Project Snapshot: Alkermes

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Project Name: Alkermes
 Architect: Elkus Manfredi Archtects
Mechanical Engineer: AHA Consulting Engineers
Mechanical Contractor: Hamel & McAlister
Equipment: (2) Custom Penthouse AHUs, (2) EAHUs, (1) Konvekta Heat Recovery Skid (6) MK Plastics High Plume Dilution Fans, (2) 450 ton Oil-Free Chillers
Manufacturer: Konvekta, Cambridgeporrt, MK Plastics, Smardt, Ingenia
Size: 140,000 CFM Supply / 140,000 CFM Exhaust
DAC Sales Engineer: Matt Tefft

Project Overview

Alkermes, a global bio-pharmaceutical company, develops products that are designed to make a meaningful difference in the way patients manage disease.  Experiencing tremendous growth, Alkermes constructed a new 220,000 square foot, office-to-lab conversion core/shell building at 900 Winter Street as an expansion to their current facility within the Reservoir Woods at 852 Winter Street.

Solution

In order to house base building mechanical equipment to support laboratory space demands, the custom supply AHUs by Cambridgeport were provided with equipment vestibules to support base building mechanical needs.  The (2) large vestibules are housing the Konvekta energy recovery skid, main chilled water piping, energy recovery piping, expansion tanks, air separators, chilled water pumps and VFDs. By integrating the mechanical space into the rooftop custom AHU vestibules, the building is able to maximize the square footage for usable space.

Project Highlights

Konvekta:

  • The Konvekta pumped glycol energy recovery system provides variable flow pumped glycol energy recovery between the 100% OA and 100% exhaust air-streams, treating 140,000 CFM of supply air and 140,000 CFM of exhaust air. The coils are manufactured specifically for efficiency and turn-down.  The system will be remotely monitored for performance and guarantees energy recovery performance to the owner.  When energy recovery alone is not enough to meet supply unit temp setpoint requirements, heat (via boiler hot water) is injected into the glycol ER loop via plate / frame heat exchangers enabling the energy recovery coil to provide both heating and energy recovery functionality. This means, no hot water coil required in the AHU or any branch HW piping to the AHUs.  Konvekta will provide reports to the owner on how the system performed for proof of performance.

 

 

Smardt: (2) 450-ton custom / oil free air-cooled chillers are on the roof.  These chillers include:

  • (4) Magnetic bearing (Turbocor) compressors
  • Integral free cooling and low ambient kit, down to -40°F ambient operation. When cold enough outside, the chillers provide cooling during winter months without the need to operate compressors.  This means no need for separate fluid coolers that require additional piping, controls and roof space.
  • Low noise condenser fans with inlet and outlet attenuation
  • Custom electrical layout: Dual points of power to provide flexibility in generator sizing during emergency scenarios. Free cooling and a portion of mechanical cooling will be available power outage to provide cooling needs to critical spaces at lower power consumption rates than single point of power would provide
  • Industry leading efficiency, especially at part loads
  • No oil!

Cambridgeport:

  • Custom AHUs and large equipment vestibules
  • EC fan arrays

 

 

 

 

 

MK Plastics:

  • High plume dilution lab exhaust fans
  • Direct drive, arrangement #4
  • Motors are down low at roof level for ease of serviceability
  • High nozzle velocities to create a safe plume which allows for a large range of fan turndown before needing any bypass air as per ANSI Z9.5. (3,000 FPM min velocity required).

 

Ingenia:

  • Custom recirculation AHU serving a clean room for the biologics suite
  • Custom feature included anti-microbial powder coat interior liner to provide the ultimate cleanliness, the unit served ceiling installed HEPA filtration

 

Related Manufacturers

Konvekta, Smardt, Cambridgeport, MK Plastics, Ingenia

Related Blog Posts:

 

 

 

Designing Mega-AHUs

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The advent of fan arrays along with the increased cost competitiveness in the custom air-handling unit (AHU) market has given rise to a new AHU design option: very large AHUs, or mega-AHUs, designed for over 100,000 cfm (50 000 L/s). Here are the advantages and disadvantages of mega-AHUs vs. multiple floor-by-floor AHUs for high-rise buildings and reviews design considerations and options.

Fan Arrays
One of the most significant innovations in air-handling unit design is the concept of using an array of small single-width, single inlet direct-drive plenum fans in lieu of the more conventional design that includes one or two large plenum or housed centrifugal fans. Fan arrays can be used for supply, return, and relief fan assemblies and they offer several significant advantages vs. conventional fan system designs:

• Reduced AHU length;
• Reduced sound power, especially on the discharge side;
• Improved redundancy;
• Reduced fan energy if sound attenuators or system effect are eliminated;
• Easier motor and fan replacement; and
• Easier to install in retrofit applications.

Disadvantages include higher (but ever falling) first costs and increased weight for the fan section. These are minor relative to the advantages.

Custom Air Handlers
Another significant change in the industry has been improved competitiveness of custom AHUs. Until recently, the cost premium for custom AHUs versus modular commercial AHUs was a factor of 5 or so. But improvements in manufacturing processes and lower labor rates in adjacent countries have caused the premium to be reduced to a factor of 1.5 or 2 from about 20,000 cfm (10 000 L/s) to 50,000 cfm (25 000 L/s). This premium can be offset by installation cost savings with the ability to make the AHU almost any desired dimension and aspect ratio and include any desired features. For AHUs above about 50,000 cfm (25 000 L/s), there is no cost premium for custom AHUs—this market sector is dominated by custom AHU manufacturers.

Mega-AHUs
The combination of fan arrays and affordable custom AHUs has also made it practical to design very large mega-AHUs. Our firm has designed several projects with AHUs in the 100,000 cfm (50 000 L/s) to 200,000 cfm (100 000 L/s) range serving large variable air volume (VAV) distribution systems. We have two high-rise office building projects in the design phase that have partially field-built VAV AHUs designed for 240,000 cfm (120 000 L/s) and 585,000 cfm (275 000 L/s), respectively.

Continue reading entire article

(Article provided by ASHRAE Journal, 04/2018)

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Chilled Water Coil – Circuiting Made Easy

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Chilled Water Coil – Circuiting Made Easy
(Credit to Guest Blogger: Dan Jacobs, Capital Coil & Air)

Circuiting a chilled water coil is one of life’s great challenges in the coil business. You’re bound to run across folks with years of experience in the industry that can not effectively explain this concept. While not the most exciting of subjects, the necessity of circuiting chilled water coils can not be overstated. Capital Coil & Air has attempted to simplify the idea of circuiting as much as possible.

For starters, circuiting a chilled water coil is ultimately up to the performance of that coil. Circuiting is really a balancing act of tube velocity and pressure drop. In other words, think of a coil as a matrix. Each coil has a specific number of rows, and a specific number of tubes within each row. For example, a chilled water coil might be 36 inch fin height and 8 rows deep. The coil has 24 tubes in each row, and multiplied by 8 rows, there are a total of 192 tubes within the coil. While you can try to feed any number of tubes, there are only a few combinations that will work.

  • Feeding 1 tube – you will be making 192 passes through the coil, which will essentially require a pump the size of your car to make that process work.
  • Feeding 2 tubes – equates to 96 passes, and your pressure drop will still be enormous.
  • Feeding 3 tubes – 64 passes, which is still too many.
  • Feeding 4 tubes – See above.
  • Feeding 5 tubes – Impossible as 5 does not divide evenly into 192 (passes).

To learn more, read entire article by Dan Jacobs, Capital Coil & Air, 06/28/2019

Related Blogposts:
Coils – Repair or Replace 
Coils – Construction vs. Performance
Cooling Coils and Moisture Carryover

Featured Manufacturer:
Capital Coil and Air is the leading manufacturer of commercial OEM HVAC replacement and custom design/build booster coils, fan coils, condenser coils, and DX Coils.
For More Information - askRick

 

 

Project Snapshot: Beverly Middle School | Thermo-Composite DX Units

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Project Name: Beverly Middle School
 Architect: Ai3 Architects
Mechanical Engineer: Griffith and Vary
Mechanical Contractor: PJ Kennedy & Sons
Equipment: 13 Rooftop Units with DX
Manufacturer: Annexair
Size: 5,700, 5,100, 6,800, 5,400, 4,500 5,600, 6000, 6,300, 5,750, 4825, 4,700, 6,600, 7,800 CFM
DAC Sales Engineer: Pat Will

Project Overview:

The City of Beverly embarked upon an exciting and much-needed effort to design and construct a new middle school to give students a learning environment enriched with the tools necessary to provide the highest quality educational experience.The project included construction of a new 231,509 SF, 1,395 student middle school serving grades 5 through 8. The project included a 4-story classroom core with each floor dedicated to one grade and a common outdoor learning area. The project included a 535 seat auditorium, a 352 seat cafeteria on the first floor for grades 5 & 6 and a 352 seat cafeteria on the third floor for grades 7 & 8, a gymnasium, classrooms, media center and administration spaces.

HVAC Highlights:

  • Hot Water Coils
  • DX Coils
  • Enthalpy Wheels
  • Thermo-composite panel system

The units at the Beverly Middle School were supplied by Annexair and incorporated their Thermo-composite panel system.  The design looked for replacement units that would weigh the same as original and provide 30% more capacity.  Weight was a key design factor.  The Annexair units are 30% lighter than traditional steel units, so we were able to satisfy the design criteria with a lighter unit.  Additionally, the units come with a lifetime warranty against corrosion.  Best of all they are the same cost as traditional steel units.

Outdoor units have a rain gutter above each access door and a watertight roof shall be provided with a

white TPO UV-reflective membrane. Units have the entire exterior finished with a PVDF coating designed for UV resistance. Panels needed to pass ASTM B117 3000-hour salt fog resistance test and ASTM D4585 3000-hour moisture condensation resistance test. In addition, the paint needed to meet AAMA 620-02 standard for color, chalking, gloss retention, and abrasion resistance. The air handler unit casing was provided with a lifetime warranty against corrosion resistance under normal use.

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Green Material for Cooling Identified

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Researchers from the UK and Spain have identified an eco-friendly solid that could replace the inefficient and polluting fluids used in most refrigerators and air conditioners 


When put under pressure, plastic crystals of neopentylglycol (NPG) yield huge cooling effects—sufficient to make them competitive with conventional liquid coolants. In addition, the material is inexpensive, widely available and functions at close to room temperature. Details are published in the journal Nature Communications.

The fluids currently used in the vast majority of refrigerators and air conditioners—hydrofluorocarbons and hydrocarbons (HFCs and HCs)—are toxic and flammable. When they leak into the air, they also contribute to global warming.

“Refrigerators and air conditioners based on HFCs and HCs are also relatively inefficient,” said Dr Xavier Moya, from the University of Cambridge, who led the research together with Professor Josep Lluís Tamarit from the Universitat Politècnica de Catalunya. “That’s important because refrigeration and air conditioning currently devour a fifth of the energy produced worldwide, and demand for cooling is only going up.”

To solve these problems, materials scientists around the world have sought alternative refrigerants that are solids. Moya, a Royal Society Research Fellow in Cambridge’s Department of Materials Science and Metallurgy, is one of the leaders in this field.

In their newly-published research, Moya and collaborators from the Universitat Politècnica de Catalunya and the Universitat de Barcelona describe the enormous thermal changes they achieved by putting plastic crystals under pressure.

Conventional cooling technologies rely on the thermal changes that occur when a compressed fluid expands. Most cooling devices use fluids such as HFCs and HCs. As the fluid re-expands, its temperature drops, cooling its surroundings.

With solids, cooling is achieved by changing the material’s microscopic structure. This change can be achieved by applying a magnetic field, an electric field or a mechanical force. Despite decades of work, the caloric effects achievable with a variety of solids have fallen far short of the thermal changes available in fluids. The discovery of colossal barocaloric effects using a plastic crystal of neopentylglycol, and other related organic compounds, has leveled the playing field.

Due to the nature of their chemical bonds, organic materials are easier to compress. In addition, NPG is widely used in the synthesis of paints, polyesters, plasticisers and lubricants. It’s not only widely available, but also is inexpensive.

NPG’s molecules, composed of carbon, hydrogen and oxygen, are nearly spherical and interact with each other only weakly. These loose bonds in its microscopic structure permit the molecules to rotate relatively freely.

The word “plastic” in “plastic crystals” refers not to its chemical composition but rather to its malleability. Plastic crystals lie at the boundary between solids and liquids.

Compressing NPG yields unprecedentedly large thermal changes due to molecular reconfiguration. The temperature change achieved is comparable with those exploited commercially in HFCs and HCs.

The discovery of colossal barocaloric effects (CBCE) in a plastic crystal should bring barocaloric materials to the forefront of research and development to achieve safe environmentally friendly cooling without compromising performance.

Moya is now working with Cambridge Enterprise, the commercialization arm of the University of Cambridge, to bring this technology to market.

(Article provided by the University of Cambridge – Enterprise, 04/18/2019)

For More Information - askRick

 

Konvekta Reduces Energy Consumption up to 80%!

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GROUND BREAKING!

High-Efficiency Run Around Energy Recovery Systems Reducing Energy Consumption up to 80%!

FIRST there were glycol run around loops
40% efficiency
THEN came plate and frame heat exchangers
60% efficiency
NEXT came heat recovery wheels
70% efficiency

NOW, high-efficiency energy recovery coils
UP to 80% EFFICIENCY!

Konvketa guarantees the amount of energy recovered!

 

 

 

 

 

 

Revolutionary Benefits

  • No Cross-Contamination of Intake and Exhaust Air
  • Unrestricted Location of Intake and Exhaust
  • Reduced Heating and Cooling Load
  • Existing HVAC-Systems Can be Retrofitted

Recent Success Story

A client could not meet energy code requirements with their current design. Konvekta worked with this client to not only meet the energy code, but the new design will also save them over $800,000 per year on a 600,000 CFM outside air system!

Without Heat Recovery Konvekta Savings
Heating $640,000 $40,000 $600,000
Cooling $960,000 $725,000 $235,000

Annual Savings = $835,000

Contact Us to help design your next energy recovery project with Konvekta.

Seresco NV: Dehumidification Through Ventilation

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Seresco NV: Using naturally dry outside air to remove moisture

Not every project requires compressors for dehumidification. In fact, the market for ventilation-only pool dehumidifiers is worth about $60 million per year in North America. You can take a piece of that pie, with the Seresco NV: dehumidification through ventilation.

The NV uses naturally dry outside air to remove moisture, unlike other Seresco products which use refrigeration technology to do the job. It’s also capable of providing up to 70,000 CFM supply air, making it a good fit for lots of different applications.   

Product Features and Benefits  

  • Plenty of airflow – 4,000 to 70,000 CFM of supply air.  
  • Automatically adjusts outdoor air usage for best possible conditions and lowest cost, using CommandCenter® control system.  
  • Save money on outside air pre-heat during cold weather with heat recovery through a highly efficient glycol runaround loop.
  • Auxiliary heat options, including gas furnaces for packaged unit needs.  
  • Sensible cooling is possible with a chilled water hookup or DX cooling.  

Let’s take a look at some application examples for the NV.  

Dry Climates  

Any pool facility in a dry climate is a candidate for the NV because it can maintain space conditions for a higher percentage of the year, simply by using the air outside to ventilate the natatorium.  

Indoor Water Parks  

These facilities, with their great expanses of water coupled with lots of patrons and plenty of splashing, are often too much for traditional dehumidifiers to handle. The NV can handle this load while satisfying the facility’s excessive outdoor air requirements because of the large number of patrons.  

Where Control Isn’t Everything  

The NV is great for bringing in lots of outdoor air, but during extreme conditions that isn’t enough to control the conditions of the space without additional treatment of the air.  

But what if the owner doesn’t care?  

A facility, for example, may have a retractable roof and French doors that can open when it’s very hot and humid out to turn into an outdoor pool. When it does that, the unit is off and the owner has given up control of the space.   

In situations like this, the NV is fine for the cooler parts of the year where it has an easier time maintaining conditions.  

While it works best in dry climates, the NV can be used anywhere – as long as the owner understands its limitations.   

Pros and Cons to Remember  

The NV presents a lower upfront cost than a compressorized unit. Additionally, it needs less electricity to run, so facilities in places where electricity is very expensive or in short supply (like remote areas) may also find this product attractive.  

But ventilation-only units still typically cost more to run than compressorized units. This is because a compressor unit uses a minimum of outside air and recycles latent energy into the pool water and into the air. A ventilation unit throws that away and brings in fresh air — you must heat the air and the water (the NV comes standard with a glycol runaround loop for cold air pre-heat, to reduce these costs.)  

The Bottom Line  

The NV has many benefits, applicable to specific situations. When looking at the NV, it’s a good idea to be clear with the owner what the limitations are and to do a full cost analysis to see if it is suitable.  

Please contact us to discuss your dehumidification applications.

Featured manufacturer:
Seresco

For More Information - askRick

 

Three Key Advantages of AGronomic IQ’s Dry Coolers

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AGronomic IQ’s dry coolers eliminate refrigerant leaks in grow rooms.

What you may not know about grow rooms is that a refrigerant leak can kill the entire crop in under 24 hours, so it’s really important to minimize the risk of that ever happening. 

Agronomic IQ virtually eliminates the risk by using its proprietary dry coolers as the outdoor heat rejection devices. They offer the ultimate in redundancy and scalability for customers, allowing you to place one, two or 20 (or more!) in one job to meet the demands of the facility. 

Here are three big advantages to Agronomic IQ’s dry coolers:

They save money

AGronomic IQ’s dry coolers have many elements that are attractive to potential customers, but one is undoubtedly their ability to save money. Because they use glycol as their coolant, refrigerant charge is dramatically decreased. You can also use PVC to virtually eliminate on-site refrigerant work, cutting installation costs. Finally, the dry cooler couples with their patent-pending economizer cooler, saving more than 30% in energy costs in cool climates!

They’re good for the environment – and the crop

Environmental stewardship is something we know customers in the indoor agriculture market care very deeply about. That’s why they love that AGronomic IQ’s dry coolers don’t use environmentally-harmful coolant. As well, their equipment virtually eliminates the risk of a plant-killing refrigerant leak! 

Superior cooling even in winter

Agronomic IQ’s dry coolers do not suffer from low-ambient concerns which plague the air-cooled condensers found in conventional split DX systems. This industry is unique by requiring 100% cooling capacity in the dead of the winter – AGronomic IQ’s dry cooler units have no problems providing it!

Please contact us to discuss your climate control grow room applications.

Featured manufacturer:
AGronomic IQ

For More Information - askRick

 

ACEEE 2018 State Energy Efficiency Scorecard

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Massachusetts Ranks #1 as Most Energy Efficient State for 8th Year in a Row 


As the US government loosens environmental rules, states are investing more in energy efficiency and delivering increased power savings, according to the 2018 State Energy Efficiency Scorecard. This 12th annual report from the American Council for an Energy-Efficient Economy (ACEEE), identifies the leaders and once again, Massachusetts came out on top.

The scorecard offers mostly good news about energy efficiency — the nation’s third-largest electricity resource. In response to federal efforts to freeze US vehicle and appliance standards, quite a few states worked to retain their own standards and to promote zero-energy buildings. Many states unveiled plans to boost investments in efficiency and clean energy, often driven by concerns about climate change.

The scorecard, which ranks states based on 32 metrics in six areas, had these key findings:.

  • Massachusetts continued to rank #1 overall. It launched a plan to set new three-year energy savings targets and approved utility spending for grid-scale modernization. A close second is California, which led efficiency efforts in three areas: buildings, transportation, and appliances. These leaders are followed by Rhode IslandVermontConnecticut, New York, Oregon, Minnesota, Washington, and Maryland.
  • More states pushed for zero-energy construction (buildings that produce as much power as they use) largely through tougher building codes.  Vermont, Rhode Island, Oregon, Washington, the District of Columbia and Massachusetts have incorporated net zero-energy construction into long-range plans.

Massachusetts’ Governor Charlie Baker said: “We are proud Massachusetts leads the nation in energy efficiency for the eighth year in a row, and we will continue to adopt and pursue measures that deliver billions of dollars in savings to our residents and businesses each year. Massachusetts remains committed to leveraging energy efficiency and clean energy to meet climate goals, reduce costs and grow the Commonwealth’s economy.”

Preview the ACEE 2018 State Energy Efficiency Scorecard

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Amherst College Science Center | Pumped Glycol Energy Recovery System

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Project Name: Amherst College Science Center
 Architect: Payette Associates Inc.
Mechanical Engineer: Van Zelm Engineers
Mechanical Contractor: Harry Grodsky & Company
Equipment: Glycol Energy Recovery System with 20 AHU coils, 16 HRU Coils and Steam Humidifier
Manufacturer: Konvekta
DAC Sales Engineer: Rich Clarke

Project Overview:

During the past 15 years, enrollment in STEM classes increased 85 percent and to meet this demand, Amherst College has built its new Science Center.

In Fall 2018, the school opened the four-story, 250,000-square-foot New Science Center with state-of-the-art teaching and research facilities. The center includes a science commons that unites the five wings of the building.  It also includes classrooms, teaching labs, a library, café and informal learning areas for students. In addition to the new building, improvements were made to the infrastructure that serves the building as well as the Greenway Dorms. These upgrades include chilled beams in all laboratory spaces, radiant ceiling panels in offices and classrooms, displacement ventilation in all non-lab areas, radiant heating/cooling floor system in the atrium area, a high efficiency glycol run-around system, daylight dimming capability in all areas with natural light, and a storm water recycling system.
Learn more about the Science Center

Designed with Sustainability in Mind

Amherst gathered a world-class team of industry leaders to design a new type of science building. Leveraging new technologies, our team of architects, engineers and sustainability experts developed sophisticated solutions, using computational modeling to explore various options and refine the designs. Their resulting innovations set the stage for the Science Center to perform at an unparalleled level of energy efficiency. The average science building uses about 370 kiloBTUs per square foot per year. We intend to reduce that by 73 percent or more through a variety of features: highly efficient systems for everything from the building HVAC down to individual lab hoods; a state-of-the-art insulating building envelope; and careful floor plan design so that sensitive and specialized lab systems are grouped together.

Konvekta:   Unique Cost Transparency Concerning Energy Efficiency 

The HVAC system at the Amherst College Science Center was supplied by Konvekta and incorporates their glycol heat recovery units

Konvekta AG, founded in 1949, is one of the leading manufacturers of air/liquid lamellar heat exchangers.   The heat exchangers are custom designed for each application and manufactured in Switzerland.   They are primarily suitable for utilization in HVAC energy recovery.

Dartmouth College Burke Hall - Konvekta System

The Konvekta system is based on three core elements of a high-efficiency energy recovery system at their disposal:

• Highly efficient heat exchanger

Hydraulic assembly unit

System Controller – After installation of a Konvekta heat recovery system, the system controller continuously records the system operating parameters and transmits the data via the internet to Konvekta headquarters in Switzerland.  The Syskom software calculates the investment cost as well as the annual operating cost of entire HVAC systems (air-conditioning system, refrigeration plant including re-cooling). Depending on the customer’s interests, the system can be optimized through changes in operating conditions and variations of components. This computing service is free of charge for Konvekta customers.

Konvekta Pumped Glycol Coil

Konvekta Energy Recovery Coil

 

 

 

 

 

 

 

Featured Manufacturer:
Konvekta

For More Information - askRick