Document ID: chunk:federal_register_of_legislation:F2022C00033:reg:9:p2
Version: federal_register_of_legislation:F2022C00033
Segment Type: reg
Provision Reference: reg 9 (pt 2/9)
Character Range: 27163–29927

of performance for a scaled family of products
    An interpolation approach may be used if all members of a family of products must have the:
          same solar collector;
          same ratio of collector area to tank volume; and
          same collector flow rate per unit area.
    The performance of the family of products may be determined from detailed simulation of the performance of the largest, smallest and midpoint system sizes with the pipes, boosters and pumps they include. The performance of other members of the family may be determined by interpolation using a non-linear fit to the ratings of the largest, smallest and midpoint products.  Auxiliary boosters and pumps for each interpolated model must have equal or greater efficiency than the smallest member of the interpolated range.
b) Sub-unit approach: parallel sub-unit family of products
    A sub-unit approach may be used if a family of products consists of parallel sub-units that each have an identical solar collector array, storage tank, booster and pump configuration.
    The system performance rating of the family of products may be determined by multiplying the STC of one sub-unit by the number of sub-units and rounding down the resulting STC. The volume of each sub-unit tank may be less than 700 litres, but the combined physical inner tank volume of each member of the family of products must be greater than 700 litres.
The following system configuration variations in the installed systems may be used:
          the collector arrays of the multiple sub-units may be combined into one inter-connected collector array;
          the multiple sub-unit pumps may be replaced with one or more larger pumps of lower overall power consumption;
          the multiple sub-unit piping may be replaced with larger diameter piping provided the pipe insulation thermal resistance is equal to or larger than the pipe insulation resistance in the rated sub-unit; and
          the collector flow rate per unit area in a composite system shall be the same as for the rated sub-unit.  This also applies to composite systems in which the pump and/or piping has been modified from the rated sub-unit.

Part 3 – TRNSYS Modelling Guidelines

Division A – Introduction

This Part sets out the TRNSYS Modelling Guidelines, which must be adhered to in using the methods in Parts 1 and 2 of this Schedule. The TRNSYS Modelling Guidelines specify the format and structure required for the TRNSYS deck files, and the default values to be used in certain circumstances.

Division B – TRNSYS Decks

Deck layout
 All include files shall be at the top of the deck immediately after the SIMULATION statement and the timestep shall be 0.02 h or less
 The chosen time step shall be an exact