Hiring a HVAC Engineering Contractor in Near West Side Chicago

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Looking for HVAC Firms in Chicago? The one to go to is NY-Engineers.Com. Not only for HVAC Chicago but also Electrical Engineering and Sprinkler Engineering near Near West Side Chicago. Call (+1) 312 767-6877

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Construction Engineer Job Description

A lot of construction companies throughout White Plains, New York already know that New York Engineers is the engineering company to contact when you’re searching for Electrical Engineering in NY. What many local construction companies have yet to realized is that NY Engineers is also your best choice if you’re searching for HVAC Engineering services in Near West Side Chicago, IL.

Employing a HVAC Company in Near West Side Chicago involves the capability to investigate and comprehend what’s needed for your construction. Every individual will probably be dissimilar in relation to the contracting procedure and it is best to look at these attributes.

1) Expertise: An effective firm will usually have skilled staff onboard to aid with HVAC requirements. These professionals aren’t just qualified but will have many years of know-how in the business. This keeps everything simple, streamlined, and as proficient as you want them to be. Clients could seem confident with a professional readily available to aid.

2) Portfolio of work: Look into their reputation to see exactly how they’ve done in the past. It can help shed light on whether the company is a passionate team that achieves great results. If there are problems with their portfolio then it’s likely to filter into the set up. Focus on this as quickly as possible!

Here signify the techniques for working with a high-level company and making certain the perfect solution meets the proper standards. If not, the firm can find themselves having more problems than solutions. Get started with the following tips and create a simple checklist to have the procedure easier.

This is why most engineers are brought on as consultants as they get practice. Then, they might be only responsible for the following element of the design process and will provide insight of what works or what doesn’t.  Most HVAC systems are established by using an Near West Side Chicago HVAC design engineer.

Key HVAC Design Engineer Tasks

An HVAC design engineer in Near West Side Chicago is going to be granted a list of various duties depending on the business, its needs, and how the job unfolds.

On the whole, the HVAC design engineer duties will contain a number of duties which includes inventing different HVAC systems. All assignment will probably be exclusive since patrons bring modified needs. These requests might include the size of their system, how it’s going to function, and the performance metrics they’re after with a brand new HVAC system.

A qualified Near West Side Chicago HVAC engineer is going to sit back, grasp these needs, and plan out a complete HVAC system with high-quality design tools. Things are kept in mind throughout this time and that’s what HVAC design engineers are expected to complete. Together with designing the HVAC system, the engineer has to ensure the system is installed correctly and fits in accordance with what the client is after.

This is the reason a lot of engineers are brought on as consultants as they gain practice. In those situations, they might be only accountable for the following step of the design and might provide insight on what works or what does not.  Most HVAC systems are creaded through the help of an HVAC design engineer in Near West Side Chicago. There’s only so much you can save this page if you would like more details about the HVAC Engineering services in Near West Side Chicago, Illinois by NY-Engineers.Com we invite you to check out at our blog.

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Operating Modes of VRF Systems in HVAC Engineering

Architectural Engineering Degree

Variable Refrigerant Flow (VRF) is an HVAC engineering (air conditioning) technology that achieves an extremely high efficiency by varying the flow of refrigerant to indoor units, based on the exact demand of each individual area. This ability to control the flow of refrigerant makes VRF systems ideal for applications with varying loads. In addition, VRF systems can also provide space heating, consolidating two building systems in one and saving space.

VRF technology is available in two versions – heat pump systems and heat recovery systems. Heat pump VRF systems can either cool or heat the entire building but cannot perform both functions at the same time. Heat recovery systems do not have this limitation and can serve simultaneous heating and cooling loads, thus leading to 3 different modes of operation:

  • Cooling mode
  • Heating mode
  • Simultaneous cooling & heating, or heat recovery mode

VRF Systems in Cooling Mode

In cooling mode, VRF operation is not very different from that of an air conditioning system: indoor units are supplied with liquid refrigerant, and an expansion valve inside each unit controls the amount of refrigerant flowing through. When refrigerant enters the cooling coil, it undergoes evaporation, removing heat from indoor air and thereby cooling the room. The heat extracted from indoor spaces is then rejected outdoors.

VRF systems are much more efficient than conventional packaged rooftop units (RTU), packaged terminal air conditioners (PTAC) and window units, according to HVAC engineering experts. Ductless mini-split systems and water-cooled chillers offer a similar efficiency in cooling mode but are unable to operate in heating mode.

VRF Systems in Heating Mode

Unlike cooling mode, where indoor units receive liquid refrigerant, here they are supplied with hot gas refrigerant. Gas flow to individual units is controlled with the same electronic expansion valves used for cooling mode, and the heating effect occurs when hot gas undergoes condensation.

The basic principle is still the refrigeration cycle, with the difference that heat is absorbed from outdoors and rejected indoors; in simple terms it is like air-conditioning the cooler outdoor environment to remove heat from it and use it indoors. This operating mode change is made possible with special 4-way reversing valves, which exchange the roles of evaporator and condenser between indoor and outdoor units.

In heating mode, the electric power consumed becomes useful heat, while in cooling mode it is rejected outdoors. Thus, a VRF outdoor unit can operate above 100% of its rated capacity when in heating mode. However, it is also important to note that the capacity may be derated, especially when the system is subject to a large variation in outdoor conditions. Longer piping lengths, longer distances between the outdoor unit and the last indoor unit, and higher vertical separation are some other causes of derating.

VRF Systems in Heat Recovery Mode

A heat recovery system is ideal when simultaneous heating and cooling are required. The greatest efficiency is achieved when the heating and cooling loads are equal, by maximizing the amount of energy transferred from one zone to another using the refrigerant. Heat rejection from cooling spaces can be utilized for space heating in the areas that need it at the same time. Thanks to this configuration, each occupant is free to choose either cooling or heating mode.

Heat recovery systems are very useful when a building has an east-west or south-north orientation with glass façades. East-west and south-north orientations cause a large difference in load requirements for each direction during the morning and evening, providing a chance for the VRF system to operate in simultaneous heating and cooling mode. Heat recovery is particularly useful in buildings with electrical rooms or data centers that need permanent cooling, since they also become a constant source of heat.

Heat Recovery System Piping Configurations in HVAC Engineering

Heat recovery systems come in 2-pipe and 3-pipe configurations, where the 2-pipe system is the option requiring the highest refrigerant flow. To operate with reduced flow, the 3-pipe system has a liquid line, a high-pressure gas line and a low-pressure gas line. The control function is achieved with a Mode Change Unit (MCU) or Mode Selection Box, which has three headers for high-pressure gas, low-pressure gas, and liquid.

  • When there are zones that need space heating, their indoor units work like condensers, supplying heat from the condensation of high-pressure refrigerant gas. After heating, the saturated refrigerant is fed to the liquid header.
  • Liquid refrigerant is then supplied to the units in space cooling mode, where it evaporates and absorbs heat, becoming a low-pressure gas.
  • The low-pressure gas is returned to its respective header and then to the compressor, repeating the cycle.

In this case, the outdoor unit must only provide the balance between heating and cooling – the one that is higher will determine the operating mode of the outdoor unit.

  • If cooling load is higher, the outdoor unit operates as a condenser, rejecting the surplus heat outdoors.
  • If the heating load is higher, the outdoor units operates as an evaporator, drawing from outdoor air the extra heat needed inside.

The best recommendation is locate the MCU in a public access area such as a corridor, thus minimizing noise and disruption for the end user. Maintenance of heat recovery systems is relatively easy, since the outdoor condenser unit is only connected to the MCU, facilitating system separation into upstream and downstream portions.

As per ASHRAE Standard 34-2013, the refrigerant concentration limit (RCL) is 26 lb per 1,000 ft3 of room volume for occupied spaces, and 13 lb per 1,000 ft3 for institutional buildings. This can be easily achieved by locating the units outside of compact rooms. According to Standard 15, a VRF system is classified as a direct system/high-probability system where a refrigerant leak can potentially enter occupied space.

The use of heat recovery systems in VRF proves to be better option, economically and environmentally, in these types of HVAC engineering systems. This spares the building owners from having to install and service two separate systems, while achieving a very high efficiency. With separate systems for space heating and cooling it is impossible to boost efficiency by exchanging heat, even if both systems are very efficient separately.

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What Can Our HVAC Engineers in Near West Side Chicago Do For You? When you re looking for a competent HVAC Engineering in Chicago? The one to go to is NY-Engineers.Com. Not only for HVAC Firms in Chicago but also Electrical Engineering and Sprinkler Design Engineering near Near West Side Chicago. Contact us at 312 767.6877 Over the last decade many property owners throughout Auburn, New York already know that NY-Engineers.Com [...]