The construction would be simpler if water was flowing exactly at the same time.
It’s not.
The quality of water that is pumped into a residential system could vary over the course of the day. Commercial and industrial facilities might encounter peak operating times. Stormwater can change dramatically with the weather. Demand for clean-water can fluctuate depending on the application.
Image credit: romtecutilities.com
It’s not enough just to pick equipment that will meet a certain flow rate when designing an equipment pumping station. Engineers must understand the conditions that the system will be exposed to.
Be aware of operating conditions, Not Just Maximum Capacity
The greatest flow is vital but it’s only part of the station’s operation. Imagine a wastewater system that was designed for a high flow rate. In most cases the flows coming in can be significantly lower. In these times however, the station has to be operating properly.
This leads to questions on wet-well capacity, pump operation, controls, head conditions, and how the equipment performs as demand changes.
The design of a well engineered package pump system considers the needs of the location, rather than focusing on the maximal capacity of the pump.
The Everyday Routine of Wastewater
In the course of the lifecycle of an wastewater lift station conditions for the influent may change.
The system has to be able to collect water and operate its pumps in accordance with the established control plan by the station. Structural dimensions, pumping equipment, valves electrical components, piping and controls play a role in this process.
Other considerations specific to the site could affect the design. Romtec Utilities can incorporate auxiliary equipment such as grinder vaults, odor control equipment and so on in the event that they are required by the particular application. The result is a system engineered around the project rather than a generic setup that is applied to all wastewater sites.
Stormwater Changes Much More Rapidly
A stormwater lift station may see relatively little activity during dry conditions and then face substantially greater inflow during a weather event. It could be part of a larger flood-control or detention, treatment or drainage strategy, making the stormwater plan surrounding it an essential element of the system design.
Romtec Utilities takes into consideration things like the flow rate that is required and head conditions, the size of the system, requirements of site, and environmental issues in the design of these systems.
Stations serving commercial developments may appear very different from those intended for municipal stormwater use.
The Head Conditions are Important Along with Flow
The ability to move 1,000 gallons is just part of the engineering issue. Engineers also need to know where the water is headed and the resistance that the pumping system will have to overcome.
Pumps can operate at different levels of head based on the configuration of the system such as the piping or discharge conditions.
This relationship between flow and head is one reason that choosing a pump based on a capacity rating isn’t enough. The technology of the pump and station’s configuration have to be adjusted to the hydraulic requirements for the entire application.
Design to meet the conditions that the Station Will Actually Experience
Romtec Utilities develops customized pumping systems for stormwater, wastewater clean water boosters, industrial, and other purposes. The procedure may involve initial design and budgeting plans, complete sets of plans and system supplies, documentation as well as startup, testing and commissioning.
The principle behind the design is straightforward: pumping systems do not require a long time to work under the same set of conditions.
They face changing flows, changing demand and the specific requirements of each project. It is crucial to build a station that will cope with the challenges.