VEA Recommendations

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VEA Recommendations by Mind Map: VEA Recommendations

1. Building Scheduling

1.1. On average, it appears that the building becomes active x.xx hours before occupancy and shuts down y.yy hours after occupancy ends. This indicates that the building is active for an unnecessarily long time during the course of a typical day.

1.1.1. Optimize Scheduling

2. HVAC

2.1. The building starts cooling at an abnormally low temperature of xxF indicating that the building is using mechanical cooling when the outdoor air temperature is conducive to economizing and/or free cooling.

2.1.1. Install Economizers for Free Cooling

2.2. This building has a dramatic energy consumption increase over a relatively short temperature band. This indicates that the economizer and associated controls need to be adjusted.

2.2.1. Adjust Economizers for Free Cooling

2.3. This building has dramatic reaction to change in outdoor air temperature indicating that the amount of outdoor air being taken in by the HVAC system should be reassessed.

2.3.1. Adjust Percent of Outdoor Air Brought into Building through HVAC

2.4. This building has high ventilation rates during unoccupied hours when the building is not being used, causing an unnecessary increase in energy consumption.

2.4.1. Implement Demand Controlled Ventilation and Occupancy-Based HVAC Controls

2.5. This building is using a higher than expected amount of energy to meet its predicted cooling needs. The summer average power density for cooling during occupied and unoccupied hours is approximately a.aa W/ft2 and b.bb W/ft2 respectively whereas c.cc W/ft2 and d.dd W/ft2 for occupied and unoccupied would be considered efficient for this building.

2.5.1. Upgrade Cooling System/Chiller to Higher Efficiency

2.5.2. Implement Chiller Staging

2.5.3. Reset Chilled Water Temperature

2.5.4. Implement/Adjust Variable Air Volume (VAV) System

2.6. This building is using a higher than expected amount of energy to for space heating: a.aa W/ft2 whereas b.bb W/ft2 would be considered efficient for this building.

2.6.1. Install/Adjust Heat Recovery Devices

2.6.2. Prevent Rapid Boiler Cycling

2.6.3. Reset Boiler Temperature

2.6.4. Install/Adjust Boiler Combustion Controls

2.6.5. Complete Regular Steam Trap Surveys

2.6.6. Improve the efficiency of the steam heat exchanger

2.6.7. Upgrade Heating System/Boiler to Higher Efficiency

2.7. This building is using a higher than expected amount of energy to meet its predicted pumping requirements. The annual average pump energy use is approximately a.aa W/ft2 whereas b.bb W/ft2 would be considered efficient for this building.

2.7.1. Install VFDs on Pumps or Re-size Pumps

2.8. The observed normalized variability of this building during the transition temperature band (°F to °F) in the shoulder seasons was approximately a% compared to an expected b% variability for an efficient building.

2.8.1. Minimize Simultaneous Heating and Cooling / Control Reheat Units During Cooling Season

2.9. The summer gas/steam consumption has a high constant minimum usage (a.a% of the total summer consumption). This indicates an excessive usage of water heating during summer, unnecessary reheat or humidification, or leakages.

2.9.1. Assess gas/steam for water heating to determine if usage can be reduced

3. DHW

3.1. Inefficiencies have been detected in Domestic Hot Water system while demand is minimal indicating that the system may be wasting energy while the building is unoccupied.

3.1.1. Eliminate Standing Heat Losses from DHW System

3.2. When the building is occupied, the amount of energy used for Domestic Hot Water is high (x.xx kbtu/ft2 where as y.yy kbtu/ft2 would be efficient), aluding to inefficiencies detected in Domestic Hot Water production system during normal building operations.

3.2.1. Improve Operating Efficiency of Domestic Hot Water System

3.3. The summer gas/steam consumption has a high constant minimum usage (a.a% of the total summer consumption). This indicates an excessive usage of water heating during summer, unnecessary reheat or humidification, or leakages.

3.3.1. Assess gas/steam for DHW to determine if usage can be reduced

4. Lighting

4.1. Based on the Annual Average Power Density for Lighting during unoccupied hours, it appears as though the building's lighting systems are not optimally controlled resulting in unnecessary energy usage to illuminate unused spaces.

4.1.1. Install/Optimize Lighting Controls

4.2. The Annual Average Power Density for lighting is approximately x.xx W/ft2 whereas y.yy W/ft2 would be considered efficient for this building, indicating that lighting systems may be outdated and inefficient.

4.2.1. Retrofit to More Efficient Lighting Fixtures

5. Plug Loads

5.1. It appears that the plug loads of this building are greater than expected. The annual average power density for plug loads is approximately a.aa W/ft2 whereas b.bb W/ft2 would be considered efficient for this building.

5.1.1. Upgrade to Energy Efficient Equipment

5.2. The annual average power density for plug loads during unoccupied hours is approximately a.aa W/ft2 whereas b.bb W/ft2 would be considered efficient for this building.

5.2.1. Improve Computer Power Management

5.2.2. Install Vending Machine Controls

5.2.3. Install Occupancy Sensors on Miscellaneous Equipment

6. Refrigeration

6.1. The summer gas/steam consumption has a huge baseload (a.a% of the total summer consumption). This indicates an excessive usage of water heating during summer, unnecessary reheat or humidification, or hot water leakages.

6.1.1. Assess gas/steam baseload during cooling season to determine if usage can be reduced

7. Envelope

7.1. This building has dramatic reaction to change in outdoor air temperature

7.1.1. Reduce Air Infiltration

7.1.2. Add Insulation

8. Baseload

8.1. High electric baseload

8.1.1. Implement cable management

8.1.2. Hot aisle/cold aisle separation and containment

8.1.3. Optimize supply/return configuration

8.1.4. Raise cooling temperature setpoint