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 2/4)
Character Range: 16606–19547

PV/T collectors will only be eligible for STCs as a SWH in relation to the water heating component of the system.

Part 2 – Method for solar water heaters with a volumetric capacity more than 700 litres

Division A – Introduction

This Part sets out the method for determining the number of STCs that may be created for models of SWHs that are large SWHs.

Division B – Method

The method for determining the number of STCs that may be created for a large SWH is based on AS/NZS 4234:2008 and AS/NZS 4234:2008 Amendments 1 and 2, with additional requirements specified in this Determination.
Large SWHs shall be rated for climate zones 1 to 4 specified in AS/NZS 4234:2008.
The method is as follows:
1. Using the TRNSYS computer modelling package, format the TRNSYS deck files as set out in the TRNSYS Modelling Guidelines in Part 3 of this Schedule.
2. Calculate the total annual auxiliary energy use (MWh) for the large SWH using the TRNSYS computer modelling package, using the following TRNSYS input parameters:
           a. Solar collector slope = 20°.
           b. Solar collector azimuth = 45°.
           c. For the climatic zones, use the weather data published by the Clean Energy Regulator.
Note:   Weather data could in December 2016 be found on the Clean Energy Regulator's website (http://www.cleanenergyregulator.gov.au/RET/Pages/Forms and resources/Forms-and-resources-for-manufacturers.aspx).
           d. The modelling of the product shall show compliance with the legionella control requirements specified in AS 3498-2009.
           e. To rate thermosiphon SWHs and thermosiphon sidearm heat exchangers, use extension package TRNAUS.
           f. Tank heat loss for a storage tank must be determined in accordance with the requirements met by the storage tank under regulation 3A(3)(c) of the Renewable Energy (Electricity) Regulations 2001, as in force from time to time.
           g. The modelled lengths of piping shall be based on the following:
              i. For a pumped circulation system, the length of pipe between the storage tank and the closest corner of the solar collector array for shall be the manufacturer's specification or 25 m (each way), whichever is the larger.
              ii. For all systems the lengths of the supply and return pipes shall account for additional piping length associated with reverse return plumbing.
              iii. For a pumped circulation solar preheat tank, the length of piping between the pre-heat tank and the series auxiliary booster shall be the manufacturer's specification or 10 m, whichever is the larger.  If the auxiliary booster is integral with the pre-heat tank, then the actual pipe lengths shall be used.
              iv. For a thermosiphon solar preheater, the length of piping between the preheater and the series auxiliary booster shall be the manufacturer's specification or 25 m, whichever is the larger. If the auxiliary booster is integral