Thermal Design Solve Block Issues

Hi everyone,

I'm new to this community, but I hope that I can help contribute as well as learn a few things from everyone.

I'm currently working on a project for a class that involves designing the layout of a system that consists of a boiler, pump, and several heat exchangers.

It normally wouldn't be a problem to solve this problem by hand, but because this problem requires multiple pipes and exchangers I am using Mathcad to help automate the process. I've been able to set the constraints for pipe flow, temperature, and diameter; and, trust me, it's been an uphill climb getting all of my syntax correct so that this huge system of equations work.

I've recently tried adding a few extra constraints to help zero in on the actual values of flow rate, temperature, and diameter; but I'm afraid that I cannot get the solve block to find the solution, even if I adjust the CTOL or TOL or change the syntax of the equations.

I'd very much appreciate it if anyone could help me out with my syntax or other issues that I may have overlooked, but I'm fairly new when it comes to complex Mathcad equations and shortcuts. Thank you in advance for your help.

Note: I do not require help with my equations for this project exactly. I just need help formatting them in such a way that Mathcad can solve them. I have several other equations that I need to input, but I have left them out until I can fix the current problem. Also, please excuse the sloppiness of the file. I'm afraid that I did not learn the shortcut to call a certain value in a matrix until I was too far into this project. Thanks.

-Josh Bostick