(25 points) this question includes lel, e2,e3 the following data refer for a space to be air conditioned: inside design condition: 27 cdb, 21 c wb outdoor air conditions: 8cdb, 70% rh sensible heat load: latent heat gain: the outside air is supplied at the rate of 20 m/min directly into the room ventilators and by infiltration. the outside air is mixed with return air and passed through a heating coil which of the total air recirculated from the conditioned space is 80% and mixed with the fresh air 20%. a) identify the system components and show a schematic dagram (e1] (5 pts) b) formulate the heating load calculation needed for this problem e2] (to pts) c) total heating load of the coil in kj/kg 126,000 kj/hr 50400 kj/hr e3) (10 pts)

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

the part of the wave he is travelling on is the crest