Cadillac® Energy CU-E Meter

Cadillac® Energy CU-E Meter – Applications

The Cadillac® Energy CU-E Meter is the meter of choice for energy applications. This meter can be applied effectively for the following purposes:

• Energy consumption data source for energy management system, DCS, district-wide systems.
• Basis for internal cost estimation using campus-wide systems.
• Efficiency measuring and monitoring from central control rooms.
• Direct Energy / BTU measurements at both Boiler and point of use locations.

Cadillac® Energy CU-E Meter – Features

The Cadillac® Energy CU-E Meter is the meter of choice for energy applications. This meter contains the following features:

• Heating Mode: Where Positive ΔT’s only are totalized.
• Cooling Mode: Where Negative ΔT’s only are totalized.

Cadillac® Energy CU-E Meter — Operation Principles

The Cadillac® CU-E BTU / Energy Meter measures the temperature in the feed and return lines via two RTD sensors/transmitters and from this calculates the density and enthalpy of the water. In addition, by also measuring the volume of water flowing in the system via the Cadillac® flow meter, the CU-E will then compute, display, and output the Energy consumed.

Power is Calculated:

• P = V x p x (htv-htr)

Where:

• P = Power (watts)
• V = Volumetric flow Rate
• p = Density
• htv = Specific enthalpy at Feed temperature
• htr = Specific enthalpy at Return temperature

Cadillac®  CU-E BTU  Meter  – Dimensions

The Cadillac® CU-E BTU dimensions are outlined below:

Cadillac®  CU-E BTU  Meter – General Specifications

The Cadillac® CU-E BTU includes the following specifications:

Energy Meter

• Meter shall consist of remote electroincs, one pair of matched clamp-on transducers, and pair of matched temp trans.
• Meter available with analog (4-20 mA), digital (pulse or relay) outputs, and RS485 Modbus RTU Communications.
• Four line 16 character backlit LCD providing instantaneous Energy, totalized Energy, velocity, and operational status.
• Meter programmed via integral keypad.
• Flow range: 0 to + 40.0 ft/s (0 to + 12.0 m/s), bi-directional flow.
• Accuracy: Typically ± 2.0% of reading at rates < 1.65 ft/s (accuracy also dependent on flow profile).
• Repeatability: 0.2% of Reading.
• Temperature Range: Transducers 4° to +250°F (- 40 to 121°C), Transmitter 4° to +130°F (- 20 to 60°C)
• Meter housing: NEMA 4X (IP65), ABS plastic (standard).

Cadillac® Energy CU-E Meter – Installation

The Cadillac® CU-E BTU / Energy Meter installation instructions are outlinde in the diagram below. By implementing the CU-T Ultrasonic flow metering capability and strap-on temperature sensors/transmitters as part of the CU-E Energy System, the user eliminates the need to bring the system down for installation. With a completely non-intrusive system it allows quick and easy retrofit into an online system. With a 100:1 turn down and +/- 2.0% of the rate accuracy the CU-T flow meter provides a cost effective means to provides a flow measurement, while providing a maintenance free non-mechanical flow technology.With no moving parts or flow line obstruction the CU-T has no mechanical drift, which require re-calibration, and does no cause system head loss creating an unwanted heat source (for chilled water systems), as do all other mechanical and differential pressure flow technologies typically used.The CU-E Energy system provides a quick, easy to install, cost effective way to measure energy consumption with reasonable accuracy for the end user.

CU-E Ultrasonic Chilled/Hot Water Energy System

CU-E Water Energy System

Ultrasonic & CU-E Model Mode