Enara
Project undertaken in course year 2022-23 with Mawa Modular
Project Goal
Enhance modular housing for refugees in Jordan, developing modular energy systems for each housing unit. Specifically, to develop an off-grid system that will provide as much energy as possible for less than $1000, providing supplementary power to what the shelters already receive from the grid.
Project Motivation
There are over 6.8 million Syrian refugees in Jordan, having been displaced from their homes due to the Syrian civil war. The average time living in these refugee camps is now over 17 years, yet the families live in tents that function for 6 mos to 5 years.
A critical problem these people face is reduced energy availability during unpredictable spikes in energy supply and demand. On average energy is available for nine hours per day. A modular energy system for each housing unit would reduced reliance on the centralized energy plant, and provide independence during power outages.
Background
Mawa Modular is an organization looking to develop modular housing for these refugee camps with longer life spans that provide stability and dignity for the residents.
Solar power has been very effective in Jordan due to its hot and sunny climate. The existing power grid in the refugee camps is provided by a solar power plant, that is able to provide 80% of the energy needs.
High Priority Requirements
Provide as much power as possible for under $1000
System installation shall require only simple tools
System shall weigh less than 100 pounds
System shall not induce water leaks
System shall withstand local sun, snow and wind loads
System shall have energy storage sufficient for 5 hours of use
Ethical Considerations
Balance of energy provided to meet users needs vs the cost of the system
Safety
Understanding the perspectives of the refugees
Solution
We developed a solution consisting of a single 200W solar panel, mounting system to hold the panel at 27 degrees, a lead-acid battery, charge controller and micro-inverter
Full system
Schematic showing the full system design, along with associated costs of the components.
Bracket
Bracket to hold the 200W panels. It is large enough to hold 4 such panels, providing adequate space for expansion if needed. It is designed to hold the panels at a 27-degree angle (13 degrees from the roof, which is at 14 degrees)
Electrical overview
DC Coupling mechanism. In this system design, the inverter receives DC power, converts to AC, and transmits that into home appliances while any excess energy is returned to the grid.
Deflection on bracket holding weight of panels
WHen loaded with the weight of the panels, max deflection was seen at 0.06 mm
Pressure on bracket due to wind loads
Wind loads were input into COMSOL, and a maximum pressure was determined to be 165 Pa. This created a max load of 235 N.
Bracket leg deflection
With the max load determined, the max deflection of the individual legs were determined to be 0.115mm
Testing of bracket leg
The red arrow points to the bracket under test, and the white arrow points to the weights applied. Deflection of the leg was measured
Horizontal leg deflection test results
The leg saw displacement up to 0.20 inches (5mm) when tested up to 18 kg (176N). This was more than predicted with FEA, though we observed that the clamps holding the bracket may have moved slightly during the test.
Other work conducted
Deflection (Vertical) testing
Leakage testing
Power efficiency and Performance Ratio calculations using PVSyst
Student team
Jordan Trip
The Enara and Bestagons teams visited Jordan in December 2022, to meet with members of Mawa Modular, UNHCR, Oxfam and Maani to learn more about the lives of the refugees, and the manufacturing process for their proposed solutions. And to have some fun along the way!
Future Work
Finalize costing of the components
Build system onsite in Jordan for installation and performance testing