Material selection
The main purpose of outer material is to provide enough insulation. So minimum heat transfer coefficient is required for the outer material. Other selection criteria are:
1. Cost
2. Environment friendly
3. Availability
Alternatives along with heat transfer coefficient are:
• Wood : 0.19 w/m/k
• Plastics: 0.29 w/m/k
• Polystyrene foam: 0.04 w/m/k
• Polyurethane foam: 0.03 w/m/k
From the above alternative more suitable outer materials are Polystyrene foam and Polyurethane foam. Among them polystyrene is less costly than other one. So polystyrene is selected for prototype.
7.4 Feasibility of technology
Even though peltier is common for small cooling application. It is relevant to check the feasibility of peltier technology …show more content…
Suggested modules are given below
Product Imax (amps) Vmax (volts) Qmax (watts) DTmax Width (mm) Length (mm) Height (mm)
TE-12 7- 2.0-2.5 7.6 16.3 76 72 48 48 4.8
TE-12 7-1.4-1.15 7.9 15.7 76 67 40 40 3.4
HP-127-1.4-1.15-71 8 16.1 80 71 40 40 3.4
VT-127-1.4-1.15-71 8 16.1 80 71 40 40 3.4
TE-195-
1. 0-0. 8 5.8 24.1 86 67 50 25 3.1
7.5 Design of core unit- cooling/heating module
Peltier element with the suitable heat sink is the core cooling and heating component of the proposed design. Because heat extraction power of the peltier element depends on the efficiency of the heat sink or how much heat rejected. So we need additional fan along with the heat sink to speed up the heat extraction there by it produce cold chamber very …show more content…
Hot side of the peltier is attached to the heat sink. Cold part is exposed to the chamber.
7.6 Design of chamber
Double Chamber is used in this prototype, one chamber for cooling and other for heating. As per morphological chart we proposed two model for chamber part.
1. Side by side configuration
2. Top and bottom configuration
Side by side configuration
In this configuration, two chamber placed side by side and core unit is placed at the center. It can be either detachable or not. Core unit (peltier with heat sink and fan)
Cold chamber will be the smaller one compared to the hot chamber. To make it more portable we have provided a necessary seating arrangement at the sink to detach and attach the hot chamber. We can put the whole cooling unit into the hot chamber since the cold chamber is smaller than the hot chamber. This will help to carry the unit where ever we go.
Top and bottom configuration
In this configuration cold chamber is at the top and hot chamber is at the bottom side. Here also the cold chamber is small and we can make the whole structure as detachable type or not.
Battery and display
The main purpose of outer material is to provide enough insulation. So minimum heat transfer coefficient is required for the outer material. Other selection criteria are:
1. Cost
2. Environment friendly
3. Availability
Alternatives along with heat transfer coefficient are:
• Wood : 0.19 w/m/k
• Plastics: 0.29 w/m/k
• Polystyrene foam: 0.04 w/m/k
• Polyurethane foam: 0.03 w/m/k
From the above alternative more suitable outer materials are Polystyrene foam and Polyurethane foam. Among them polystyrene is less costly than other one. So polystyrene is selected for prototype.
7.4 Feasibility of technology
Even though peltier is common for small cooling application. It is relevant to check the feasibility of peltier technology …show more content…
Suggested modules are given below
Product Imax (amps) Vmax (volts) Qmax (watts) DTmax Width (mm) Length (mm) Height (mm)
TE-12 7- 2.0-2.5 7.6 16.3 76 72 48 48 4.8
TE-12 7-1.4-1.15 7.9 15.7 76 67 40 40 3.4
HP-127-1.4-1.15-71 8 16.1 80 71 40 40 3.4
VT-127-1.4-1.15-71 8 16.1 80 71 40 40 3.4
TE-195-
1. 0-0. 8 5.8 24.1 86 67 50 25 3.1
7.5 Design of core unit- cooling/heating module
Peltier element with the suitable heat sink is the core cooling and heating component of the proposed design. Because heat extraction power of the peltier element depends on the efficiency of the heat sink or how much heat rejected. So we need additional fan along with the heat sink to speed up the heat extraction there by it produce cold chamber very …show more content…
Hot side of the peltier is attached to the heat sink. Cold part is exposed to the chamber.
7.6 Design of chamber
Double Chamber is used in this prototype, one chamber for cooling and other for heating. As per morphological chart we proposed two model for chamber part.
1. Side by side configuration
2. Top and bottom configuration
Side by side configuration
In this configuration, two chamber placed side by side and core unit is placed at the center. It can be either detachable or not. Core unit (peltier with heat sink and fan)
Cold chamber will be the smaller one compared to the hot chamber. To make it more portable we have provided a necessary seating arrangement at the sink to detach and attach the hot chamber. We can put the whole cooling unit into the hot chamber since the cold chamber is smaller than the hot chamber. This will help to carry the unit where ever we go.
Top and bottom configuration
In this configuration cold chamber is at the top and hot chamber is at the bottom side. Here also the cold chamber is small and we can make the whole structure as detachable type or not.
Battery and display