EPS@ISEP | The European Project Semester (EPS) at ISEP

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
report [2019/06/23 15:47] – [7.2 Architecture] team2report [2019/06/26 18:54] (current) – [7.6 Tests and Results] team2
Line 1734: Line 1734:
 </WRAP> </WRAP>
  
-On Figure {{ref>trays}}, it is visible that the solar dehydrator has four trays. In total, there is a space of 5 cm by 5 cm to place the fresh food to dehydrate. +On Figure {{ref>trays}}, it is visible that the solar dehydrator has four trays. In total, there is a space of 50 cm by 50 cm to place the fresh food to dehydrate. 
 They are made out of wood and a metal mesh.  They are made out of wood and a metal mesh. 
 Through a hinged door, it is easy to place the food on the trays. Through a hinged door, it is easy to place the food on the trays.
Line 1745: Line 1745:
 </WRAP> </WRAP>
  
-Figure {{ref>fandetail}} gives a detailed view of the fan. Through the closing lid, pushed by a servo motor, the air flow is optimized. The position of the servo motor depends on the humidity and temperature inside the cabinet. These two parameters are measured by sensors. This controlling system, in combination with the fan, ensure the optimal conditions to dehydrate the food.+Figure {{ref>fandetail}} gives a detailed view of the fan. Through the closing lid, pushed by a servo motor, the air flow is optimized. The servo motor is turned on or off depending on the humidity and temperature inside the cabinet. These two parameters are measured by sensors. This controlling system, in combination with the fan, ensure the optimal conditions to dehydrate the food.
  
 <WRAP centeralign> <WRAP centeralign>
Line 1930: Line 1930:
 ³ = while turning, with a delay of 20 ms per 1° angle (most power efficient) ³ = while turning, with a delay of 20 ms per 1° angle (most power efficient)
  
-When knowing that the total calculated power consumption of the device will be roughly about 1.65 W, you can calculate the total run time of the device during the night. So when no power comes from the solar panel the battery can provide power to the DryFoo for roughly 5 and a half hours. This is calculated by dividing the power consumption by the battery voltage to get the discharge current needed from the battery. By dividing the nominal capacity of 2400 mAh with the discharge current of 430 mA, the time will roughly be 5.48 hours. +When knowing that the total calculated power consumption of the device will be roughly about 1.65 W, the total running time of the device during the night can be calculated. So, when no power comes from the solar panel the battery can provide power to the DryFoo for roughly 5 and a half hours. This is calculated by dividing the power consumption by the battery voltage to get the discharge current needed from the battery. By dividing the nominal capacity of 2400 mAh with the discharge current of 430 mA, the time will roughly be 5.48 hours. This is calculated with both the servo motor and the fan running constantly.
  
 ==== - Functionalities ==== ==== - Functionalities ====
Line 2112: Line 2112:
 </WRAP> </WRAP>
  
 +The team tested the prototype by inserting food to dehydrate. Figure {{ref>foodbefore}} shows the state of the different food before starting the dehydrating process.
 +
 +<WRAP centeralign>
 +<figure foodbefore>
 +{{ :testfoodbefore.jpg?direct&250 |}}
 +<caption>Food before drying</caption>
 +</figure>
 +</WRAP>
 +
 +Figure {{ref>foodafter}} shows their status after approximately seven hours.
 +
 +<WRAP centeralign>
 +<figure foodafter>
 +{{ :testfoodafter.png?direct&700 |}}
 +<caption>Food after drying seven hours</caption>
 +</figure>
 +</WRAP>
 +
 +Besides the kiwi, all other types of food tested showed visible signs of dehydration. In the case of the cherries, mushroom, and bananas, these signs were significant. In the case of the apples, the drying process is about half-way done, as expected, according to Table {{ref>typeoffood}}. The reason the kiwi hadn't yet shown much change is due to the fact that kiwi is made at 83 % of water.
 ==== - Conclusion ==== ==== - Conclusion ====
  
Line 2137: Line 2156:
   * Internet of Things: allowing the user to be connected and to control the dehydrator at any time and from anywhere.   * Internet of Things: allowing the user to be connected and to control the dehydrator at any time and from anywhere.
   * Rotating system: having the system rotate according to the radiation of the Sun, to always catch the maximum amount of sunlight.   * Rotating system: having the system rotate according to the radiation of the Sun, to always catch the maximum amount of sunlight.
 +  * Increasing the angle of the solar heat catcher to increase solar energy capture.
 +  * Touchscreen instead of LCD and buttons as the user interface.
 +  * Maritime plywood for the straight parts of the product for being definitely waterproof.
 +  * higher precision components, low power fan,arduino nano (lower power consumption)
 ===== Appendices ===== ===== Appendices =====
 === 1. Sponge Experiment === === 1. Sponge Experiment ===

Trace:

QR Code
QR Code report (generated for current page)