For air volume flow rate Q=1.28 what is the air mass flow rate, kg/s?

We know that mass flow rate formula which is:

a)      If the heat transfer rate is 16 Kw at m=1.6 kg/s, what is the exits air temperature, C?

If Ns=2.4,0.8 ……% uncertainty in power .

The description of the Ns is missing

What uncertainty contributes most to uncertainty in power?

With higher exponents the pentameter , t is on , which contributes  most to a uncertainty  , hence where the uncertainty Q contributes most to a uncertainty in J

2). A 2m² insulated reservoirs is used to store chilled water for cooling machinery in a plant. After being chilled all night with no machinery running, the reservoir initially contains water at 15 C. At time t = 0, the morning shift starts and machinery needing cooling starts extracting 200 L/min from the tank while 200 L/min of 75 C water flows from the machinery back into the reservoir, keeping the reservoir full. At the same time, a cooling coil that removes 500 kW from the reservoir is running. The temperature of the cold water leaving the reservoir starts to rise due to the energy in the water returning from the machinery. Use water = 1.0 kg/L and C_p = 4.2 kJ/kg-K if needed.

a.) Write a differential equation and initial condition that could be solved for the temperature T of the water leaving the reservoir as a function of time. Assume the water in the reservoir is well mixed. Do not solve

c.) Roughly how long until steady state is reached? This can be done without solving the ODE in (a.)

To reach the steady state the rime is defined as “by the removing of the drug half life, after the 1 half life we reached the 50% of the steady states, or after the 2 half life’s we reached at the 75% steady states

3).Water  from coolong  pond at T_a =30 is used to cool the condenser in a chiller plant operating at T_c =45. The rquired heat condenser heat transfer rate q is at least 60kw and the pump head H_p cannot exeed 25m.     

a).what is objective function?

The target work is a way to augment (or limit) something. This something is a numeric esteem: in reality it could be the cost of a task, a generation amount, benefit esteem, or else even materials spared from a streamlined procedure. With the goal work, you are endeavoring to land at an objective for yield, benefit, asset utilize, as well as so on.

We have to take a gander at the connections amongst imperatives along with any constraints inside the business itself. These can incorporate creation limit limits, asset accessibility, or else even innovation.

b).what is constraints?

The subsystems, factor along with the element which works for the bottleneck. It confines an individual projects, as well as the systems where from its getting their potentials along with sources for its purpose.

The three constraints use in the projects, that are time table, scope along with the cost which is sometimes also called the triple constraints in the projects management’s triangles.

c).For A=800 and m_W=0.8 is the present value of the cot, $?

The present value

10.00$E

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