Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

Option D is the correct answer.

Dehumidification process is, h =h1-h2 or h= (h1-hA) + (hA-h2) = SH+LH.
Where, SH= h1-h2 and LH= hA-h2.
SFH=sensible heat / total heat =SH/SH+LH=h1-hA/h1-h2.
This is the answer but here mention the opposite.

Correct me, if I am wrong.

Here;

SHF=SH/(SH+LH)
So,
h1-h2/h1-ha is the correct answer.

I think option C is the answer.
SHF=SH/TH.
=h1-h2/ha-h2.
Please correct me if I am wrong.

No the correct option is is h2-ha/h1-ha.

I think option C is correct answer.

Here, SHF=(h1-h2)/(h1-ha).

By separating the total heat transfer rate from the cooling coil into sensible and latent heat transfer rates, a useful parameter called Sensible Heat Factor (SHF) is defined.

SHF is defined as the ratio of sensible to total heat transfer rate.

More like bypass factor.

General Design Values- shr(sensible heat ratio)

*. Auditoriums, Theaters - SHR : 0.65 - 0.75
*. Apartments - SHR : 0.80 - 0.95
*. Banks, Court Houses, Municipal Buildings - SHR : 0.75 - 0.90
*. Churches - SHR : 0.65 - 0.75
*. Dining Halls - SHR : 0.65 - 0.80
*. Computer Rooms - SHR : 0.80 - 0.95
*. Cocktail Lounges, Bars, Taverns, Clubhouses, Nightclubs - SHR : 0.65 - 0.80
*. Jails - SHR : 0.80 - 0.95
*. Hospital Patient Rooms, Nursing Home, Patient Rooms - SHR : 0.75 - 0.85
*. Kitchens - SHR : 0.60 - 0.70
*. Libraries, Museums - SHR : 0.80 - 0.90
*. Malls, Shopping Centers - SHR : 0.65 - 0.85
*. Medical/Dental Centers, Clinics and Offices - SHR : 0.75 - 0.85
*. Motel and Hotel Public Areas - SHR : 0.75 - 0.90
*. Motel and Hotel Guest Rooms - SHR : 0.80 - 0.95
*. Police Stations, Fire Stations, Post Offices - SHR : 0.75 - 0.90
*. Precision Manufacturing - SHR : 0.80 - 0.95
*. Restaurants - SHR : 0.65 - 0.80
*. Residences - SHR : 0.80 - 0.95
*. Retail, Department Stores - SHR : 0.65 - 0.90
*. Other Shops - SHR : 0.65 - 0.90
*. School Classrooms - SHR : 0.65 - 0.80
*. Supermarkets - SHR : 0.65 - 0.85