Hill Pavilion & Lynch Life Sciences Aircuity Pilot / Energy Program

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Evaluation

STPCx evaluated the energy savings using real-time data obtained via the existing Energy Management System (EMS) during the cooling and heating seasons. The accuracy of the data (temperature and flows) of the EMS was correlated with an actual readings taken with calibrated and certified IEQ measuring instruments. In the labs and animal holding rooms, these IEQ instruments monitor the content of particles in the air, CO2, CO, relative humidity, TVOCs (Total Volatile Organic Compounds) and space temperature. Together, the EMS and IEQ monitors log the space’s ACH, temperature, IEQ condition parameters, animal room housing loads, date(s) of bedding changes, and if any chemicals had been used / spilled in any of the areas.

Implementation

The data from these two systems generated enough information to establish a performance base-line allowing the following:

• A minimum desired point of IEQ which will become the control’s set points.
• The IEQ condition (triggering point) to initiate an air-quenching of the space to dissipate and quickly extract surges of contaminants due to spills or any unusual reasons.

Savings Model / Actual Results

Once the original base-line’ was defined, STPCx could calculate the Dynamic Variation of ACH (DV-ACH). The energy savings calculation was then compared using the systems operating on the DV-ACH and what it would have used on the normal mode. Energy Savings Calculation was based upon the following data within each space:

• Air flow in the spaces/rooms
• Outside air enthalpy (temperature and humidity)
• Air Handling Unit discharge air enthalpy (temperature and humidity)
• Spaces’ reheat unit discharge temperature
• Room temperature and if available humidity
• Energy recovered systems enthalpy exchanged
• Air pressure losses across the AHU, if not available we will assume a fixed filter and cooling coils’ loads.
• Fan’s curves efficiencies
• Heat exchangers efficiencies.
• Estimated steam line losses through the distribution system
• Estimated power losses through the distribution system.
• Average price of utilities, steam and chilled water for the different seasons cooling and heating.