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CRP-05-D/2000 - Flow and energy computer for water

Application

The flow and energy computer for water CRP - 05 - D/2000 is dedicated for settling measurement systems installed in heat distribution networks. This device can work like autonomous measurement system or can be included in greater monitoring system with data multi-access.


CRP-05-D/2000
CRP - 05 - D/2000

Measurements’ and calculations’ precision

CRP - 05 - D/2000 realizes analog measurements using 24-bits A/C converter of the sigma-delta type. Software provides calibration of current and resistant measurement inputs according to the temperature. This enables proper performance of the unit in a wide range of temperatures. Software adjusts A/C converters during operation and eliminates an offset.


Data access

An internal data base is created in CRP – 05 flash memory, where every calculated values (balances, average and current values and summators) with its time markers are stored. An access to this base as well as to current computer reading is possible from device’s desktop or on-line, using digital interface.

User can access the following information:

  • mass summators
  • energy summators
  • inlet temperature(t1)
  • outlet temperature(t2)
  • inlet pressure (P1) (constant value – 16 bars)
  • outlet pressure (P2) (constant value – 16 bars)
  • inlet or outlet volume flow (V1)
  • inlet or outlet volume flow (V2) (**)
  • inlet or outlet mass flow (qm)
  • inlet or outlet mass flow (q2) (**)
  • emitted heat power (F) based on mass flow qm
  • emitted heat power (F2) based on mass flow q2 (**)
  • inlet (v1) and outlet (v2) water’s specific volume
  • inlet (h1) and outlet (h2) water’s enthalpy
  • inlet (eta1) and outlet (eta2) stickiness
  • Reynolds’s number
  • ‘k’ coefficient

(**) – only in case of measurements with two volume flowmeters


Communication

Computer for heatmeter CRP - 05 - D/2000 is equipped with serial interface RS 232 or RS 485 (MODBUS RTU) which enables transmission of data to the supervision system.

It is also possible to connect CRP – 05 to M-Bus (widely used in heat distribution networks) using RS 485/M-Bus converter. Communication is realized according to IEC 870 norm, and data access according to EN1434-3 norm.

There are number of methods of connecting CRP – 05 to the supervision system. HYDRO-ECO-INVEST offers some products which are useful to design of the heat energy monitoring systems, for example: