HVAC Oak Park Chicago2018-11-24T20:58:26+00:00

HVAC Oak Park Chicago | Expert Power Efficient System Designs

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Don’t be misled by the name New York Engineers is the top choice if you are searching for Full Service Heating and Air Conditioning (HVAC) Engineering Firm in Chicago Illinois. We’re not only an HVAC Chicago but also a leading provider of Electrical Engineering Engineering services in or near Oak Park Chicago. Contact us at (+1) 312 767-6877

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Lately huge crowds have been taking a look at the NY-Engineers.Com website searching for Architectural Engineering in the Chicago area. This is due primarily due to the following we have built in this kind of work. Nevertheless, a lot of building managers from Downers Grove to Rockford Township, are not aware that New York Engineers is also the ideal choice for anyone searching for HVAC Company near Chicago!

The quest for energy-efficient buildings involves energy-efficient HVAC system design. This will include systems for domestic water heating, architectural enclosure, HVAC, lighting, and vertical transportation. The loads for that HVAC systems can come primarily from five different places including lighting (cooling), the property envelope (cooling and heating), ventilation (cooling and heating), equipment for program use (cooling) and occupancy (cooling).
The ventilation load is a purpose of either the instruments required in order to introduce it in a space and control contaminant concentration or the number of folks which will occupy the area. In the vast majority of climates from the eastern and southwestern areas of the usa, to lower outside air flow helps save energy whenever the exterior air is either humid and warm or very cold.
Governing the ventilation rate is going to be dependant upon occupancy which is known as a type of demand control ventilation. This really is a everyday sort of energy conservation tatic that is utilized for rooms with intermittent or dense occupancy. Having heating and cooling loads dropped to a minimum can be achieved by using a high performance building envelope, occupancy sensors, and performance lighting that apply daylight response of lighting controls.

Chicago HVAC Engineers versus HVAC Techs

If you have ever considered the difference between a HVAC Technician versus HVAC Engineers, then continue reading:

Chicago HVAC engineers are definitely the folks that oversee installing of air conditioner systems for both commercial and residential buildings. They spend a great deal of their work in offices doing higher level management and arranging of installations however they do also see job sites from time to time.

On the other hand, HVAC technicians tend to do a lot of the hands-on work  that deals with repair and maintenance. A HVAC technician may assist an engineer to perform some of the installation work, particularly for smaller jobs. Generally speaking HVAC techs do a lot more travel and may spend time and effort identifying leaks, changing filters, doing recharges or getting rid of old and outdated systems that use old refrigerants.

HVAC engineers may have the ability to make more decisions about systems that are employed, plus they are the folks that would offer advice about probably the most sensible refrigerants and which systems would be perfect for a much bigger building. In the trade, there is some rivalry between ‘the suits’ and ‘the ones that will get their hands dirty’, but the two jobs require a great knowledge of how air conditioner works. Lately huge crowds have been crawling the New York Engineers website searching for things like HVAC in Chicago. Nevertheless, the focus of our organization is to be the top option for anyone seeking a HVAC Chicago and or any of our other services including Sprinkler Engineering services. We ask that everybody searching for additional information about our Heating and Air Conditioning (HVAC) Engineering Firm in Chicago Illinois checks out at our Sprinkler Engineers blog.

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Advantages of Electronically Commutated Motors in Electrical Engineering

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Electronically commutated motors (ECMs) can achieve significant energy savings in electrical engineering applications where fractional horsepower is required. Although NEMA Premium Efficiency motors with variable-frequency drives provide the most efficient solution to drive equipment above 1 hp, induction motors are outclassed by ECMs as the rated horsepower is reduced.

What is an Electronically Commutated Motor?

Although ECMs are designed to run with an AC power supply, it is important to note they are actually direct-current motors with permanent magnets on their rotor. Unlike conventional DC motors, which create a rotating magnetic field with a combination of brush contacts and slip rings, ECMs achieve the same effect with a voltage rectifier and an electronic control circuit. As a result, the friction and sparks associated with brush contacts are eliminated, and this is one of the reasons why ECMs are so efficient. They also have a longer service life than brushed motors, since the wear associated with sparks and friction is eliminated. Compared with other common types of fractional horsepower motors, ECMs are the top choice in terms of efficiency:

  • Shaded-pole motors are very common and more affordable, but their efficiency is very poor, going below 20% in some cases.
  • Permanent-split capacitor (PSC) motors have an average efficiency of 40%, which means they outclass shaded-pole motors. In terms of efficiency, they are an intermediate option between shaded-pole motors and ECMs.
  • ECM efficiency is normally above 60%, which means they consume one-third of the energy used by shaded-pole motors on average.

ECMs can also be manufactured with built-in speed control circuits, allowing them to operate at reduced speed without relying on an external VFD. It is also important to note that ECMs do not suffer a drastic reduction in their efficiency when operating below rated RPM. Fixed-speed ECMs are also available for applications where speed control is not necessary.

Electronically Commutated Motors in Electrical Engineering Applications

ECMs are normally the most efficient option in fractional horsepower applications, but they tend to deliver the highest savings when used in air-conditioning and refrigeration systems. Being more efficient that shaded-pole and PSC motors, they also dissipate less heat, and the reduced heating effect helps AC and refrigeration systems operate more efficiently. This effect applies for all air-conditioning or refrigeration components that are found inside the conditioned space, such as air handlers and evaporators.

As an example, assume a cold-storage room has an evaporator unit with five shaded-pole motors, consuming 900W each. They are replaced with ECMs that only consume 300 W each.

  • 600 W are saved per motor, for a total of 3,000 W.
  • However, these 3,000 W are also subtracted from the refrigeration load. If the system operates with a coefficient of performance of 3, an extra 1,000 W of electric power are saved.
  • In other words, this upgrade saves 3 kW in motor power and 1 kW thanks to refrigeration load reduction.

Keep in mind this is just a simple example, and each electrical engineering project requires a detailed analysis to know the exact savings. However, the heating reduction benefit applies for all cases where ECM motors are deployed in air-conditioned or refrigerated locations.

The brushless design of ECMs makes them quieter than their less efficient counterparts, which also provides a comfort advantage. In business applications, the silent operation of ECMs helps employees concentrate better. ECMs are also lighter than other types of fractional horsepower motors, which makes them easier to install.

Electronically Commutated Motors in Ventilation Systems

As previously stated, shaded-pole and PSC motors are inefficient. Also, three-phase motors with VFDs are impractical for fractional horsepower applications, unable to offer the efficiency that characterizes them in larger systems. Ventilation systems represent an excellent opportunity to deploy ECMs, for two main reasons:

  • Fans with fractional horsepower are common, which means they are often driven by shaded-pole or PSC motors.
  • Many fans have intermittent operation, which represents a chance to use ECMs running at reduced speed. For example, running a fan 80% of the time saves 20% of the energy, while running it at 80% speed saves nearly 50%.

ECMs are a highly recommended upgrade for furnace fans, since they can achieve a much more uniform temperature distribution with their speed control, in addition to offering the energy savings that characterize them.

Payback Period of ECM Upgrades

Like with many energy efficiency measures, the financial benefit of an ECM upgrade changes depending on project conditions. The project payback period can only be calculated with precision after a detailed analysis by a professional energy consultant, but in general the following results can be expected:

  • Replacing shaded-pole motors normally yields a faster payback period than replacing PSC motors, since the efficiency gain is higher. Of course, there can be exceptions; replacing a PSC motor that is used frequently may yield higher savings than upgrading a shaded-pole motor that is only used moderately.
  • ECMs can also be an attractive option in appliances that require speed control. Other types of motors may suffer a drastic efficiency reduction at partial speed.
  • As previously mentioned, the energy savings are higher when ECMs are deployed in air-conditioned or refrigerated spaces.

The financial return of an ECM upgrade can also be enhanced if there are incentive programs at the project’s location. The incentive is calculated based on yearly energy savings, at a rate of $0.16/kWh.

Conclusion

Electronically-commutated motors (ECMs) can achieve significant energy savings in fractional horsepower applications, especially when they replace shaded-pole motors. However, like with any energy efficiency upgrade, professional guidance is highly recommended when defining the project scope and specifications.

When upgrading to ECMs, the return on investment is higher in some cases, and it others the payback period may be too long to justify the upgrade. Ideally, upgrades should focus on where the highest return is obtained from each dollar spent upfront. Recruit the help of an electrical engineering expertise to help you properly apply the information shared in this article to your project.

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