The electrical component sizes can be determined by analyzing the data that was generated with eQuest from previous HVAC assignment.
It was assumed that the Power load factor is 1, and the standard incoming electricity is at 480V.
The electric Consumption reaches the peak level in July, which is 286.1 kW. The gas consumption reaches the peak level in January which is 261.18 Btu/h.
Thus, the total energy consumption is 286.1 kW+261.18 Btu/h*2.931E-4=286.2kW=286.2kVa.
For each floor, 286.2kVa/11=26kVa. So a 50 kVa, 480V to 208/120V transformer is selected.
Panel located in the first floor of the mechanical room is in charge of 50 kVa*11(floor)= 550 kVa /480 V = 1150 A, 12 circuits.
Panels located on other floors sized for 50 kVa /120 V = 417 A.
Standard panel = 600 A, 208/120 V.
The emergency power generator is assumed to be 45kW, 208/120V based on the research online.
Citation:
https://sites.google.com/site/museumofstructure/assignment-5---electrical-plumbing/electrical-component-sizes
http://www.generac.com/
http://www.northerntool.com/shop/tools/buyers-guides_generators
It was assumed that the Power load factor is 1, and the standard incoming electricity is at 480V.
The electric Consumption reaches the peak level in July, which is 286.1 kW. The gas consumption reaches the peak level in January which is 261.18 Btu/h.
Thus, the total energy consumption is 286.1 kW+261.18 Btu/h*2.931E-4=286.2kW=286.2kVa.
For each floor, 286.2kVa/11=26kVa. So a 50 kVa, 480V to 208/120V transformer is selected.
Panel located in the first floor of the mechanical room is in charge of 50 kVa*11(floor)= 550 kVa /480 V = 1150 A, 12 circuits.
Panels located on other floors sized for 50 kVa /120 V = 417 A.
Standard panel = 600 A, 208/120 V.
The emergency power generator is assumed to be 45kW, 208/120V based on the research online.
Citation:
https://sites.google.com/site/museumofstructure/assignment-5---electrical-plumbing/electrical-component-sizes
http://www.generac.com/
http://www.northerntool.com/shop/tools/buyers-guides_generators