Page 522 - Design and Operation of Heat Exchangers and their Networks

Appendix 505

fprintf("thm =%f, tcm =%f, 1-thm =%f, e_h =%f\n", ...
thm, tcm, 1 - thm, epsilon_h);

case 46
% analytical
nua2b = special_function_nu(aA, 2 ∗ bA);
nu1 = special_function_nu(aA, bA);
epsilon_h =1-2 ∗ nua2b + (2 - nu1) ∗ nu1;
% numerical
th(:, :) = 1;
tc(:, :) = 0;
ntuh = NTUh(1);
ntuc = NTUc(1);
[th, tc, thm, tcm] = crossflow_unmixed_unmixed ...
(ntuh, ntuc, nx, ny, th, tc);
fprintf("thm_i =%f, tcm_i =%f\n", thm, tcm);

ntuh = NTUh(2);
ntuc = NTUc(2);
th(:, :) = thm;
for i=1:1:nx1
tc(i, 1) = tc(i, ny1);
end
[th, tc, thm, tcm] = crossflow_unmixed_unmixed ...
(ntuh, ntuc, nx, ny, th, tc);
fprintf("thm =%f, tcm =%f, 1-thm =%f, e_h =%f\n", ...
thm, tcm, 1 - thm, epsilon_h);

case 55
% analytical
mua = special_function_mu(aA, bA);
mub = special_function_mu(bA, aA);
epsilon_h = mua + mub / Rh(1);
% numerical
th(:, :) = 1;
tc(:, :) = 0;