It could make engineering simpler if all the water flowed at the same speed.
It isn’t.
The amount of wastewater that flows into a household water system may fluctuate throughout the day. Industrial and commercial facilities could be experiencing operating peaks. Stormwater can change dramatically with weather conditions. The need for clean water is also different dependent on the purpose for which it is used.
When designing an efficient pumping station, it’s not only a matter of selecting the equipment that can be able to handle a particular flow. Engineers must know the possibilities of the conditions in which the system could be utilized.
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Take into consideration the operating conditions and not just the Maximum Capacity
It is obvious that maximum flow is an essential element however it is only a part of the operation of an installation. Imagine a system for wastewater which is designed for high peak-flow. Most of the time, the incoming flow is lower. However, the station has to perform as it should during normal timeframes.
This raises questions about wet-well dimensions the pump’s operation and controls Head conditions and how equipment will respond to the changing demands.
A properly engineered package pumping system brings these considerations together around the actual requirements of the site instead of treating maximum pump capacity as the entire design objective.
The daily rhythm of wastewater
In the life-cycle of an wastewater lift station the conditions of the influent can change.
The system has to collect the wastewater and turn on its pumps according to the plan of control that is set by the station. The dimensions of the structural components, the pumping equipment, piping and pumps as well as electrical parts and controls, all play an important role in this process.
Other site-specific considerations may also enter the design. Romtec Utilities is able to incorporate auxiliary equipment such as grinder vaults or odor-control equipment, depending on the particular application. The result is a station that is designed specifically for the specific project rather than being a general design that can be applicable to all wastewater sites.
Stormwater can change much faster
Stormwater is a different operation. A stormwater lift-station may be relatively quiet during dry conditions, and then encounter an influx that is significantly greater during a weather event. It could be part of a larger flood-control or detention, treatment or drainage strategy, which makes the plan for stormwater management surrounding it an essential element of the system design.
Romtec Utilities evaluates factors including needed flow rates as well as head conditions, size of the system, site requirements, and environmental aspects when developing these systems.
Stations that serve commercial developments could look very different than those intended to serve municipal stormwater needs.
Head Conditions Matter Along With Flow
Moving 1,000 gallons of water is only part of the engineering issue. Engineers must also know where the water is headed and what kind of resistance the pumping system will have to overcome.
Pumps can operate with different head sizes based on the system’s configuration, including the piping or discharge conditions.
The connection between flow rate and head is that deciding on a motor solely on its capacity will not suffice. The design and technology of the pump must meet the hydraulic demands of the application.
Plan for the Conditions that the Station Will Actually Experience
Romtec Utilities designs and develops custom pumping systems to meet the demands of wastewater, stormwater management and clean water, industrial applications, boosters and many more. The process involves preliminary design budgeting, planning sets, budgeting, system supplies, documentation, testing and startup.
The premise behind the design is straightforward pumps don’t need to be able to operate for their entire life under a single set of conditions.
They encounter changes in flows, needs, and specific project-specific hydraulic requirements. It is important to design a station that can handle this reality.