Elara Reduces Utility Costs by $116,000 for New Orleans Hotel
Based on a recommendation from Elara Engineering’s Energy Audit and HVAC/Mechanical Systems Assessment of the Renaissance Pere Marquette Hotel, Elara recently completed a chiller plant replacement and chiller heat recovery implementation project that reduced utility costs by $94,000 within the first 10 months of operation (projected at $116,000 annually). Elara’s assessment identified additional improvement opportunities with a potential to reduce the hotel’s operating costs up to an additional estimated $125,000 per year.
The Pere Marquette Hotel, an 18-story luxury hotel located in New Orleans’ historic French Quarter was originally constructed in 1925, renovated in 2001, and underwent repairs to the base building after Hurricane Katrina in 2005. The property has 275 guest rooms, restaurant, café, fitness center, banquet and conference facilities, offices, and a parking garage.
Due to costly, repeated issues with compressor failures, an upgrade of the hotel’s existing chilled water plant was identified as a priority project within Elara’s assessment report. Upon approval from the owner to implement the first of its recommendations, Elara;
- Designed and replaced three existing air-cooled rooftop chillers with two cooling-only chillers and one heat recovery chiller to preheat the domestic hot water using waste heat while improving the chiller’s efficiency,
- Designed the replacement in phases to minimize building systems downtime and allow the hotel to remain operational,
- Converted one of the building’s existing three domestic hot water storage tanks to a preheat tank associated with the new heat recovery chiller, and
- Installed a new heat exchanger and pump along with associated controls.
Elara Engineering Introduces New Collaborative Workspace
As part of Elara Engineering’s ongoing strategy to identify the best possible technologies, processes, training and work environment to continuously generate innovative, cutting-edge designs that improve the functionality of both new and existing buildings, Elara recently reconfigured one of its workspaces to further enhance staff communication, collaboration, and teamwork.
Defined by its guiding principles of Big Picture Thinking, Practical Approach, and Sustainable Designs, Elara has created a workspace that gives its talented and dedicated professionals the freedom and flexibility – including the opportunity to easily work as a group, when desired -- to analyze, problem solve, and innovate in a comfortable work environment. With its open-office layout, dedicated small group meeting spaces, open table-tops for group discussions around client plans and drawings, writeable walls, and adaptive sit-stand desks for increased comfort; communication channels are shortened, project issues and opportunities are identified and resolved faster, and project quality and efficiency are improved.
Elara Engineers Design and Facilitate Hands-On Experiment for Loyola University Chicago Engineering Course
Using an energy-efficient, radiant heating/cooling technology that Elara designed for Loyola University Chicago’s Cuneo Hall (a Gold LEED-Certified building that was in the Top 5% of U.S. energy-efficient classroom buildings when it opened in 2012), Loyola’s Dr. Gail Baura, PhD; Director of Engineering Science and Dr. Jason Streeter, PhD; Clinical Assistant Professor recently facilitated an Elara developed learning experience for a group of engineering students (ENGR 201, Experiential Engineering).
Created by Elara’s Don McLauchlan and additionally facilitated by Brian Malone, Associate Principal; the experiment investigated radiant technology that incorporates several BEKA capillary tube mats installed in groups in each of Cuneo Hall’s classrooms to achieve the following learning objectives:
- How to apply the First Law of Thermodynamics,
- How to use control volumes to analyze systems, and
- How to estimate radiative heat transfer.
The small-group, hands-on experiment is consistent with the objectives of Loyola’s Engineering Science Program that emphasize active learning to facilitate student engagement and engineering retention. Elara was honored and appreciated the opportunity to provide its expertise and insight for tomorrow’s engineering professionals.
Don McLauchlan, PE, CEM, LEED AP, is a Principal of Elara Engineering and a member of the Engineering Science Industrial Advisory Board for Loyola University Chicago’s Engineering Science Program. Additional information about Loyola’s Engineering Science Program can be found here.
Elara Earns 22nd Excellence in Engineering Award
In December of 2017, Elara Engineering received an Illinois Chapter ASHRAE Excellence in Engineering Award for its energy retrofit project at The Residence at Water Tower Place in Chicago’s Streeterville neighborhood (180 East Pearson Street). This latest recognition represents Elara’s 22nd Chapter-Level ASHRAE award since the company’s inception in 2001.
The innovative project, further highlighted in the Autumn Issue of Chicagoland Buildings & Environment (access the article) and led by Don McLauchlan and Ryan Hoff, reduced energy costs by 50% and improved occupant comfort through a design approach that re-established centralized humidification and improved building pressurization. Additional details about the project can be found here.
Mechanical Upgrade of Library Protects Rare Book Collection and Lowers Energy Bills
Elara Engineering has completed a mechanical, electrical, and fire alarm retrofit of Loyola University’s historic Cudahy Library located on its Lake Shore Campus in Chicago, Illinois.
The MEP upgrade of the 3-story building, originally constructed in the 1920s, will dramatically reduce energy costs while installed systems to control temperature and humidity will help protect and further preserve the life expectancy of the 12,600+ rare books housed in the Archives and Special Collections department of the Library. The prized collection reflects the liberal arts foundation of Loyola University in the areas of Philosophy, Religion, History and Geography, and Language and Literature.
To achieve the project’s objectives, Elara:
- Converted the building from costly electric resistance heating to hot water heating fed by the Campus’ high efficiency hot water plant.
- Replaced aged and noisy Air Handling Units (AHUs) that provided insufficient humidity control with new custom consolidated VAV and heat pump systems which incorporated energy recovery, including the innovative installation of new fan powered boxes with hot water reheat coils designed to circulate chilled water during cooling to act, in essence; as active chilled beams.
- Installed a new heat pump system with a fluid cooler for the Library’s book stack area and waterside economizer for fan powered boxes via heat exchanger.
- Replaced existing pneumatic control system with a new state-of-the-art Direct Digital Control building automation system tied to the Campus’ network.
- Upgraded the building’s main electrical panel and fire alarm system and modified the electrical infrastructure to support the new and upgraded mechanical systems.
Maine Township High School District 207 to Receive $260,270 in Utility Incentives for Central Plant Upgrades
As a result of Elara’s design to replace and upgrade the existing central plants serving Maine South High School and Maine West High School, Maine Township High School District 207 has been approved to receive $260,270 in incentive funding due to the demonstrated energy efficiency of the new central plants.
Through the initial stages of a master plan for the entire School District, Elara identified the opportunity to convert the existing inefficient heating system serving Maine West High School from low pressure steam to hot water heating fed by a high-efficiency condensing hot water boiler plant and to install a new dedicated domestic hot water and pool heating plant. This work included replacement of the existing steam absorption chillers with new high-efficiency electric chillers, upgrade of ten air handling units, and the elimination of nine heat exchangers.
Elara similarly identified the opportunity to replace the existing high temperature/high-pressure hot water boiler plant at Maine South with a new high-efficiency condensing boiler heating plant and to install new dedicated domestic hot water and pool heating plant. This work included the elimination of ten heat exchangers and the consolidation of the space heating boiler plants. Also as part of the central plant upgrade project, new state-of-the-art direct digital control building automation systems were also installed to replace existing pneumatic controls at both high schools.
Additional benefits of Elara’s central plant upgrade design include replacing aged equipment in need of repair with new higher efficiency equipment with lower operating costs, reducing maintenance through the elimination of equipment, and improving comfort through state-of-the-art controls. The projects were completed on-time and under budget with $260,270 ($159,639 for natural gas; $100,631 for electric) in incentive funding approved through local utility companies.
Elara Designs Geothermal Heating & Cooling System for Eastland Elementary School
As part of its heating and ventilation system evaluation for Eastland Elementary School for Community Unified School District (CUSD) 308 in Lanark, Illinois, together with Richard L. Johnson Associates Architects, Elara recommended improvements to the school’s existing HVAC system to address aging equipment, increase energy efficiency, and enhance occupant comfort. One improvement strategy included the design and installation of a Geothermal Heat Pump System for centralized space heating and cooling for the building.
The geothermal system designed by Elara was installed for an incremental cost of less than 10% of that to install a conventional heating and cooling system. Additionally, this environmentally-friendly approach is more energy efficient and eliminates future costs to replace central boiler and chiller plants approximately every 20 years. The system’s geothermal field, with its 36, 450-foot deep vertical wells is anticipated to last at least 50 years, with heat pump equipment replaced according to a traditional schedule.
For the system installation, a single pipe geothermal condenser water loop was utilized to serve the classroom heat pumps and to save material and labor costs of pipes routed through an existing utility tunnel. Elara also re-used two existing mezzanines above the gymnasium’s stage area to house new heat pump air handling equipment. Once Elara unified the HVAC systems for the building (which were previously disjointed due to numerous renovations and additions), a new direct digital control system was installed to maximize controllability and energy savings associated with the operation of the new equipment.
Elara Improves Comfort and Reduces Energy Costs by 50%
The Residence at Water Tower Place Condominium Association retained Elara Engineering to perform a holistic review of the building’s ventilation system to identify opportunities to improve performance, reduce energy consumption, and to improve occupant comfort. The following two-fold design approach reduced energy costs by 50% ($210,000 over the first eight months of operation) and improved occupant comfort through upgrade of the building’s central ventilation systems including reestablishing central humidification and improving building pressurization.
Intelligent Ventilation Control
Demand Controlled Ventilation (DCV) with dampers behind each condominium unit’s exhaust grille that open when exhaust is required (morning, evening) and close when not needed (mid-day, overnight) was utilized to:
- Reduce Fan Power to save significant energy,
- Improve Building Pressurization to reduce air and water infiltration, drafty conditions, and stack effect, and
- Reduce Makeup Air Volume to save significant energy.
Optimization of Makeup Air Unit Performance
Once the building’s exhaust and makeup air systems were operating intelligently, the Makeup Air Units (MAU) were improved by converting the ventilation system to an intelligently controlled demand oriented system, converting existing electric MAUs to gas, and adding three forms of heat recovery.
Elara Client Awarded $100,000 Solar Array Grant
In collaboration with Indian Trails Public Library (ITPL) , Elara Engineering completed and submitted an EBSCO Industries, Inc. (EBSCO) Solar grant application to offset the installation costs of a solar panel array to further reduce the Library’s annual electricity expenditures. EBSCO received 90 submissions from 15 countries for the 2017 grant.
Elara’s energy modeling experts provided the following information and data for the grant application submittal:
- Computation of solar accommodating roof area according to calculated shade lengths of existing roof elements during winter solstice.
- Modeling and computation of panel inclination angle of highest photovoltaic efficiency.
- Modeling of solar building performance, including thermal imaging of building exterior and solar inclination angles.
- Comprehensive schematic descriptions of sustainability projects already completed for the Library:Geothermal Heating and Cooling
- Energy Recovering Dedicated Outdoor Air Handling Units
- Variable Air Volume Terminals with Demand (occupancy sensing) Control and Automation
- LED Efficient Lighting
- Conversion of backup generators to natural gas.
- Review of local roofing and electrical building code requirements
Congratulations to Indian Trails Public Library for its ongoing dedication to environmental sustainability, including its strong commitment to the use of renewable energy sources.
Elara's Enhanced Commissioning Supports LEED Gold Designation of State-of-the-Art Research Facility
With LEED Enhanced Commissioning services and expertise, Elara successfully secured valuable points to ensure a highly desired LEED Gold designation for Loyola University's newly constructed Center for Transitional Research and Education facility (CTRE). The highly specialized, highly complex 5-story state-of-the-art research facility required an extreme level of systems redundancy and continuous mechanical system service to ensure uninterrupted medical research. To serve a wide range of space uses, the building included multiple sophisticated mechanical systems; including, emergency chilled water fed from the University's Health Science Campus and over 650 air terminal units.
Through coordinated commissioning activities that included comprehensive functional testing, the identification of control sequencing modifications and reliability enhancements -- considered to be of critical importance for lab space performance, and black out testing to verify emergency power functionality and emergency sequences for MEP systems throughout the building, Elara delivered a highly efficient building system with complete functionality.
Renovated Building and New Addition Uses 40-50% Less Energy
Elara Engineering recently completed a mechanical, electrical, plumbing and fire protection design for the renovation and expansion of Indian Trails Public Library in Wheeling, Illinois that is projected to result in a 40-50% reduction in energy use relative to other, typical library buildings. This sustained benefit was primarily derived from the innovative use of a geothermal heat pump heating and cooling system combined with energy efficient building materials and features.
The design team’s work addressed several issues impacting the original two-story building, including; substantial energy costs, poor indoor air quality, and outdated mechanical equipment. To correct this, the design team:
- Designed a new energy efficient mechanical system (geothermal heating/cooling heat pumps that generate hot and chilled water to serve fan coil units and VAV boxes within the occupied spaces) and digital controls for the new and renovated spaces
- Developed new power, lighting and emergency/egress lighting systems to support the new and renovated spaces
- Modified and expanded the existing fire alarm, plumbing and fire protection systems for the new and renovated spaces.
Elara Engineering Procures $164,685 in Incentive Funding for Chicago Client
Identified in a Master Plan that Elara had developed for the owners of “The Fields” building at 4000 West Diversey Avenue in Chicago, Elara’s engineering team conceptualized and designed a demand controlled ventilation (DCV) system that provided $164,685 in incentive funding with an estimated $157,000 in annual energy cost savings.
The DCV system for the 700-space indoor parking garage supports the conversion of the former Marshall Field & Company warehouse into a multi-use facility that includes high-tech loft live/work apartments, a grocery store, and loft style office spaces. This work, along with Elara’s specifications for new burner controls including linkage-less high-turndown burner retrofits for the building’s existing primary steam boiler, greatly improved energy efficiency, occupant comfort, and overall system reliability.
Elara Engineering Contributes to Successful Highland Park HS & Deerfield HS Renovation Project
“We could not have done this without a solid team. Many thanks to the Gilbane, Elara, Perkins + Will and all the contractors that worked on this project!!”
Daniel Mortensen, CPMM
Director of Facilities Management
Township High School District 113
In a recent article in the Daily North Shore highlighting the work at the District’s Highland Park High School, Mr. Mortensen indicated that the most challenging part of the effort was the multi-year phasing of the project. “We wanted to ensure that the construction activities would not have a negative impact on the learning environment over the four years of ongoing construction.” He further stated that the four-year project is ahead of schedule. The project was initially targeted for completion in August of 2018. “The project is not closed out yet, but we are currently under budget and we’re anticipating it being 100 percent complete in August of 2017.”
Additional details about the Highland Park High School renovation project can be found in the Daily North Shore article at (https://jwcdaily.com/2017/03/13/hphs-unveils-21st-century-learning-renovations/).