Working with trends report - Johnson Controls - LIT-12013036 - OpenBlue Central Utility Plant - OpenBlue Central Utility Plant - v2023.Q3

OpenBlue Plant Optimizer Administration and User Guide

Johnson Controls
Product name
OpenBlue Central Utility Plant
Document type
Administration Guide
User Guide
Document number
Revision date

Create a trends report to view and export 15-minute interval trends for key performance indicators (KPIs).

About this task

The data retrieval type for the KPI is a snapshot of the value at the time of the solver run that began at the time stamp associated with that KPI value. The KPI value associated with a time stamp is intended to represent the value for the next 15 minutes following the time stamp, but it is not a calculated weighted average over that 15-minute period following the time stamp.
Note: For measurement periods that are longer than a week, the KPI value is an hourly rolled up interval trend. The hourly value is a calculated weighted average, and the weight is the minutes that a value is active.

To create a trends report, complete the following steps:


  1. In the navigation bar at the top of the page, click History and select Trends from the menu.
  2. From the Performance Measurement list, select a performance measurement:
    Table 1. Trends performance measurement
    Name Description
    Production Plots a trend of power output for a selected energy type, such as electricity, chilled water, hot water, and steam, that is produced by the selected equipment or grouping of equipment, during a user-specified measurement period.
    Consumption Plots a trend of utilities usage for a selected utility type, such as electricity, natural gas, steam, water, chilled water, and hot water, that is consumed by the selected equipment or grouping of equipment during a user-specified measurement period.
    Site CoP Plots a trend of the total system-wide efficiency in coefficient of performance (CoP). See Table 1 for details of site performance calculations.
    Chilled Water CoP Plots a trend of the coefficient of performance (CoP). The ratio of useful heating or cooling output to the required energy input for a selected equipment or grouping of equipment, during a user-specified measurement period. This dimensionless value is an energy efficiency metric that can be reported at the equipment level, the plant level, loop level where the grouping of multiple plants serves a common distribution loop, or campus level where all plants are grouped. The maximum theoretical CoP is 8.8, although it generally ranges from 2.0 to 6.0 for commercial HVAC systems or equipment.
    Specific Efficiency Similar to the Efficiency plot, Specific Efficiency plots a trend of the efficiency percentage for a specific piece of heating or power generation equipment; or heating or power generation plant. See Table 1 for available specific efficiency reports. See Table 1 for details of specific efficiency calculations.
    Efficiency Plots a trend of the efficiency percentage for heating equipment, power generation equipment, heating plants or power generation plants. See Table 1 for details of efficiency calculations.
    Utilization Plots a trend of the percentage ratio of power production relative to nominal power capacity for a selected energy type, and for a selected equipment or grouping of equipment, during a user-specified measurement period.
    Greenhouse Gas Emissions Plots the greenhouse gas emissions associated with each utility supplier or the total of all utility suppliers.
    Cost Plots a trend of utility cost for electricity, greenhouse gas, water, total consumption cost, and total supplier cost at site level and plant level, in $/hr, for selected equipment, or grouping of equipment, during a user-specified measurement period. These are supported by both 15 minute data for small date ranges, and hourly data for long date ranges.
    Load Coil Plots a trend of the loads served by the central utility plant, including chilled water, hot water, condenser water, steam, or electricity loads. A load coil is a modeling abstraction that represents all the end-use equipment that make up the total heating or cooling load on a loop, or that make up the total non-plant electricity use in the buildings. One type of load coil is a producer load coil, which transfers heat in the opposite direction of a regular load coil. For example, when cooling coils are fed directly by condenser water, the condenser water producer coil creates a condenser water load that is transferred to cooling towers. The load plotted for a load coil object represents the hourly heating or cooling needs of all the coils, such as air handling units, fan coil units, and other terminal units that are served by the central plant on that loop. The report may plot each independent loop served by its own set of pumps as a separate load coil object.
    Input vs Output Temperature Plots a trend of input and output temperature for a chilled, hot water loop, or for a primary equipment device such as a chiller. You can select up to two equipment or load coil loop items to plot.
    Operating Mode Plots a trend for CUP operating modes such as Auto, Advisory, Unavailable, and Missing Data periods.
    Storage Production Plots the discharging power as positive value and charging power as negative value for energy storage resources, during a user-specified measurement period.
    Weather Data Plots weather actual and prediction data for dry bulb temperature, wet bulb temperature, or cloud cover. Past prediction data displayed is the 12 hours ahead prediction.
  3. For Production, Consumption, and Utilization only: Select from the Energy Produced or Production Resource list.
  4. From the Equipment list, select the equipment in your system that you want to include in the report. You can select up to four items of equipment.
  5. From the Start Date and End Date calendars, enter a start date and an end date.
  6. Click Generate Chart.

    Use the Print and Download icons in the top right of the chart to print or download the generated chart. You can download the chart in PNG, JPEG, SVG, PDF, or CSV format.

  7. Optional: Click Add Chart to create additional trend charts.