Learn how Cutone & Company Consultants provides the expertise, funding and oversite to help this historic building deliver a cost saving project on time and under budget.
| Total Project Cost | Cash Incentive | Annual Cost Savings | Simple Payback |
|---|---|---|---|
|
$1,000,000 |
$500,000 |
$250,000 |
2 years |
| Equipment Life | Discount Rate | Net Present Value | %ROI |
|---|---|---|---|
|
10 Years |
3% |
$1,399,000 |
40% |
In a progressive move towards sustainability and operational efficiency, Cutone & Company Consultants spearheaded a transformative Building Management System (BMS) upgrade for a high-profile client. This case study explores the journey from identifying the need for an upgrade, through the meticulous process of data collection and analysis, to the implementation of a state-of-the-art Delta Controls System. The project not only secured over $500,000 in funding from ConEdison but is set to save the building owner approximately $250,000 annually in energy costs.
The project kicked off with Cutone & Company Consultants conducting an exhaustive evaluation of the existing BMS, which was a hybrid of Carrier packaged air conditioning systems and Daikin heat pumps. The preliminary findings revealed significant inefficiencies: numerous systems were found to be simultaneously heating and cooling, leveraging both the heat pumps and the natural gas-fired steam heat boilers. Additionally, many air conditioning units were operational beyond standard work hours, with some running 24/7.
Approximately 35 temperature data loggers were strategically installed throughout the building to establish a baseline. This crucial step enabled the team to collect and analyze operational data, laying the groundwork for the proposed upgrades.
We utilized RC-Temperature data loggers for rapid recording of temperature data across the building. These convenient devices feature a built-in display and an integrated USB interface for seamless data acquisition, storage, and transfer to your computer.
By leveraging eQuest and the collected field data, Cutone & Company Consultants successfully modeled the baseline conditions. The modeling played a crucial role in uncovering significant energy-saving opportunities and in the design of the new BMS system.
These are some of features that were aimed at maximizing operational efficiency and minimizing energy consumption.
Cutone & Company Consultants developed a bespoke algorithm to regulate the simultaneous operation of approximately 250 mutually exclusive condensing sections for daily demand limitation. During demand response events, the Building Management System (BMS) would sub-cool the building and then reset the space temperature, effectively shutting down the AC systems during the curtailment period. This algorithm enables the building to reduce its demand by over 400 kW!
“Optimum Start/Stop” is an advanced control strategy used in Building Management Systems (BMS) to enhance the energy efficiency of heating, ventilation, and air conditioning (HVAC) systems in buildings. The core objective of this strategy is to minimize energy consumption while ensuring that the building reaches the desired temperature by the start of occupancy, providing a comfortable environment for occupants. Similarly, it aims to shut down systems in an optimized manner to save energy when the building is not occupied, without compromising the indoor environment prior to the next occupancy period.
Demand Controlled Ventilation (DCV) is an intelligent ventilation management strategy integrated into Building Management Systems (BMS) to regulate indoor air quality and ensure energy-efficient operation of heating, ventilation, and air conditioning (HVAC) systems in buildings. DCV dynamically adjusts the volume of outside air ventilated into a space based on the occupancy level or the concentration of carbon dioxide (CO2) and other pollutants, thereby optimizing energy use while maintaining a healthy and comfortable indoor environment.
“Scheduling” in the context of Building Management Systems (BMS) refers to the programmed operation of building systems, such as heating, ventilation, air conditioning (HVAC), lighting, and security systems, based on a predefined timetable. This functionality allows building operators to automate the control of building environments, ensuring these systems operate only when needed, thereby enhancing comfort, efficiency, and energy savings. The scheduling feature is a fundamental aspect of modern BMS, enabling smarter, more responsive building operations tailored to the specific usage patterns and occupancy schedules of the building.
Smart thermostats were installed, limiting tenant adjustments to 2 degrees above or below the default setting. This measure prevented excessive heating or cooling, leading to energy and cost savings. Additionally, it allowed for tenant comfort flexibility without compromising energy efficiency.
Common area air conditioning systems are equipped with fixed outside air dampers. These dampers were allowing unconditioned air into the space, creating an unnecessary cooling or heating load on the building, which in turn increased operating costs. The Building Management System (BMS) now controls the new actuators to modulate the intake of outside air when the temperatures allow, providing free cooling during the shoulder months. This results in energy savings as no mechanical cooling is required under these conditions.
Originally, HVAC systems, if not left on overnight, begin operation simultaneously at approximately 9 a.m. The EMS system restricts the number of active compressors to 80% of the connected load from 8 a.m. to 2 p.m., aiming to lower kW demand and enhance the building’s load factor. Additionally, the EMS ensures that cycling off an AC unit does not cause any space temperature to surpass 74 degrees Fahrenheit.
A significant achievement of this project was the negotiation of partial fund disbursement with ConEdison. This strategic financial planning facilitated smoother cash flow management throughout the project duration.
The upgrade to the Delta Controls System is expected to yield approximately $200,000 in annual savings on electric and natural gas costs, marking a significant stride towards energy efficiency and sustainability.
The meticulous approach of collecting and analyzing operational data paid off. Cutone & Company Consultants identified multiple opportunities for deep energy savings, which were pivotal in making the project economically attractive to the building owner.
This case study showcases the importance of thorough data collection and analysis in identifying energy savings opportunities in building management systems. Cutone & Company Consultants’ strategic approach to upgrading the BMS, coupled with effective negotiation for funding, has set a benchmark for similar projects in the industry. The project not only demonstrates the potential for substantial energy savings but also highlights the economic benefits of investing in advanced BMS technologies.
Cutone & Company Consultants specializes in providing innovative solutions for energy efficiency and building automation systems. With a focus on sustainability and cutting-edge technology, the company is committed to helping clients achieve operational excellence and significant cost savings.
This publication aims to inform and inspire other professionals in the industry about the potential for energy efficiency through smart building automation upgrades. For more information on how to undertake similar projects or to consult with our experts, please contact Cutone & Company Consultants.