$(1$ point$)$ The refinery will require a cooling system. There will be a cooling pond on property that you expect to stay at $35C.$ The water used to cool the exhaust will be sent to the pond at a flow rate of $10\frac{m^3}{m}in$ at a temperature of $800C.$ Find the enthalpy change of the cooling water in $1$ day. Use ${}_{\text{w}\text{a}\text{t}\text{e}\text{r}}=1000k\frac{g}{m^3},C_p=4\mathrm{.}2k\frac{J}{kg*K}$; Reminder: $H=M{C}_{p}T,$ you can use $M^{}$ for $d\frac{M}{d}t$ and use $1$ day as $dt$

mass rate of cooling water

$s\frac{g}{d}$

Enthalpy

$\frac{J}{d}$

$(2$ points$)$ The refinery will produce sound at a power level of $139dB($Using the standard reference of $($:${10}^{-12}(W)\}$ at $4000Hz.$ Determine the sound pressure level $408\mathrm{.}0m$ directly downwind of the refinery on a clear winter night with a $4\mathrm{.}5\frac{m}{s}$ wind speed, a $0\mathrm{.}0C$ temperature, $30\mathrm{.}0\%$ relative humidity, and $101\mathrm{.}2$ kPa barometric pressure. This meteorology has air attenuation of $28\mathrm{.}15db$ and ground attenuation of $-2\mathrm{.}86dB.$ The height from which the noise emanates is $12m.$

$(1$ point$)$ You recommend that the company installs a wet scrubber to control particulate $($PM$)$ emissions. This involves spraying water on the exhaust gases, so that most of the particles leave in the water not the gas. The concentration of particles after combustion $($in the influent gas$)$ is $500\frac{g}{m^3},$ the removal efficiency $)$ is $95\%,$ the gas flow is $15\frac{m^3}{s}$ and the water flow is $1\frac{m^3}{s}.$ What is the concentration of PM in the slurry $($sludge waste$)$ leaving the scrubber?

Hints: removal efficiency $($all one media, gas or liquid$)=\frac{P{M}_{in}-P{M}_{\text{o}\text{u}\text{t}}}{P{M}_{in}}100\%$

Conservation of mass: all PM either ends up in gas or slurry.

Concentration: $\frac{M}{V}=\frac{(M^{})}{Q}$

The tricky part here is keeping gas and liquid flows straight.

$\backslash$table$[[P{M}_{in}($scrubber$),\frac{?}{d}$