Thermodynamics (Refrigerator Design)

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th e s a k e o f th is e x e rc is e .

th e n th e s e v a lu e s w jjj n o t b e a c c u ra te , b u t u s e th e m a n y w a y fo r

th e w o rk in g flu id . If yo u r re frig e ra to r is p a rtic u la rly la rg e o r s m a ll

e x c h a n g e r (c o n d e n s e r a n d e v a p o ra to r) . T h is in c lu d e s th e m a s s o f

w ill a s s u m e a m a s s o f 5 k g a n d a s iz e o f 0 . 3 m 3

Fo r e a c h h e a t

D e p e n d s o n m a n y fa c to rs , b u t v a ria ti D n is n o t o fte n e x tre m e w eH e a t E x c h a n g e rs [P ip in g

E x p a n s io n V a lv e N e g lig ib le s iz e a n d m a s s

S iz e : 4 . 7 5 c m J p e r w a tt o f p o w e r o u tp u t

T u rb in e : M a s s : 2 . 7 5 0 kg + 0 . 0 2 5 kg p e r w a tt o f p o w e r o u tp u t

S iz e : 4 7 5 c m 3 p e r w a tt o F p o w e r in p u t

C o m p re s s o r : M a s s : 2 . 7 50 kg + 0 . 0 2 5 kg p e r w a tt o f p o w e r in p u t

c o m p o n e n ts

A ll s p e c ific a tio n s m u s t b e p re s e n te d in S l u n its .

Y o u m u s t u s e o n e o f th e p ro v id e d in s u la tio n ty p e s (s e e b e lo w )

te m p e ra tu re re s e rv o ir .

Y o u m u s t u s e th e a m b ie n t a ir (2 0 °

C ) in s id e th e a irc ra ft c a b in a s y o u r h ig h :

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' " k i' " U i d m u s t b e R e frig e ra n t - 12 , R e frig e ra n t

- 2 2 , o r R e frig e ra n t - 13 4 a

Y o u r re frig e ra to r m u s t ru n a C a rn o t, R a n k in e , o r v a po r -

c o m p re s s io n c y c le

c lie n t '

s n e e d s , w ith th e fa ll? w in g re s tric tio n s

Y o u w ill b e a b le to d e s ig n y o u r re frig e ra tio n c y c le a n y w a y y o u d e c id e b e s t m e e ts y o u r

R e fiig e ra tio n C y c le D e s iq n

s iz e . M a s s , a n d e n e rg y e Ħic ie n c y a re im p o rta n t fa c to rs to c o n s id e r .

w o u ld h a v e fo r th e ir re frig e ra to r . M o n e y is n o o b je c t, b u t b e c a u s e it w ill b e u s e d in a n a irc ra ft,

P ro b le m a s y o u w o u ld lik e - yo u c a n c h o o s e y o u r c lie n ľ s b a c k g ro u n d , a n d w h a t u s e s th e y

F o r th is p ro je c t, yo u w ill b e d e s ig n in g a re fn g e ra tio n u n it. Y o u w itt b e a b le to fra m e th e

ro y a lty , o 1 l ty c o o n s , a n d o th e rs w h o te n d to s p e n d m o n e y e x tra v a g a n tly .

yo u r s e rv ic e s o fte n h a v e u n u s u a l h a b its a n d n e e d s ; th e y c o n s is t o f e n te rta in e rs , a th le te s ,

Y o u d e s ig n c u s to m re frig e ra tio n u n its fo r e x e c u tiv e a n d p riv a te je ts c lie n ts e n lis tin g

s c e n a rio

R e frig e ra to r D e s ig n

Le h m a n

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9 ) C a lc u la te to ta l s iz e a n d m a s s o f th e frid g e

C a fc u la te a ll w o rk a n d h e a t tra n s le r ra te s , a n d c o e ffic ie n t o f p e rfo rm a n c e .

n o t, g o b a c k a n d r o s te p 3 o r s te p 5 .

frid g e , c a lc u la te th e n e c e s s a ry m a s s n o w ra te . M a k e s u re M e re s u lt is re a s o n a b le ; ir

7 ) U s in g th e s p e c ific h e a t tra n s fe r o f y o u r c y c le a n d th e n e e d e d h e a t tr a n s fe r ra te o f y o u r

6 ) C a lc u la te h e a t tra n s fe r a n d w o rk v a lu e s in s p e c ific (p e r k g ) te rm s

5 ) C h o o s e w o rk in g n u id a n d c y c le s ta te s in s p e c ific (p e r k g ) te rm s

4 ) C h o o s e c y c le a n d c h o o s e h ig h a n d lo w c y c le te m p e ra tu re s

3 ) C h o o s e in s u la tio n a n d th ic k n e s s c a lc u la te h e a t tra n s fe r ra te in to th e frid g e .

2 ) C h o o s e frid g e s h a p e a n d s to ra g e s iz e

1 ) D e fin e c lie n t n e e d s , a n d c h o o s e frid g e te m p (lo w te m p re s e rv o ir )

T h is p ro je c t is m o s t e a s ily c o m p le te d if y o u fo llo w th e s e s te p s in a p p ro x im a te ly th is o rd e r .

S tra te q v & H in ts

M e e tin g c lie n t '

s n e e d s /s a te s p itc h : 3 0 %

R e frig e ra to r d e s ig n c o m p le te n e s s a n d a c c u ra c y 3 0 %

C yc le c o m p le te n e s s a n d a c c u ra c y 4 0 %

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e v e ry th in g th e y '

d w a n t it to . T h is s e c tio n s h o u ld b e a p p ro x im a te ly 1 d o u b le - s p a c e d p a g e

s a le s p itc h - te ll th e m a s to ry o F o n e o f th e ir flig h ts a n d h o w p e rfe c tly y o u r re frig e ra to r d o e s

a n d e n e rg y it w ill ta k e o n th e ir p la n e A v o id to o m a n y te c h n ic a l d e ta ils , a n d re a lly m a k e th is a

a ll o f th e th in g s th e y re q u e s te d a n d m o re . T e ll th e m h o w g re a t it w ill lo o k , a n d h o w littie s p a c e

T h is is th e s a le s p itc h y o u w o u ld m a k e to th e c lie n t . T e ll th e m h o w it w ill b e a b le to d o

R e a s o n fo r R e c o m m e n d a tio n

Y o u m a y a s s u m e a ll c o m p o n e n ts o p e ra te re v e rs ib ly .

T o ta l s iz e a n d m a s s .

In s u la tio n tw e a n d th ic k n e s s .

R e frig e ra to r s h a p e a n d i n t e r n a t s to ra g e s p a c e .

C o e ffic ie n t o f P e rfo rm a n c e

A T - s d ia g ra m o f y o u r c y c le , d o n e e ith e r o n th e c o m p u te r o r to s c a le o n g ra p h p a p e r.

M a s s n o w ra te fo r y o u r c y c le .

H e a t tra n s fe r a n d w o rk v a lu e s fo r e a c h p ro c e s s .

S p e c ific a tio n o f flu id te m p e ra tu re , p re s s u re , a n d e n t h a l p y a t e a c h s ta te .

ınternal te m p e ra tu re (lo w te m p re s e rv o ir ).

C y c le ty p e a n d w o rk in g n u id .

Y o u r a n a ly s is n e e d s to in c lu d e th e fo llo w in g th in g s

R e frig e ra to r D e s c rip tio n /A n a ly s is

s h o u ld b e b e tw e e n y z a n d 1 d o u b le - s p a c e d p a g e

yo u m e e t y o u r c lie n t '

s n e e d s , n o t h o w re a lis tic o r p la u s ib le th o s e n e e d s a re . T h is s e c tio n

th e re frig e ra to r . F e e l fre e to b e c re a tiv e a n d h a v e fu n w ith th is y o u w ill b e g ra d e d o n h o w w e ll

g u e s ts w ill th e a irc ra ft b e h o s tin g , a n d th e n u m b e r a n d ty p e s o f ite m s th e y w o u ld w a n t to k e e p in

to w o rk fo r Y o u s h o u ld s p e c ify s o rn e th in g a b o u t th e ir b a c k g ro u n d , w h a t s o rt o f a c tiv itie s a n d

u s e th e re frig e ra tio n u n it ro r F o r th is p ro je c t, yo u c a n c h o o s e w h a t s o rt o f c lie n t y o u w o u łd lik e

in re a lity , yo u r c lie n t w o u ld p ro v id e th is - a d e s c rip tio n o f w h a t th e y

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d like to b e a b le to

C lie n t A n a ly s is

Y o u r re p o rt w ill c o n s is t o f 3 s e c tio n s

R e D O rt

Le h m a n

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