UNIT Of Refrigeration
TR:1TR is amount of heat to be extracted from the atmosphere for melting one metric for of in 24hrs
1TR:12000 BTU/HR
1TR: 3000 kcal/hr
=500 kcal/mn
STEP OF SELECTING THE SYSTEM
- Calculation of cooling load requirement
- Selection of techno-ecomical system
- Equipment selection
- Designing air distribution system
- Designing water distribution system
- Designing refrigerant distribution system
- Evaluation of system to be used.
Factors to considering during cooling load requirement
- Building detailed layout
- Use of space
- Physical dimension of space
- Inside room design condition
- Filtration level required
- Ambient condition
- Glass area exposed to sun
- Occupancy
- Lighting load
- Equipment load
- Fresh air requirement
- Infiltration of out side air
Factors affecting system selection
- Budget of client
- Need/requirement of client
- Use of space
- Out side condition
- Floor layout
- Location and dimension of beam/column
- Power availability
- Space availability and many more.....
Types of air conditioning system
Dx-system - Direct Expansion
- A direct expansion air conditioning (DX)SYSTEM uses a refrigerant vapour expansion compression (RVEC)Cycle to directly cool the supply air to an occupied space
- DX system (both packaged and split)
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