BUILDING ENERGY SOLUTIONS AND TECHNOLOGIES
Copyright © 2008 Building Energy Solutions and Technology
TECHNOLOGIES
In recent years, there have been revolutionary changes in HVAC technology, ranging from energy-efficient measures and strategies for HVAC component units or integrated systems to physical model development, calibration and application. All of these engineering innovations are based on sound theories of thermodynamics, heat transfer, fluid dynamics, system control and mathematical optimization, and also proved by implementation or application to physical buildings or facilities with a great amount of energy reduction as demonstrated in case studies.
For example, a variable frequency drive (VFD) can maintain the required static pressure at the fume hoods by modulating the fan speed. The VFD reduces the fan power and eliminates the noise problems. The application of the VFD in non-makeup air exhaust systems can potentially reduce annual fan energy by as much as 51%. The energy saving from optimal cold deck and hot deck reset schedules in multi-zone building should be at least 75% of the maximum potential savings. Implementation of several new HVAC control technologies, such as nighttime airflow reset schedule, main duct static pressure reset schedule, volume tracking return fan control schedule, and a variable primary chilled water flow schedule can reduce HVAC electricity consumption by 40% annually.
The purpose for providing technical descriptions of available technologies and processes is to demonstrate how Bes-Tech can help your company reduce energy consumption, as well as maintenance and operation costs. Bes-Tech’s researchers and engineers have been working diligently for the past decade, through research and development, to save energy and increase comfort levels.
The following technical papers cover the three areas of the technological advances in HVAC systems.
Engineering Innovation
• An Energy-Efficient Fan System for Dual-Duct Constant Volume Air-Handling Units
• Optimal Operation and Control of Heat Recovery System in the Laboratory Air Handling Unit System
• Integrated Air Handling Unit System for Large Commercial Buildings
• Development of In-situ Fan Curve Measurement for VAV AHU Systems
• Variable Frequency Drive Applications in Non-makeup Air Exhaust Systems
• Two Energy Efficiency Measures for “Constant Air Volume Exhaust Systems”: Damper and Variable Speed Drive
• Retrofit Constant Speed Fan Laboratory Exhaust Systems Using Multi-Stack and Variable Speed Drive Techniques
• An On-line Self-tuning Algorithm of PI Controller for Heating and Cooling Coils
• Energy Performance Analysis of Coupled-Control Units with Both Thermostat and Humidistat
• Variable Speed Drive Volumetric Tracking for Airflow Control in Variable Air Volume Systems
• An Air Filter Pressure Loss Model for Fan Energy Calculation in Air Handling Units
• Simplified Building and Air-Handling Unit Model Calibration and Applications
• Application of On-line Simulation for Building Energy System Fault Detection
• Optimize the Supply Air Temperature Reset Schedule for a Single-Duct VAV System
• Terminal Box Airflow Reset: An Effective Operation and Control Strategy for Comfort Improvement and Energy Conservation
• Integrated Chiller System Reduce Building Operation and Maintenance Costs in Cold Climates
• The Maximum Potential Energy Savings from Optimizing Cold Deck and Hot Deck Reset Schedules for Dual-Duct VAV Systems
• Integrated Damper and Pressure Reset for VAV Supply Air Fan Control
• Single-Duct Constant Air Volume System Supply Air Temperature Reset: Using Return Air Temperature or Outside Air Temperature?
• Calibrating AHU Models Using Whole Building Cooling and Heating Energy Consumption Data
• Converting Dual Duct Constant Volume Systems to Variable Volume Systems Without Retrofitting the Terminal Boxes
• Use EMCS Data to Identify Savings
• An Advanced Economizer Controller for Dual Duct Air Handling Systems with a Case Application
Optimal HVAC
• By-pass Blending Station-An Innovative Secondary in-Build Pump System for District and Cooling Systems
• Use of EMCS Recorded Data to Identify Savings Due to Improved HVAC Operation & Maintenance (O&M)
• Impacts of Static Pressure Set Level on the HVAC Energy Consumption and Indoor Conditions
• Optimizing HVAC Control to Improve Building Comfort and Energy Performance
• Variable Water Flow Pumping for Central Chilled Water Systems
CC Technology and Implementation
• Implementation and Demonstration of Continuous Commissioning Leading Energy Retrofit Process
• Improving Building Energy System Performance by Continuous Commissioning
• A Comprehensive Continuous Commissioning Improve Building Comfort and Reduce Building Energy Consumption - A Case Study
• Application of Innovative Technologies during Continuous Commissioning
First Data Corporation
Terrace Plaza
Brooke Army Medical Complex
Fairview Medical Center
Regency Center
OPPD Energy Plaza
List of Selected Projects
For example, a variable frequency drive (VFD) can maintain the required static pressure at the fume hoods by modulating the fan speed. The VFD reduces the fan power and eliminates the noise problems. The application of the VFD in non-makeup air exhaust systems can potentially reduce annual fan energy by as much as 51%. The energy saving from optimal cold deck and hot deck reset schedules in multi-zone building should be at least 75% of the maximum potential savings. Implementation of several new HVAC control technologies, such as nighttime airflow reset schedule, main duct static pressure reset schedule, volume tracking return fan control schedule, and a variable primary chilled water flow schedule can reduce HVAC electricity consumption by 40% annually.
The purpose for providing technical descriptions of available technologies and processes is to demonstrate how Bes-Tech can help your company reduce energy consumption, as well as maintenance and operation costs. Bes-Tech’s researchers and engineers have been working diligently for the past decade, through research and development, to save energy and increase comfort levels.
The following technical papers cover the three areas of the technological advances in HVAC systems.
Engineering Innovation
• An Energy-Efficient Fan System for Dual-Duct Constant Volume Air-Handling Units
• Optimal Operation and Control of Heat Recovery System in the Laboratory Air Handling Unit System
• Integrated Air Handling Unit System for Large Commercial Buildings
• Development of In-situ Fan Curve Measurement for VAV AHU Systems
• Variable Frequency Drive Applications in Non-makeup Air Exhaust Systems
• Two Energy Efficiency Measures for “Constant Air Volume Exhaust Systems”: Damper and Variable Speed Drive
• Retrofit Constant Speed Fan Laboratory Exhaust Systems Using Multi-Stack and Variable Speed Drive Techniques
• An On-line Self-tuning Algorithm of PI Controller for Heating and Cooling Coils
• Energy Performance Analysis of Coupled-Control Units with Both Thermostat and Humidistat
• Variable Speed Drive Volumetric Tracking for Airflow Control in Variable Air Volume Systems
• An Air Filter Pressure Loss Model for Fan Energy Calculation in Air Handling Units
• Simplified Building and Air-Handling Unit Model Calibration and Applications
• Application of On-line Simulation for Building Energy System Fault Detection
• Optimize the Supply Air Temperature Reset Schedule for a Single-Duct VAV System
• Terminal Box Airflow Reset: An Effective Operation and Control Strategy for Comfort Improvement and Energy Conservation
• Integrated Chiller System Reduce Building Operation and Maintenance Costs in Cold Climates
• The Maximum Potential Energy Savings from Optimizing Cold Deck and Hot Deck Reset Schedules for Dual-Duct VAV Systems
• Integrated Damper and Pressure Reset for VAV Supply Air Fan Control
• Single-Duct Constant Air Volume System Supply Air Temperature Reset: Using Return Air Temperature or Outside Air Temperature?
• Calibrating AHU Models Using Whole Building Cooling and Heating Energy Consumption Data
• Converting Dual Duct Constant Volume Systems to Variable Volume Systems Without Retrofitting the Terminal Boxes
• Use EMCS Data to Identify Savings
• An Advanced Economizer Controller for Dual Duct Air Handling Systems with a Case Application
Optimal HVAC
• By-pass Blending Station-An Innovative Secondary in-Build Pump System for District and Cooling Systems
• Use of EMCS Recorded Data to Identify Savings Due to Improved HVAC Operation & Maintenance (O&M)
• Impacts of Static Pressure Set Level on the HVAC Energy Consumption and Indoor Conditions
• Optimizing HVAC Control to Improve Building Comfort and Energy Performance
• Variable Water Flow Pumping for Central Chilled Water Systems
CC Technology and Implementation
• Implementation and Demonstration of Continuous Commissioning Leading Energy Retrofit Process
• Improving Building Energy System Performance by Continuous Commissioning
• A Comprehensive Continuous Commissioning Improve Building Comfort and Reduce Building Energy Consumption - A Case Study
• Application of Innovative Technologies during Continuous Commissioning
CASE STUDIES
First Data Corporation
Terrace Plaza
Brooke Army Medical Complex
Fairview Medical Center
Regency Center
OPPD Energy Plaza
List of Selected Projects