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PD CEN/TR 13582:2025 Installation of thermal energy meters. Guidelines for the selection, installation and operation of thermal energy meters >
PD CEN/TR 13582:2025 Installation of thermal energy meters. Guidelines for the selection, installation and operation of thermal energy meters, 2025
- undefined
- European foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Selecting a metering device for thermal energy [Go to Page]
- Figure 1 — Thermal energy meter [Go to Page]
- Table 1 — Relationship between EN 1434-1 and MID re. EMC levels
- 5 Dimensioning [Go to Page]
- Figure 2 — Outdoor temperature duration in Europe0F [Go to Page]
- Figure 3 — Dimensioning thermal power for hot water as a function of the number of normal apartments. [Go to Page]
- 6 Determining the flow rate [Go to Page]
- 7 Selecting a flow sensor for a thermal energy meter
- 8 Checking the flow sensor design after commissioning [Go to Page]
- Figure 4 — Single-beam sensor
- Figure 5 — Woltman sensor for vertical or horizontal installation
- Figure 6 — Multi-beam sensor
- Figure 7 — Woltman sensor for horizontal installation only
- Figure 8 — Ultrasonic flow sensor
- Figure 9 — Ultrasonic flow sensor
- Figure 10 — Magnetic-inductive flow sensor
- Figure 11 — Three fluidic meter lay-outs; jet flow is upwards [Go to Page]
- Table 2 — Maximum lengths of leads for 2-wire temperature sensors [Go to Page]
- Table 3 — Systematic negative deviation as a function of a different pressure in inlet and outlet (pressure drop) and the temperature difference
- Figure 12 — Correct/incorrect installation of the outlet temperature sensor [Go to Page]
- 9 Arranging of meters for thermal energy [Go to Page]
- Table 4 — Mechanical environment classes from the Measuring Instrument Directive 2014/32/EU [Go to Page]
- Figure 13 — Laminar flow
- Figure 14 — Turbulent flow
- Figure 15 — Flow with asymmetric velocity distribution
- Figure 16 — Flow with swirling velocity distribution
- Figure 17 — Examples of suitable and unsuitable arrangements for flow sensors [Go to Page]
- Figure 18 — Different temperature levels in the measuring range
- Figure 19 — Sensor tips in the non-operation area
- Figure 20 — Sensor tips not sufficiently immersed [Go to Page]
- Figure 21 — Sensor fitted in a bend
- Figure 22 — Sensor fitted in a straight pipe (flow direction has no influence)
- Figure 23 — Circuit diagram of a quadrant installation of four temperature sensors
- Figure 24 — Drawing of a quadrant installation [Go to Page]
- 10 Installing thermal energy meters [Go to Page]
- 11 Monitoring operation [Go to Page]
- Figure 25 — Ball valve for temperature sensor installation
- Table 5 — DN on ball valves versus the lengths of Direct Short sensors
- Figure 26 — Incorrect and correct temperature sensor installation [Go to Page]
- Figure 27 — Arrangement for a mixing circuit with a 3-way valve
- Figure 28 — Arrangement for a mixing circuit with a 2-way valve
- Figure 29 — Arrangement for a diverting circuit with a 3-way valve
- Figure 30 — System example with cooling ceilings
- 12 Other liquids than water [Go to Page]
- Figure 31 — Density (Y) in kg/l of a certain heat conveying liquid depending on volume fraction in % (multiple lines) and temperature (X) in C
- Figure 32 — Specific heat capacity (Y2) in kJ/(kg K) of a certain heat conveying liquid depending on volume fraction (multiple lines) in % and temperature (X) in C
- Figure 33 — Kinematic viscosity (Y3) in mm2/s of a certain heat conveying liquid depending on volume fraction in % (multiple lines) and temperature (X) in C
- Table 6 — Example: Physical properties of a certain propylene glycol-based liquids in typical concentrations [% Vol.] compared to water [Go to Page]
- Figure 34 — Meter performance: Measured meter deviations (Y) in % at different temperatures against flow values (X) in m3/h (solid lines = high viscosity, dashed lines = low viscosity)
- Figure 35 — Meter performance: Measured meter deviations (Y) in % at different temperatures against Reynolds number (X); 1 = laminar zone, 2 = transient zone, 3 = turbulent zone
- Figure 36 — The influence of the flow profile on deviations of an exemplary ultrasonic flow sensor
- Figure 37 — Relative deviations of impeller flow meter with liquids at same temperature
- Figure 38 — Relative deviations of impeller flow meter with liquids at same viscosity (right)
- Figure 39 — Impeller flow meter deviations against the flow rate/kin. viscosity-factor, which is proportional to the Reynolds number [Go to Page]
- Bibliography [Go to Page]