Instantaneous collector thermal efficiencies in less time

A modification of the 'standard' flow loop, based on the removal of thermal feedback due to the solar heating in the collector and on significant reduction in the transient behavior or time constant for the flow loop is discussed. The time constant is defined as the time required for the c...

Full description

Saved in:
Bibliographic Details
Published in:Solar energy 1980, Vol.24 (1), p.111-112
Main Authors: Kleis, S.J., Chen, R.T., Bannerot, R.B.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A modification of the 'standard' flow loop, based on the removal of thermal feedback due to the solar heating in the collector and on significant reduction in the transient behavior or time constant for the flow loop is discussed. The time constant is defined as the time required for the collector fluid temperature to achieve 63.2% of its final steady state value, and data on chill water flow rate are plotted. It is shown that the time constant can be changed by redesigning the chill water heat exchanger, that in the present design the response lag is essentially a function of time of residence of the collection fluid within the exchanger, and that faster time responses can be achieved by reducing the length of the coil.
ISSN:0038-092X
1471-1257
DOI:10.1016/0038-092X(80)90027-4