My Career In Mechanical Engineering

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Pages: 7

Career Episode 1
a) Introduction:
My first career episode will narrate the activities I performed when I was a student and studying my Bachelor’s degree in Mechanical Engineering. I had attended the University of Engineering and Technology (UET) Lahore from September 2006 to August 2010. I successfully completed my engineering on time and in four years. The geographical location of the university is in the city of Lahore in Punjab province in Pakistan. UET Lahore is the oldest engineering institution in Pakistan and is ranked among the top engineering universities in Asia and in the world.

b) Background:
I studied different subjects related to mechanical engineering in university. I was taught basic engineering subjects in my first year
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1.5 From my HVAC knowledge, I recalled that at design conditions there will be no dehumidification at the secondary coil. The latent load will be satisfied by the primary air alone. So I found the latent heat gain using the thermodynamic property tables, the mass of the primary air and the moisture contents of the previous points. Hence, I also found the room moisture content for both the zones. After that I located the state of air in both zones on the psychometric chart which indicated that they are on a single point. I noted the percentage saturation and the enthalpy on this point. From this data, I figured the cooling load of the primary …show more content…
1.11 I concluded that the constant air volume reheat system has higher operating costs as it provides simultaneous cooling and heating of the supply air while the fan coil system has lower operating costs. As per the codes and standards, the fan coil system is air and water air conditioning system and the terminal reheat system is all-air central conditioning system. In the all-air conditioning the only medium providing both sensible and latent cooling in the conditioned space is air. All cooling and humidification/dehumidification is provided in the central plant and the cold air is distributed to both zones which have their reheaters respectively. Further, I described that the four-pipe fan coil system has two secondary coils one cold and one hot, with one hot water supply, one hot water return, one cold water supply and one cold water return. Comparing both systems in terms of capital cost, I deduced that the fan coil system would cost more as its installation needs more piping for the hot and cold water flow, it would also require a pump to circulate the water through the coils in the room and would need the use of a chiller for cooling purposes and/or a boiler for heating