Draft Details

1.1 General

1.1.1 Purpose

This Standard specifies laboratory test methods and procedures for determining operational performance indicators of Thermal Energy Storage System’s (TESS) used for space heating applications in residential, commercial and institutional buildings.

This standard includes an informative annex to introduce basic building TESS grid services functions, including building TESS equipment communication.

1.1.2 Applicability

a)    This Standard applies to packaged building TESS that can be tested in laboratory environment. The system is either a factory pre-assembled unit or a unit assembled on-site in the laboratory test facility from factory-supplied components.

b)   The TESS is charged electrically and discharged thermally. The energy shall be stored as latent heat or as sensible heat or as a combination of the two.

c)    The TESS is charged by electric-resistance heating, and the electric resistance mechanism is an integral part of or is located inside the TESS.

d)   The TESS is discharged with a heat transfer fluid that enters the system through a single inlet and leaves the system from a single outlet. TESS having more than one inlet and/or outlet shall be tested according to this standard, but each flow configuration involving a single inlet and a single outlet must be tested separately. The heat transfer fluid may be either a non-condensing gas or a liquid.

·    Note: for more clarification, refer to Annex F

1.1.3 Exclusions

This Standard does not apply to:

a)    TESS that are charged by a thermal input other than integrated electric resistive heating.

b)   TESS where the thermal storage medium leaves the extent of the system (e.g. hot water storage tanks).

c)    TESS that are only used for domestic hot water.

d)   TESS that are only used for cooling.

e)    TESS that are intended for use in industrial or power generation applications.

f)    Long-term or Annual/Seasonal TESS

g)    Room TESS

1.2 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

1.3 Units of measure

The values given in SI units are the units of record for the purposes of this Standard.

2 Reference publications

This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.