Answer:
ummm why is you doing this
Explanation:
It doesnt make sense.
Answer: False
Explanation: Sandwich materials are usually in composite material form which has a fabrication of two thin layers which are stiff in nature and have light weighing and thick core .The construction is based on the ratio that is of stiffness to the weight .Therefore, the density of the material in the core is not high and are only connected with the skin layer through adhesive .So the given statement is false that sandwich materials typically use a high density core with non- structural cover plates.
I think that the answer would be B or C
Team members and the work from ther
Answer:
The mass flow rate of cooling water required to cool the refrigerant is
.
Explanation:
A condenser is a heat exchanger used to cool working fluid (Refrigerant 134a) at the expense of cooling fluid (water), which works usually at steady state. Let suppose that there is no heat interactions between condenser and surroundings.The condenser is modelled after the First Law of Thermodynamics, which states:
![\dot Q_{ref} - \dot Q_{w} = 0](https://tex.z-dn.net/?f=%5Cdot%20Q_%7Bref%7D%20-%20%5Cdot%20Q_%7Bw%7D%20%3D%200)
![\dot Q_{ref} = \dot Q_{w}](https://tex.z-dn.net/?f=%5Cdot%20Q_%7Bref%7D%20%3D%20%5Cdot%20Q_%7Bw%7D)
![\dot m_{ref}\cdot (h_{ref, in} - h_{ref,out}) = \dot m_{w}\cdot (h_{w, out} - h_{w,in})](https://tex.z-dn.net/?f=%5Cdot%20m_%7Bref%7D%5Ccdot%20%28h_%7Bref%2C%20in%7D%20-%20h_%7Bref%2Cout%7D%29%20%3D%20%5Cdot%20m_%7Bw%7D%5Ccdot%20%28h_%7Bw%2C%20out%7D%20-%20h_%7Bw%2Cin%7D%29)
The mass flow rate of the cooling water is now cleared:
![\dot m_{w} = \dot m_{ref }\cdot \frac{h_{ref,in}-h_{ref,out}}{h_{w,out}-h_{w,in}}](https://tex.z-dn.net/?f=%5Cdot%20m_%7Bw%7D%20%3D%20%5Cdot%20m_%7Bref%20%7D%5Ccdot%20%5Cfrac%7Bh_%7Bref%2Cin%7D-h_%7Bref%2Cout%7D%7D%7Bh_%7Bw%2Cout%7D-h_%7Bw%2Cin%7D%7D)
Given that
,
,
and
, the mass flow of the cooling water is:
![\dot m_{w} = \left(7.2\,\frac{kg}{min} \right)\cdot \left(\frac{808.34\,\frac{kJ}{kg}-88.82\,\frac{kJ}{kg} }{104.83\,\frac{kJ}{kg}-62.98\,\frac{kJ}{kg} } \right)](https://tex.z-dn.net/?f=%5Cdot%20m_%7Bw%7D%20%3D%20%5Cleft%287.2%5C%2C%5Cfrac%7Bkg%7D%7Bmin%7D%20%5Cright%29%5Ccdot%20%5Cleft%28%5Cfrac%7B808.34%5C%2C%5Cfrac%7BkJ%7D%7Bkg%7D-88.82%5C%2C%5Cfrac%7BkJ%7D%7Bkg%7D%20%7D%7B104.83%5C%2C%5Cfrac%7BkJ%7D%7Bkg%7D-62.98%5C%2C%5Cfrac%7BkJ%7D%7Bkg%7D%20%7D%20%5Cright%29)
![\dot m_{w} = 123.788\,\frac{kg}{min}](https://tex.z-dn.net/?f=%5Cdot%20m_%7Bw%7D%20%3D%20123.788%5C%2C%5Cfrac%7Bkg%7D%7Bmin%7D)
The mass flow rate of cooling water required to cool the refrigerant is
.