5 Reasons Why Your Business Needs Automotive Electric Water Pump Manufacturer？

This article was originally published on AftermarketNews.com

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Many people are under the impression that electric vehicles don’t need cooling systems. And therefore don’t need water pumps. But, thankfully for the aftermarket industry, this isn’t true. Electric cars produce heat and still need a cooling system. That’s where the water pump comes in.

Why Most Electric Vehicles Use Liquid Cooling

EVs can be air-cooled, but most are not. Liquid cooling is much more efficient because it’s consistent, and this allows the cooled components to run closer to maximum output. Just like for vehicles with internal combustion (IC) engines, there are too many variables involved for air cooling to be efficient at all times. For instance, with air cooling, your electric vehicle has a higher chance of overheating components while traveling at a low speed on a hot day as opposed to traveling at a high speed on a cool day. Liquid cooling takes all these variables out of the equation and provides consistent cooling at all times. Also, the warm coolant can be used to provide cabin heat.

The Electrical Components That Need to be Cooled

Electric vehicles have several sources of heat. But, they don’t generate temperatures as high as an IC engine does. This causes the cooling system to be designed differently. Some EV’s use two completely separate cooling circuits, each with their own water pump. Exactly what components are cooled will vary by manufacturer. But generally, these items are cooled:

• Electric motor(s)
• Battery
• Inverter
• DC – DC Converter

How a Water Pump Functions in an Electric Vehicle

An electric water pump is powered by the vehicle’s electrical system. There can be up to two or three  water pumps in an EV. The ECU turns them on only when their circuit needs cooling. That way, the system has more targeted cooling, which helps reduce the load on the battery. Additionally, some vehicles also have a water pump just to provide cabin heat.

The Main Differences Between EV Water Pumps and Regular Water Pumps

Both types of water pumps circulate coolant. But there are still a few notable differences between the two:

Choosing the right pump for dewatering applications is crucial to ensure maximum performance and cost effectiveness. There are two broad categories of pumps: diesel driven pumps and electric submersible pumps. While there may be a need for both types of pumps, it is important to determine which pump type is suitable for the particular application.  

Typically, dewatering is the first undertaking on a construction jobsite. There are circumstances when a diesel pump would make the most sense, particularly when there is no electricity and a generator is unavailable. However, with environmental regulations and the rising cost of diesel fuel, the industry has seen a shift to electric submersible pumps in the recent decades. Electric submersible pumps have numerous advantages over fuel and diesel-driven pumps, making them the top choice for construction, mining and utility projects.   

5 reasons electric pumps are contractors’ first choice 

1. Continuous work

If there is a need for a pump to operate continuously on the jobsite, electric pumps might be the most reasonable option. They can work continuously without damage or failure, as long as they can stay plugged in to a stable, continuous power supply. Typically, electric pumps are the first choice for any dewatering application or industrial process that needs to pump liquid for more than 20 minutes per cycle, as diesel pumps require maintenance more frequently. Diesel or gas-engine pumps demand several interruptions for refueling, which ultimately delays the work and increases the final cost. In many cases, a technician is required to watch the working pump 24 hours a day per specific local government, Occupation Safety and Health Administration (OSHA) and labor union regulations.  

2. High altitude  

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Many people are not aware of this issue, but altitude can affect gas and diesel engine pumps’ performance. That is because the higher the altitude, the lower the pressure, which can make it harder for pumps to do their jobs with the same efficiency as at sea level. For example, an engine pump in Denver, Colorado, with an elevation of 5,280 ft, will see suction lift reduced by 30%. To make it easier to understand: a pump rated with 10 ft suction power at sea level will provide only 7 ft suction lift at 5,280 ft altitude.   

In addition, as the oxygen thins out and becomes less dense, gas and diesel engines require a wider throttle opening to pull in adequate amounts of air, which in turn means more fuel being burned, which increases costs. High altitudes or atmospheric pressure does not affect electric pumps – they can operate at full capacity and deliver great performance while eliminating additional fuel costs.  

 3. Overall cost

It is typically more cost effective to run an electric pump over an engine driven pump for a simple reason: electric power costs less than fuel. In general, contractors can experience savings up to 50% or more using electric power on the job site.  

Electric pumps are also advantageous when considering maintenance costs. As the design and manufacturing of electric pumps have evolved, they have been built to be extremely durable and wear resistant. This has allowed maintenance service fees over time to be much more affordable, at lower frequencies. Most standard diesel engine pumps need oil and filter change after a certain number of hours of use, which means extra stoppages and additional costs. Electric submersibles are also portable, which means they are much easier to transport around the jobsite, easing the workload. 

5. Cavitation 

Cavitation occurs when air bubbles are generated inside a pump due to a drop in pressure, turning the liquid into vapor and, as the pump’s impellers spin, back to liquid again. The air bubbles that are formed instantaneously implode, eroding the impeller surface, causing decreased pump performance and premature pump failure. 

Without getting into specific detail, two types of cavitation are possible: suction and discharge. The more common type, suction cavitation, is virtually eliminated with an electric submersible pump, which has an open suction near the pump impeller and does not rely on a hose to draw liquid through a long suction hose. 

Discharge cavitation can occur in a submersible pump, but is less likely and can be eliminated by following manufacturers’ minimum required submergence and running the pump at or near its best efficiency point (BEP).  

Mike Klimes is an application engineer for Tsurumi (America) Inc., a division of Tsurumi Manufacturing, and has more than 20 years of engineering and manufacturing experience. He is responsible for solving customer issues by offering in-depth performance analysis through the complete life cycle of pumping applications. Klimes joined Processing’s editorial advisory board in .

Tsurumi (America) Inc. has provided industry-leading pumping technology in construction, civil engineering, mining, industrial wastewater, domestic wastewater, sewage treatment, flood control and scenery creation fields for more than 40 years. For more information, call 630-793- or visit tsurumipump.com.

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