Paragraph 1.10 Chemical Heat of CombustionF1
The chemical heat of combustion ΔHc shall be either determined by:
acknowledged rules of technology, described e.g. in standards such as ASTM D 240, ISO 13943 86.1 to 86.3 and NFPA 30B, or found in the scientifically established literature; or
applying the following calculation method:
The chemical heat of combustion (ΔHc), in kilojoules per gram (kJ/g), can be calculated as the product of the theoretical heat of combustion (ΔHcomb), and a combustion efficiency, usually less than 1,0 (a typical combustion efficiency is 0,95 or 95%).
For a composite aerosol formulation, the chemical heat of combustion is the summation of the weighted heats of combustion for the individual components, as follows:
where:
ΔHc = chemical heat of combustion (kJ/g) of the product;
wi% = mass fraction of component i in the product;
ΔHc(i) = specific heat of combustion (kJ/g) of component i in the product.
The person responsible for the marketing of the aerosol dispenser has to describe the method used for determining the chemical heat of combustion in a document to be made readily available in English at the address specified on the label in accordance with regulation 3(8)(a)(i), if the chemical heat of combustion is used as a parameter for assessing the flammability of aerosols, according to the provisions of these Regulations.
Annotations
Textual amendments
- F1
Sch. 1A inserted (E.W.S.) (31.12.2020) by The Product Safety and Metrology etc. (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/696), reg. 1, Sch. 13 para. 8 (with reg. 2 as amended by S.I. 2020/676, regs. 1(1), 2); 2020 c. 1, Sch. 5 para. 1(1)