{
  "url": "https://openlegislation.uk/eu-regulation-2019-331/annex-VII/division-7/division-7.2/division-1",
  "json_url": "https://openlegislation.uk/eu-regulation-2019-331/annex-VII/division-7/division-7.2/division-1.json",
  "legislation": "eur/2019/331",
  "legislation_title": "Commission Delegated Regulation (EU) 2019/331 of 19 December 2018 determining transitional Union-wide rules for harmonised free allocation of emission allowances pursuant to Article 10a of Directive 2003/87/EC of the European Parliament and of the Council (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2019-331",
  "path": "annex/VII/division/7/division/7.2/division/1",
  "kind": "division",
  "number": null,
  "heading": "Method 1: Using measurements",
  "text": "Under this method, the operator measures all relevant parameters, in particular temperature, pressure, state of the transmitted as well as the returned heat medium. The state of the medium in case of steam shall refer to its saturation or degree of superheating. The operator furthermore measures the (volumetric) flow rate of the heat transfer medium. Based on the measured values, the operator determines the enthalpy and the specific volume of the heat transfer medium using suitable steam tables or engineering software.\nThe mass flow rate of the medium is calculated as\n(Equation 3)\nWhere ṁ is the mass flow rate in kg/s, V is the volumetric flow rate in m3/s and υ is the specific volume in m3/kg.\nAs the mass flow rate is considered the same for transmitted and returned medium, the heat flow rate is calculated using the difference in enthalpy between the transmitted flow and the return, as follows:\n= (hflow – hreturn ) · ṁ\n(Equation 4)\nWhere Q is the heat flow rate in kJ/s, hflow is the enthalpy of the transmitted flow in kJ/kg, hreturn is the enthalpy of the return flow in kJ/kg, and ṁ is the mass flow rate in kg/s.\nIn case of steam or hot water used as heat transfer medium, where the condensate is not returned, or where it is not feasible to estimate the enthalpy of the returned condensate, the operator shall determine hreturn based on a temperate of 90 °C.\nIf the mass flow rates are known to be not identical, the following shall apply:\nWhere the operator provides evidence to the satisfaction of the regulator that condensate remains in the product (e.g. in ‘life steam injection’ processes), the respective amount of condensate enthalpy is not deducted;\nWhere heat transfer medium is known to be lost (e.g. due to leakages or sewering), an estimate for the respective mass flow shall be deducted from the mass flow of the transmitted heat transfer medium.\nFor determining the annual net heat flow from the above data, the operator shall – subject to the measurement equipment and data processing available, use one of the following methods:\nDetermine annual average values for the parameters determining the annual average enthalpy of the transmitted and returned heat medium, and multiply with the total annual mass flow, using equation 4;\nDetermine hourly values of the heat flow and sum up those values over the annual total operating time of the heat system. Subject to the data processing system, hourly values may be substituted by other time intervals as appropriate.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Words in Regulation substituted (31.12.2020) by The Greenhouse Gas Emissions Trading Scheme (Amendment) Order 2020 (S.I. 2020/1557), art. 2(2), Sch. 1 para. 2"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2019/331/annex/VII/division/7/division/7.2/division/1",
    "retrieved_at": "2026-11-01T14:43:32.978234+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}