Hello Everybody,
i have a question about Mathcad 14. How can i solve a System of n equations that has all equations in the same form like
Equation i: Q_i = k_i*A_i*DT ....
when DT is a constant, all Q_i and k_i are given.
How can i do this directly? I dont want to write all equations down, coz i want to keep the number of equations as a variable.
Thanks
Lert
Solved! Go to Solution.
Wayne Reid wrote:
Added a function format to Fred's
I thought the idea was to solve for A_i. You can still do what you were doing, just write a different function.
Hi all,
Thx for ur answers. i'm in vacation and will check the files next week.... actually i have another system that's more complicated .... looks like
Equations i:
Q_i = k_i*A_i*DT_i
DT_i = ((T_S - T_E) - (T_S - T_A_i)) / (ln(T_S - T_E) - ln(T_S - T_A_i))
T_A_i = T_E + (Q_i * Sum(A_i)) / (m_K * A_i * C_p)
the Q_i and k_i are given. the T_S, T_E, m_K and C_p are constant. that means ... we have only A_i, DT_i and T_A_i as variables ( 3n Equations ... 3n Variables)
can i use ur technics in those files or how can i do this?
Thx again for both of u.
Lert
Ps. if u cannot understand this, i will create a file next week.
Lert Pianapitham wrote:
Hi all,
Thx for ur answers. i'm in vacation and will check the files next week.... actually i have another system that's more complicated .... looks like
Equations i:
Q_i = k_i*A_i*DT_i
DT_i = ((T_S - T_E) - (T_S - T_A_i)) / (ln(T_S - T_E) - ln(T_S - T_A_i))
T_A_i = T_E + (Q_i * Sum(A_i)) / (m_K * A_i * C_p)
the Q_i and k_i are given. the T_S, T_E, m_K and C_p are constant. that means ... we have only A_i, DT_i and T_A_i as variables ( 3n Equations ... 3n Variables)
can i use ur technics in those files or how can i do this?
Thx again for both of u.
Lert
Ps. if u cannot understand this, i will create a file next week.
Send please this equations as a Mathcad-sheet.
Hello! I am struggling with solve blocks in MathCAD, trying to make Given-Find too, not working for my equations.
Could you explain how it is working and how I can find solution to my problem?
I have 3 equations, 2 of them have 1 variable each(x and y), 3rd equation is for help...
See attached worksheet.
Many Thanks and Regards,
Aidan
I'm not sure what's stopping your solve block; but your three constraints are actually two independent equations--you don't need a solve block
Thx. very much .... it's very useful!
Lert