The pipe equation does not currently consider the y-wise conduction along the length of the pipe. This is likely to have a significant effect as it effectively works to reduce the gradient in temperature along the length of the pipe, and hence reduces the output temperature of the collector.
The pipe equation does not currently consider the y-wise conduction along the length of the pipe. This is likely to have a significant effect as it effectively works to reduce the gradient in temperature along the length of the pipe, and hence reduces the output temperature of the collector.