Preliminary Detailed Design Review Solar Thermal Water Heater Mike Pastore, Evan Baileys, Deven Greenawalt, Alex Slabyk, Sarah Kirk Mike

Agenda Phase II Review Units Explanation Bill of Materials Scale Vs Full Size Differences ET Vs Flat Plate Decision Our Proposed Collector & Pump Updated Use Case System Stand & Plumbing Potential Test Plans Risk Assessment Updated Schedule What’s Next Agenda Mike

Important Updates: Budget Increased from $500 to $1,000 Were able to calculate/model solar flux on campus Integral in making decision on solar technology Vendor was contacted for solar system quote (we will talk about later) We are beginning to fully understand plumbing requirements Mike

Review Phase 2: CR’s and EM’s Alex

Important to Understand One useful metric for decision making is the cost per BTU: $/BTU RIT pays ~ $4/ 1,000,000 BTU = $4 x 10^-6 /BTU We now need to understand the $/BTU for our system over certain time frames to understand the overall cost. RIT will see it advantageous to purchase a system contingent that: it warms the water above the current holding temperature The $/BTU of the system < $4 x 10^-6/ BTU We need to find the optimum number of BTU to add to the holding tank (750gal) that will offset the cost for the heating tanks (900gal) to add the same number of BTU. At that point, our system becomes desirable. Mike

Insolation Unit Explanation Watts [W]: The rate at which energy is consumed or produced Watt-hour [Wh]: Energy production equivalent to one watt for one hour. Sample Problem: How much heat does a sample plate produce per unit area in a day? Assume the plate produces useful energy at a rate of 10 Watts per square meter [W/m^2] for 4 hours [h] every day [d]. 10 [W/m^2] x 4 [h]= 40 [Wh/m^2]. Assume this is the daily total production from the plate. Therefore the sample plate produces 40 [(Wh/m^2)/d] which is the absorbed solar insolation over the day. It is the summation of the energy production of the plate in each useful hour over the time period of interest (one day in this example). [(Wh/m^2)/d] is equivalent to [W/m^2] in this instance, however, the former is a more thorough and accurate description. For more information go to: http://www.3tier.com/en/support/solar-online-tools/what-are-units-solar-irradiance/ Sarah

How does the model differ from GPC? What is in Gene Polisseni Center? What is in the model? Rationale Glycol with water Just water If glycol is used, the team would need a heat exchanger Heat Exchanger No heat exchanger Glycol is not being used for the model Placed on a roof Placed on the ground Not easy accessed on the roof for tests Uses 70°F water as inlet temperature Uses tap water (50-60°F) as inlet temperature The Polisseni Center already has a tank that holds 70°F water Cannot exceed 140°F water Cannot exceed 130°F water Standard for warm water is 140°F. For the model the pump cannot exceed 130°F water Mike and Alex

Flat plate and Evacuated Tube Comparison - Efficiency Deven

Flat plate and Evacuated Tube Comparison - BTU Output Deven

Flat plate and Evacuated Tube Comparison - Annual BTU Output Deven

Monthly Heat Data- Flat Plate Feasibility Analysis Sarah Based on the spreadsheet output for useful heat gain for a flat plate collector. The lower output temperature required, the more water can be produced at that temperature neglecting any piping heat losses.

Preliminary Bill of Materials Mike The sun shield is not the important, and will only be created if we have enough funding for it. Reservoir may be able to be rented through FMS rather than purchased

The Collector: Flat Plate Important Datasheet Information: Parameter Value Dimensions 50” X 85” X 4” Weight (Full) 122 LBS Flow Rates Minimum: 0.17 GPM Maximum: 0.50 GPM Stagnation Temperature 392F Efficiency ~82% (Based on absorber area) The reason we chose THIS plate is bec they were able to give us a huge discount Mike

Proposed Pump Shurflo Deluxe 24V Delivery Pump Max flow rate of 3.0GPM Head of ~120FT Would need to run at lower voltage and possibly add restrictor valves to plumbing in order to achieve required GPM for collector After speaking with supplier (Northern Arizona Wind and Sun) this should not be an issue Evan https://www.solar-electric.com/2088-474-144.html

Use Case Alex This use case is of, if the model generates too hot of water.

Preliminary Stand Design Evan Main concern is fitting through doorways. Revision to make smaller width? Find place to store with larger doors?

Preliminary Plumbing Diagram Evan

Testing Plans We do not have specific test plans designed yet, though we have given thought to which aspects of our system are in need of testing Test Area Why? Proposed Testing Achievable Water Temp Need to understand the max temp achievable before giving final recommendations Circulate predetermined volume of water (40gal) until temperature reaches stagnation Energy Transferred Understand how water is being heated each pass Pass some amount of water through without circulation and test temp as it exits Performance in Weather Understand how plate reacts in weather Test during rainy day/ cloudy day/ cold day/ sunny day/ etc Evan Each of these can include efficiency metrics, cross checking with theorized values, and repeat verification

Risks Alex Green Cells = New Risks

Risks Alex Green Cells = New Risks

Risks Alex Green Cells = New Risks

Gantt Chart Yellow Colored = Phase 3 Tasks Alex Yellow Colored = Phase 3 Tasks Blue Colored = Phase 4 Tasks

Review Phase III: Action Item Review Team Member Phase III Contributions Phase IV Predicted Contributions Deven Research and compare various detailed prototype flat plate collectors. Feasibility analysis associated with prototypes. Improve/update collector efficiency model. Keep in contact with Dr. Stevens Sarah Improving feasibility analysis and gather materials (sensors, pump, sample piping, etc.). Increase understanding of building mechanical room components and functioning. Lay out piping schematic(s) and prepare draft and final designs, help to develop test plans, and develop data recording spreadsheets. Evan Design detailed structure for system Continue design of support structure. Make final design from preliminary design. Detailed drawings of all components. (Mid-phase review to critique proposed final design?) Alex Manage risk assessment and investigate mitigation solutions Manage risk assessment, and update schedule to include MSD II Mike Keep in contact with Rich, contact vendors and negotiate prices, Talk to vendors and initiate purchase of pump and flat plate. Work with Rich to compile heating data All

List of designs that need to take place next phase Final system stand design including fully detailed drawings of all components Fully detailed plumbing diagram with all fittings and valves specified Fully detailed sunshield design To be built and implemented should time/funding allow Evan

Issues & Concerns Scale model and Full Scale designs have several key differences which may skew comparison results Storage for the model once the project is complete and Imagine RIT is complete Sarah

Questions?