Department of Mechanical engineering

Subject: Design of heat transfer equipments Date:

Subject code: Time: 1 hour

. FLOW THROUGH ORIFICE

AIM: - To determine hydraulic co-efficient for a given orifice

INSTRUMENT AND EQUIPMENTS REQUIRED

1. Orifice Apparatus.2. Orifice Plate.3. Vernier Calliper.4. Stop Watch.5. Scale.

THEORY: - A small hole made inside or bottom of the tank is called orifice.

FLOW THROUGH ORIFICE

AIM: - To determine hydraulic co-efficient for a given orifice

INSTRUMENT AND EQUIPMENTS REQUIRED

1. Orifice Apparatus.2. Orifice Plate.3. Vernier Calliper.4. Stop Watch.5. Scale.

THEORY: - A small hole made inside or bottom of the tank is called orifice.

)

OR

Q2) 1,75,000lb/hr of distilled water enters an exchanger at 930 F and leaves at 850 F. The heat will be transferred to 2,80,000 lb/hr of raw water supplied at 750 F and leave the exchanger at 800 F at 10 psi pressure drop may be expected on both the streams while Rd= 0.0005 for the distilled water and 0.0015 for raw water. When the tube velocity exceeds 6FPS available for this service is a 15.25“ ID exchanger having 160 3.25“ OD 18BWG 16 ft long tubes laid out on 15/16“ triangular pitch. The bundle is arranged for 2 passes and baffles are spaced 12” apart will the exchanger be suitable? (25 Marks)

Q1) 6900 lb/hr of 260 API lubricating oil must be cooled from 4500-3500F by 72500 lb/hr of 340 API midcontinent crude oil. The crude will be heated from 3000-3100 F. A fouling factor of 0.003 should be provided for each stream and allowable pressure drop on each stream will be 10 psi. A number of 20 ft hair fins of 3/2 “ IPS are available how many must be used and how shall they be arranged the viscosities are 1.4 centipoises at 500 F for lubricating oil 3.08 4000 F and 7.7 at 3000 F. (25 MarksSemester:

IIIrd SEM M.Tech

Note: Answer any one question