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Is it feasible that in CHW Cooling coil, design coil load is much greater than Nominal capacity?

asked 2019-01-18 23:12:45 -0500

Smruti's avatar

updated 2019-01-21 15:02:13 -0500


I have attached the OSM file and the eplus output file. I don't understand where I have made mistake.

  • The cooling coil design load is 2837396 W whereas, its nominal capacity is 1775951 W
  • The cooling tower has less wattage (2682661 W) than electric chiller (2837348 W).
  • The comfort parameter is never met through out the year.

Please help.

Regards, Smruti

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answered 2019-01-22 07:15:45 -0500

Smruti's avatar

I have rectified the problem my self.

  • The problem was related to the sizing factors. I gave a global sizing factor of 1.25 for cooling equipment as well as 1.25 for chiller. This made the chiller having more wattage than the cooling tower.

  • The comfort parameters are satisfied after I changed the default setting (like loop exit temperature and loop temperature difference)about condenser and chiller loops in open studio.

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Asked: 2019-01-18 23:12:45 -0500

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Last updated: Jan 22 '19