Page 509 - Design and Operation of Heat Exchangers and their Networks

492 Appendix

ntuc = NTUc(1);
th(:, :) = t1(1, :, :);
tc(:, :) = t2(1, :, :);
[th, tc, thm, ] = crossflow_unmixed_unmixed ...
(ntuh, ntuc, nx, ny, th, tc);
for i=1 :1:nx1
for j=1:1:ny1
s = th(i, j) - t1(1, i, j);
if (abs(s) > abs(smax))
smax = s;
end
t1(1, i, j) = t1(1, i, j) + e ∗ s;
s = tc(i, j) - t2(1, i, j);
if (abs(s) > abs(smax))
smax = s;
end
t2(1, i, j) = t2(1, i, j) + e ∗ s;
end
end
t1(2, 1, :) = thm;

ntuh = NTUh(2);
ntuc = NTUc(2);
th(:, :) = t1(2, :, :);
tc(:, :) = t2(2, :, :);

th(1, :) = thm;
tc(:, 1) = t2(2, :, 1);
[th, tc, thm, tcm] = crossflow_unmixed_unmixed ...
(ntuh, ntuc, nx, ny, th, tc);
for i=1 :1:nx1
for j=1:1:ny1
s = th(i, j) - t1(2, i, j);
if (abs(s) > abs(smax))
smax = s;
end
t1(2, i, j) = t1(2, i, j) + e ∗ s;
s = tc(i, j) - t2(2, i, j);
if (abs(s) > abs(smax))
smax = s;