MEP Engineering Services in East Side Chicago, Illinois.

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Property owners throughout Shirley, New York have come to rely on NY-Engineers.Com for a wide range of engineering services ranging from Sprinkler Engineering to CAD to Revit Modeling. For this reason property owners in East Side Chicago will tell you that if you’re seeking a top-rated MEP Engineering firm in East Side Chicago, IL you should consider New York Engineers.

Chances are, you have walked through any specific type of building and seen the outcomes of MEP Engineering. Simply put, MEP focuses on the mechanical, electrical and plumbing facets of engineering. Essentially, MEP already gives rise to the most frequent and spot-on notion of what exactly is MEP. Our article goes into some specifics of what is MEP Engineering.

As far as the mechanical part is concerned, for both commercial and residential engineering, this relates to anything that moves. Furthermore its involves the use of complex and easy machines along with other mechanical mechanisms to perform certain tasks. Some common mechanical engineering tasks that can be noticed on a day to day bacis are kitchen or bath exhausts, HVAC units, cooling and heating air systems, heating & cooling equipment and systems that deal with increasing the energy productivity.

The electrical aspect of construction is focused on the electrical safety, functions, components, and even more importantly, the wiring associated with a building. Engineers in this section go to great lengths to make sure that the schematics of the building are meant to provide adequate power to every individual component in a safe manner ensuring that every one of the electrical codes are met. Some familiar electrical engineering jobs are available in the lighting design, modifying the voltage and allocating the electricity to every component within the building that needs a supply.

As far as plumbing, there is certainly a wide array of plumbing factors that constitute the final model of any building. Plumbing engineering goes deeper than simply faucets, toilets, and sinks, and contains many behind the scene devices. These being the drainage line and sewage as well as the buildings domestic water supply and just how it flows.

As we wrap up our article we now have just reviewed what is MEP Engineering. MEP Engineering is administered within the construction industry. And, aids in completing the often overlooked technical areas of any building.

Hiring an MEP Engineering Firm in East Side Chicago is Necessary for Large Construction Projects

Employing an MEP engineering company in West Chatham Chicago, ILO, could have everything to do with the safety of your construction project. These professionals might help offset the price of making this sort of hiring decision in relation to energy upkeep alone. While you are speaking about huge commercial structures, energy saving is really a topic of discussion. It’s time to determine various other great factors behind using MEP engineers in New Chinatown Chicago, Illinois.

Engineers play an important role in the structural reliability of your building. If you may well envision, that means the unseen is very essential. Design not only deals in looks but the underpinning of a building also its mechanism. That is certainly just another solid logic why using an MEP engineering firm will likely be helpful to your project.

Consider all the pipes and plumbing. Take into account the air conditioning systems and the importance of getting each one of its mechanics inside the correct places. Energy saving was stated, and energy competence is another significant term to discuss. Energy competence is related to your HVAC system, plus it plays an important part in energy maintenance in general.

Consider your building’s footing. Consider installing home security systems along with the security and safety measures put in place through the structure. With everything described up to now, it’s reliable advice that lots of aspects of building construction could be either ignored or minimized short of MEP engineers on the job.

Now with this info you will look for the very best MEP engineering company in the industry, right? It’s very obvious how the best engineers really need to be working in the large building of commercial structures. Tailor made will be the right term to make use of to explain the way in which these experts will modify a construction project to meet the needs of your operations. Even with all of this information you would like additional details about the MEP Engineering services in East Side Chicago, IL by NY Engineers we invite you to visit at our blog.

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How Construction Engineers are Improving HVAC Efficiency in Commercial Buildings with Variable Frequency Drives

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HVAC systems come in various configurations that differ significantly from each other. For example, an air conditioning system based on packaged rooftop units is drastically different from a chiller plant. However, HVAC installations have a common denominator: they use electric motors that are subject to variable loads. Regardless of whether these motors are used to drive compressors, water pumps or fans, construction engineers understand that there is a great opportunity to save energy by optimizing part-load operation.

In general, running a motor at partial speed is more energy-efficient than running it intermittently at full speed.

  • Intermittent operation only provides linear savings. For example, a cooling tower fan with a duty cycle of 80% consumes 20% less energy than an identical fan operating full-time.
  • Reducing motor speed provides cubic savings.. On the other hand, slowing down a fan to 80% speed reduces energy consumption by nearly 50%. The average airflow is the same as that of a fan running at full power 80% of the time, but savings are boosted significantly thanks to speed control.

Speed control can be accomplished with variable-frequency drives (VFD), and they have a broad range of applications in HVAC systems due to the cyclic nature of loads. It is important to note that VFDs are also known as variable-speed drives (VSD), adjustable-frequency drives (AFD) or adjustable-speed drives (ASD).

Fractional horsepower motors in small-scale HVAC systems can also achieve significant savings with speed control. The main difference here is that electronically commutated motors (ECMs) are more cost-effective than VFDs in these applications.

Ask a Construction Engineering Expert: How Does Variable Frequency Drive Work?

As explained by electrical engineering textbooks, the speed of an electric motor is defined by the power supply frequency and its internal construction. For example, a motor running at 1800 RPM with the 60 Hz USA power supply would run at 1500 RPM in the UK, where the frequency is 50 Hz. Thus, if a motor is suitable for operation at reduced frequency, its speed can be ramped down during part load conditions to achieve energy savings. VFDs are connected between the power supply and the motor, adjusting voltage and frequency as a means of speed control.

In applications where only single-phase power is available, VFDs can be used to integrate three-phase motors while achieving the energy efficiency benefits: there are models capable of producing a three-phase voltage from a single-phase input, while adjusting magnitude and frequency to control motor speed.

In addition to improving energy efficiency, VFDs allow motors to be soft-started by gradually ramping up the voltage and frequency, as opposed to directly applying full voltage at 60 Hz. Electric motors draw from five to eight times their rated current when started directly, and the voltage drop that results from the inrush current may damage sensitive equipment.

The main limitation of VFDs is that they produce a phenomenon called harmonic distortion, where high-frequency currents are induced in branch circuits. However, this can be controlled with a properly-specified harmonic filter; this device absorbs current distortions at the point of consumption, preventing their propagation throughout the installation.

VFD Applications in HVAC Systems

In most cases, VFDs are deployed by construction engineers in HVAC systems to control the speed of blower fans, pumps or compressors.

Cooling Tower Fans

The main purpose of a cooling tower is removing the heat from a water circuit, which may be used in turn for process cooling or for a chiller plant. Cooling towers use fans to establish an airflow, improving heat removal through convection. These are open discharge fans, where there is no ductwork creating resistance to airflow; hence, the savings opportunity through speed control is significant.

When a VFD is deployed for a cooling tower fan, speed is normally controlled based on water temperature. Rather than cycling the fan on and off, it can be driven at reduced speed so that the water returning to the chiller or process is kept at a constant temperature – as previously explained, reduced-speed operation is far more efficient than intermittent operation at full speed.

Air-Handling Units and Packaged Rooftop Units

Unlike the fans in cooling towers, those used in AHUs and packaged RTUs blow air into a duct system, which offers higher resistance and requires a specific static pressure and airflow to be established. These ducts may have several outlets with variable-air-volume (VAV) boxes, where airflow is controlled individually for each zone with a damper.

Without a VFD, the blower fan in the AHU or RTU operates at full speed, and each VAV box is adjusted individually. This is an inefficient approach, however – if neither of the VAV boxes is fully open, energy is being wasted in the form of extra pressure. On the other hand, if the blower is equipped with a VFD, an interesting energy-saving strategy becomes possible:

  • Blower speed can be gradually reduced while VAV boxes are opened incrementally, to keep the airflow and temperature constant.
  • The temperature of different zones is unaffected but pressure is reduced, saving energy.
  • Speed reduction continues until one of the VAV boxes reaches the fully open position. At this point it is not possible to reduce speed further without affecting indoor temperatures.

There is also a comfort benefit with this control strategy: the reduced pressure drop translates into less noise, making indoor environments more comfortable.

Speed Control for Water Pumps

Water circuits are a key element of many HVAC installations, including those that use chillers, boilers and water-source heat pumps. Since HVAC loads are variable, it is often necessary to adjust the water flow depending on total system load. There are three main ways to achieve this:

  • Choke Valve-A choke valve is installed in line with the flow, and as implied by its name it regulates flow by closing partially. This control method is simple, but the resulting pressure loss represents a considerable waste of energy.
  • Recirculation Valve-With this approach a valve is installed on a parallel recirculation circuit, and it is opened gradually to divert a part of the water flow, reducing the flow in the main circuit. In this case, however, there is also a significant energy loss because the recirculated water represents pumping power.
  • Pump Speed Control– The most energy efficient approach is to install a VFD on the pump motor. If a reduced water flow is required, it is just a matter of reducing the pump speed accordingly. With no pressure or recirculation losses, the savings achieved are significant. This setup also uses a choke valve for convenience, but it is normally kept in the fully open position, since the VFD regulates flow.

Chillers with Variable-Speed Compressors

In chilled water air conditioning systems, the chiller is by far the piece of equipment with the highest energy consumption. Therefore, installing the most efficient chiller model that can be afforded is highly recommended.

Energy efficient chillers have helical rotary compressors, capable of adjusting their speed with a VFD, depending on cooling needs. Some models may feature multiple individual compressors to achieve enhanced flexibility and increased part-load efficiency.

When a chiller is highly efficient, the control strategy is normally based on maximizing its capacity rather than running it at the lowest possible set point. The savings achieved by reducing the load on complementary systems tend to be far greater than the extra consumption at the chiller. There are exceptions, of course, and only monitoring and control can offer the correct answer 100% of the time.

Integrating the Entire HVAC System

Equipping all motors in an HVAC system with VFDs is a first step towards energy efficiency, but the best results can only be achieved with central control system, capable of assessing building conditions and adjusting HVAC set points in real time.

The interaction between a chiller and a cooling tower is a great example of how control engineering and VFDs can be applied to HVAC installations:

  • Reducing the cooling tower fan speed increases the cooling load on the chiller.
  • The reverse also applies: reducing refrigeration power at the chiller may require more heat to be rejected by the cooling tower.

If the chiller has a high efficiency, the best option in most scenarios is reducing the cooling tower load. However, only a control system can balance the operation of both components in real time. Ideally, the control system should be able to determine the set point for each individual VFD so that power consumption is minimized at the total system level.

Of course, the performance of an HVAC system starts from the design phase. For optimal results, make sure you work with licensed and qualified construction engineers and other HVAC professionals. Installing an efficient and automated HVAC system from the start is much less expensive than upgrading an existing installation.

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2018-08-29T03:45:44+00:00