS:
- When considering air receiver sizing on a variable speed drive application, the general rule of thumb is between 2-4 gallons per CFM output of the compressor.
Example: a 100 CFM variable speed air compressor should have an air receiver between 200-400 gallons sitting next to it. Err on the high side if your budget permits.
Useful Air Receiver Sizing Formulas (Primary and Secondary):
Use this formula when you have an existing air receiver
and need to know how long you can draw CFM greater than the output of the air compressor, from the receiver, while still maintaining system pressure:
- T = R x P1 – P2 Qr – Qc 7
Use this formula to determine what receiver size to use to supply pressure for a given period of time, not allowing the system to drop below a minimum pressure. The demand of air is greater than the CFM output of the air compressor:
- R = 7 x (Qr – Qc) x T
P1 – P2
Use this formula to determine how long it will take to recharge an air receiver to P1, after demand goes back to being below CFM output of the air compressor:
- T = R x (P2 – P1)
Qr – Qc x 14.7
T = Time in minutes
R = Receiver in cubic feet Qr = CFM removed
Qc = Compressor output in CFM
P1 = Maximum air receiver pressure P2 = Minimum air receiver pressure
14.7 = Atmospheric pressure in PSI (sea level)
CUBIC FT to GALLON CONVERSION: 7.48 gallons in a cubic foot
Why the FS-Connect Piping System?
Do you have problems with the pressure, flow or quality of your air that is affecting your products, increasing your scrap rate due to rejections in quality, efficiency, tooling costs due to increased maintenance or spraying applications like paint jobs? Then you may want to review your compressed air piping system for a start in enhancing your operation and savings.
What You Need to Consider When Selecting Piping?
- Know your installation & ambient conditions.
Consider the environment the piping system will be installed in. There are many elements that can induce corrosion. Some harsh chemicals or fumes could have an adverse effect on the pipe. Installation conditions could play a role in the effectiveness of your system and life cycle of the pipe.
- Know your flow, the temperature and the pressure min and max requirements.
For safety and overall performance, the flow, the temperature and the pressure should be reviewed and discussed thoroughly before a choice of pipe is made.
- Review the budget and plan for possible expansion in the future.
All pipe options have different price points, different installation requirements and options for future expansion. It’s best to consider all of these factors before choosing the product that will be best for your installation.
The benefit of the FS-Connect Piping System (aluminum) is ease of installation at an extremely competitive cost advantage when compared to traditional piping systems. Our system offers non-plastic fittings for durability and many different mounting brackets to handle all the installation requirements for any location. The FS-Connect Piping is simple, cost-effective and will impact your compressed air system and bottom-line in a positive manner.
As with anything there are always many ways to accomplish the same end result, just with differing energy, thought and cost to get that same end result. If you can have the best quality of air with the least amount of headaches and least amount of waste in terms of production and maintenance for the least cost, wouldn’t you choose that solution? If you are interested in savings and ease of mind the FS-Connect Piping System offers the most flexibility for design and install over all of the other technologies. No sweating is required as with copper piping, no threading, pipe dope and labor intensive cutting and hanging as with the black malleable piping. The copper and black pipe is very heavy and cumbersome to handle making for costly, labor eating installations. The shipping and handling that is involved in the traditional pipe drives the costs even higher. These other technologies also need the special tooling required for the projects. Aside from the installation drawbacks of black pipe and copper pipe one must also be aware of the corrosion that starts attacking these piping materials from the onset. Copper is not nearly as bad from a corrosion point compared to black iron piping, however copper still corrodes over time and does have the high cost factor for installations due to the rising price of copper and labor to sweat.
The Benefits of Using FS-Connect Piping System
The FS-Curtis Aluminum Piping System’s benefits include:
• Energy efficient
• Lower installation costs
• Push-to-connect technology
• Immediate pressurization
• Removable and reusable
• Modular design
• No corrosion
• Leak-free guarantee
• Full bore design
• 1/2" - 6" pipe sizes