P17483: Solar Transpired Collector Crop Dryer
/public/

Integrated System Build & Test with Customer Demo

Table of Contents

Team Vision for System Level Demo with Customer

During this phase team P17483's plan was to complete all construction, as the Gantt Chart indicated we were behind schedule. During this phase we also wanted to accomplish outdoor testing of the entire system. What we actually accomplished was 2 full integrated system tests on Monday April 10th and Friday April 14th. The decisions made during this phase was to introduce thinner banana slices to the system as results from the first test indicated that the fruit may not meet desired moisture content in one day test.

Friday April 14th Test

On 4/14/2017, a full system integrated test was conducted. The preparation included the weighing and labeling of trays, as well as the chopping/spreading of banana slices. After the bananas were sliced, spread out and weighed they were ready to be put in the prototype. We also had to move the sections of the prototype into the Pi quad and set up our measurement devices to record our data. It took about three and a half hours from start to having the prototype ready to dry some fruit. Maintenance of the test included periodic supervision of the prototype and the data being recorded. This ended up being beneficial because we had neglected a few holes and loose ends at the start that needed to be sealed up in order to get accurate results. Once we had that in order we were able to gather accurate data from the test (we had an issue with the hook up of our second humidity sensor so that data was left out of the results). End clean up went rather smoothly. We needed to take final weights of the trays with bananas and then proceed to disassemble and transport prototype sections back to the 4th floor. It took about an hour and fifteen minutes.

The data that we collected includes different temperature measurements at various locations and two humidity measurements:

Measurement Description
T1 Ambient Temperature
T2 Collector A exit shallow
T3 Collector A exit center
T4 Collector B exit shallow
T5 6 inch above last tray before Chimney
T6 Chimney Exit
RH1 Ambient relative humidity
RH2 Relative humidity in chimney

Test Results Summary

Sample temperature data from midpoint of test, to show temperature increase through system

Sample temperature data from midpoint of test, to show temperature increase through system

Solar Flux Hitting the Collector

Solar Flux Hitting the Collector

Data Results for the Mass of Bananas

Data Results for the Mass of Bananas

The assumption is that the bananas have a 75% moisture. From this test we were able to remove about 82% of the moisture content (our goal is to have 10-15% moisture content left). Having only done a six and a half hour test logically this leads us to believe it would definitely be possible to reach our goal if we get a full 8 hour test in during the prime hours of the day. From the solar flux test we see that when we are outside our ideal drying times the flux drops very rapidly which slows the rate in which we can dry. We will try to avoid this in future tests to improve our results.

Summarize test results and assess effectiveness of test plans to unambiguously demonstrate satisfaction of the engineering requirements

Pictures of Test

Entire System Integrated

Entire System Integrated

Test Plans Progress

Status Evaluating Engineering Requirements

Status Evaluating Engineering Requirements

Risk and Problem Tracking

Many of our risks from this phase have been reduced or brought to zero. The following are some explanations for a few of the risks:

Functional Demo Materials

From meeting with our customer we gained more insight on what we should be getting out of and expecting from our full tests. Also provided some suggestions on how to improve our test for next time. Here some links to our notes from the review

Plans for next phase

As a team we want to have completed a full system test with further model validation. The idea is to collect more weight measurements taken throughout the day. Additionally, we would like to reach the goal moisture content by getting a full 8 hours of testing completed during prime daylight hours.

Home | Planning & Execution | Imagine RIT

Problem Definition | Systems Design | Preliminary Detailed Design | Detailed Design

Build & Test Prep | Subsystem Build & Test | Integrated System Build & Test | Integrated System Build & Test with Customer Demo | Customer Handoff & Final Project Documentation