Green Building Design
Today's Design Engineers are tasked with many requirements in regards to Green Building design and to meet varying levels of LEED certification. Canariis Corporation has assisted in the design of thousands of systems so we are well prepared to assist during this process. Every system is custom designed and manufactured to fulfill your specific needs.
Some items to consider for the efficient design of your domestic water booster system or HVAC pumping system are as follows:
DOMESTIC WATER BOOSTER SYSTEMS
A variable speed system is designed to modulate the pump speed in accordance with demand; the subsequent reduction in pump speed can result in significant energy savings.
The plumbing system designer must consider many "moving targets" in his design such as:
1. Suction pressure - present and future and the possibility of significant variances (20 PSIG & greater) due to losses in the meter and back flow preventer at high capacities.
2. Estimating the demand curve [load vs. time].
3. The final as built piping system as compared to the original design of the piping.
4. Special requirements such as air conditioning equipment, process equipment, boiler makeup etc.
5. The building dynamics - i.e. present use and occupancy vs. future use - as an example an office complex that converts to high-density executive rental suites or a condo that converts to a hotel. Densely populated buildings use more water even though the fixture unit count can be the same as less populated buildings.
All of the above can result in a system significantly different than anticipated, and on this basis the standard practice is to over design. It is generally accepted that Hunter's curve (used for calculating peak capacity in GPM) is very conservative, however this continues to be the basis of most designs. The above issues usually result in an oversized system and corresponding oversized pumps and motors thereby wasting energy for the life of the system (usually 20 years).
A variable speed system designed to the same system capacity and pump differential pressure as a constant speed system will adjust to the variable parameters and operate at the most efficient point and speed, which can provide very impressive savings.
Optimizing the efficiency of a building cooling or heating system is an important part of every design. By properly selecting a packaged system, the overall efficiency can be significantly improved over a field erected system.
Canariis can assist during the design process to properly address the system efficiency while staying within budget and spacial constraints. Some items that will be considered during this process are:
- Equipment selection
- Equipment sequencing
- Piping design
- Load Profile
- System Curve
After design and production of the system, the equipment must be tested at the factory to verify performance and to optimize the operational efficiency of the equipment. In the below test data, a Canariis package provided an increase in efficiency of over 17% in comparison to a field assembled system. Please feel free to contact our designers to discuss how you can optimize your package efficiency.