Nonlinear Solar Collector Characterization Type1
by G. Morrison (TRNAUS)
	The collector characterization in TRNSYS 13 is restricted to a linear
(Ti - Ta) function.  More complex functions can be defined via a performance
map, however establishment of the details of the map is usually very time 
consuming. The Australian Solar Test Standard AS2535 defines a wide range of
functions that can be used to describe the performance of most known solar
collector types.  This collector routine includes the following characterization
functions:
1)Efficiency Mode 2 is applicable to flat plate collectors with a temp. 
   dependent heat loss coefficient.
2)Efficiency Mode 3 is applicable to evacuated collectors where the modes of  
   heat loss are the conduction from the headers and radiation from the 
   absorbing surface.
3)Theoretical evacuated tubular collector characterization
   The efficiency of the tube-refelctor array and the heat loss from the panel
   of tubes.
	The solar collector is extended to allow optical response funtions of 
concentrating collectors to be specified via a map of optical acceptance.  If
detailed optical data is available from ray tracing analysis, this extension
allows a more accurate specification of optical effects than the standard bi-
axial optical response function.
REF:TRNSYS Extensions for Australian Solar Products(TRNAUS) by G. Morrison
    Univ. of New South Wales  Report No. 1991/FMT/2