37. Elements of the answer ‐ Fresh Air (as opposed
to stale)
→ Good Level of Oxygen (O2)
→ Sufficient Air Exchange with Outside
‐ Not too Hot and not too Cold
→ Control of Temperature
‐ Not too Dry and not too Humidity
PresentedBy :A.M.AtiqullahINSTRUCTOR(Tech)RACDHAKA POLYTECHNIC INSTITUTE,Tejgaon,Dhaka.
38. → Control of Relative Humidity
‐ Good Amount of Light,
but no Excess and no Glare.
→ Enough Light,
Preferably Diffuse
‐ Human Dimension to the Context.
→ Appropriate Geometric
Dimensions,
Pleasing Shapes
PresentedBy :A.M.AtiqullahINSTRUCTOR(Tech)RACDHAKA POLYTECHNIC INSTITUTE,Tejgaon,Dhaka.
55. ﮋ evZv‡mi (Dry air) ‡ÿ‡Î,
Pa Va = ma Ra Ta ……………….(1)
GesRjxqev‡®úi †ÿ‡Î,
Pv Vv = mv Rv Tv ……………….(2)
G QvovVa = Vv GesTa = Tv = Td
GLv‡bTd = WªvB evj¦ ZvcgvÎv (DBT)
mgxKiY (1) I (2) bs mgxKiY n‡Z cvB,
Pv
Pa
=
mvRv
ma RaPresentedBy :A.M.AtiqullahINSTRUCTOR(Tech)RACDHAKA POLYTECHNIC INSTITUTE,Tejgaon,Dhaka.
67. 67
THANKS!
Any questions?
You can find me at
atiqullahrac@mail.com
PresentedBy :A.M.ATIQULLAH,INSTRUCTOR(Tech)RACDHAKA POLYTECHNIC INSTITUTE, Dhaka-1208
70. এই ক্লাসটি পূেিায় ফদখরত রভরিট করিা
onlinetvet.com
Presented By : A.M.Atiqullah,INSTRUCTOR(Tech)RACDHAKA POLYTECHNIC INSTITUTE, Dhaka-1208.
71. Presented By : A.M.Atiqullah,INSTRUCTOR(Tech)RACDHAKA POLYTECHNIC INSTITUTE, Dhaka-1208.
72. 2.1 Find the U factor of a) Brick wall without plaster. b) Brick wall with
plaster on one side. c) Brick wall with plaster on both side.
2.2 Find out U value from the chart of hollow tiles, cylindrical blocks,
concrete blocks, etc, of different insulation thickness and K factors.
2.3 Find out the U factors from the chart of common cold storage walls, roofs
and floors at different insulation thickness and K factors
2.4 Solve Problems on relating U factors for common wall of commercial
building and cold storage.
PresentedBy :A.M.AtiqullahINSTRUCTOR(Tech)RACDHAKA POLYTECHNIC INSTITUTE,Tejgaon,Dhaka.
74. 1.Basic Refrigeration and Air conditioning - P. N. Ananthanarayanan
2.Principal of Refrigeration - Roy J. Dossat
3.A text book of Refrigeration and Air-conditioning - R. S Khurmi & J K Gupta
4.A course in Refrigeration and air conditioning - S. C. Arora & S Domkundwar
5.Modern refrigeration and airconditioning for engineers - Prof. P S Desai
6.Refrigeration and air conditioning - C P Arora
7.Refrigeration and air conditioning - Ahmadul Ameen
PresentedBy :A.M.AtiqullahINSTRUCTOR(Tech)RACDHAKA POLYTECHNIC INSTITUTE,Tejgaon,Dhaka.