Answer to Question #188783 in Mechanical Engineering for John

Question #188783

A balanced-flow ERV is used to ventilate a warehouse at a rate of 1,000 L/s. The air conditions within the warehousearequitecoolanddry,Tdb=10°CandRH=50%.Ataparticularmoment,theoutsideairenters theERVatTdb=38°CandRH=40%.Duringthistime,theairconditionsleavingtheERVontheexhaustside are measured to be Tdb= 31°Cand RH =35%.a)Estimate the Sensible-Effectiveness (%) of theERV.b)Estimate the Latent-Effectiveness (%) of theERV.c)Estimate the drybulb temperature (°C) and relative humidity (%) leaving the ERV on the fresh-airside.d)Plot the conditions of all four air-streams (i.e.,fresh-air, entering and leaving; exhaust-air, entering and leaving) on a psychrometricchart.


1
Expert's answer
2021-05-05T07:46:20-0400

rate = 1000 L/s

Tempin = 10°C

Rhin = 50%


Tempout = 38°C

Rhout = 40%


Tdbac = 31°C

Rhac = 35%







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