Heat meter
Encyclopedia
A heat meter is a device which measures thermal energy provided by a source
Heater
A heater is an object that emits heat or causes another body to achieve a higher temperature. In a household or domestic setting, heaters are usually appliances whose purpose is to generate heating...

 or delivered to a sink
Heat sink
A heat sink is a term for a component or assembly that transfers heat generated within a solid material to a fluid medium, such as air or a liquid. Examples of heat sinks are the heat exchangers used in refrigeration and air conditioning systems and the radiator in a car...

, by measuring the flow rate of the heat transfer fluid and the change in its temperature (ΔT
Psychrometrics
Psychrometrics or psychrometry or Hygrometry are terms used to describe the field of engineering concerned with the determination of physical and thermodynamic properties of gas-vapor mixtures...

) between the outflow and return legs of the system. It is typically used in industrial plants for measuring boiler output and heat taken by process, and for district heating
District heating
District heating is a system for distributing heat generated in a centralized location for residential and commercial heating requirements such as space heating and water heating...

 systems to measure the heat delivered to consumers.

It can be used to measure the heat output of say a heating boiler, or the cooling output from a chiller unit.

Elements

A heat meter consists of
  1. a fluid flow meter - typically a turbine-type flow meter, or alternatively an ultrasonic flow meter;
  2. a means of measuring the temperature between the outflow and the inflow - usually a pair of thermocouples;
  3. a means of integrating the two measurements over a period of time - typically half an hour - and accumulating the total heat transfer in a given period.

See also

  • District heating
    District heating
    District heating is a system for distributing heat generated in a centralized location for residential and commercial heating requirements such as space heating and water heating...

  • Heat cost allocator
    Heat cost allocator
    Heat cost allocators are devices attached to individual radiators in buildings that measure the total heat output of the individual radiator. Heat cost allocators can be either electronic, where an electronic sensor is used to calculate the heat consumption, and evaporative, where a special,...

  • Heating system
    Heating system
    A heating system is a mechanism for maintaining temperatures at an acceptable level; by using thermal energy within a home, office, or other dwelling. Often part of an HVAC system. A heating system may be centralized or distributed.-See also:...

  • Thermometer
    Thermometer
    Developed during the 16th and 17th centuries, a thermometer is a device that measures temperature or temperature gradient using a variety of different principles. A thermometer has two important elements: the temperature sensor Developed during the 16th and 17th centuries, a thermometer (from the...

  • Universal Metering Interface
    Universal Metering Interface
    UMI is a set of 3 free open specifications for smart metering and smart home products. The UMI specifications define; a module interface based on SPI, an optical communications interface based on EN62056-21 and a security interface based on ECC-256 and AES-128...

    (UMI)
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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