System-Level Design Review Solar Thermal Water Heater. Mike Pastore, Evan Baileys, Deven Greenawalt, Alex Slabyk, Sarah Kirk

Transcription

1 System-Level Design Review Solar Thermal Water Heater Mike Pastore, Evan Baileys, Deven Greenawalt, Alex Slabyk, Sarah Kirk

2 Roles Team Role Team Dynamics Deven Thermodynamics Lead Scribe Sarah Materials Lead Deliverables Evan Structural Lead Supplier Outreach Alex Sustainability Lead Facilitator Mike Project Manager / Communications Scheduling

3 Agenda Review Phase I Problem Description Customer Requirements Constraints Action Item Review Phase II Functional Decomposition Pugh Analysis Benchmarking Morph Chart System Architecture Feasibility Studies Next Steps Action Items Issues and Concerns

4 Review Phase : Problem Description Harvesting the sun to heat water is not a new idea and has been done for centuries, but as technology expands, so does the ability to more effectively capture the sun s energy and put it to use. Solar-thermal water heating systems capture the sun s energy and use it to heat water to very high temperatures. RIT hopes to use this technology to aid in heating the hot water loops that circulate the campus. Of the campus loops, there is main pressurized circulating F loop that feeds into the individual building loops and heats the building water F via a heat exchanger. The goal of this project is to complete a full scale feasibility study, proving that there is merit for installing a solar thermal system here at RIT (these systems already exist, so creation is not the goal). The goal is that a future system will provide the domestic hot water loops in the academic buildings with F water and will achieve an ROI of < 5 years. The implementation of such a system may have many social and economic impacts and is important because: RIT has pledged carbon neutrality by The current system uses natural gas to heat the water, resulting in emissions Natural Gas is inexpensive now, but the price will likely increase RIT is a pioneering school in terms of environmental consciousness

5 Review Phase : CR s and EM s 5

6 Review Phase : Constraints Budget/Funding Weather- when cloudy there will be less available sunlight to collect Time of Year- In the winter there will be less insolation, shorter days, and colder temperatures to work with Time of Day- Sunlight is not constant during the day and is not present at night. 6

7 Review Phase : Action Item Review Team Member Major Action Item (Phase ) Deven Contact Rob Stevens to get more information on solar thermal technologies. Sarah Research materials and existing designs and begin system sketches Evan Continue contact with Apricus Alex Talk to Enid Cardinal to gather CO data at RIT Mike Contact FMS to set up Maintenance Contact and schedule tour of the current boiler system 7

8 Function Decomposition Why How 8

9 Morph Chart 9

10 Pugh Analysis Criteria Assumptions that follow Criteria Definition Cost How much money the system will cost? ET and flat plate have similar costs (we have not found solid data to convince us otherwise) Complexity How complex is the system? Maintenance and construction will be more time-consuming than a less complex system Portability How easy will it be for our team to transport our model through the school/ at Imagine RIT? Model system will be transported by team members Efficiency How well does the system capture the heat energy and transfer that heat into the water? A more efficient system is more desirable; flat plate are more efficient (overall) than ET Seasonal Effectiveness How effective the system is in all seasons? Through flat plate are more efficient, the ET tubes performs better with larger temp changes Durability How long will the system last? (Life span) Longer lifespans rank higher

11 Pugh Analysis Weighted Pugh Non-Weighted Pugh Criteria 5 6 Criteria Weight 5 6 Cost D - Cost D - Complexity A Complexity A Portability T Portability T Efficiency U - - Efficiency U - - Seasonal Affectiveness - M Seasonal Affectiveness - M Durability Durability SCORE - SCORE Weighting may introduce bias, but used as a way to see discrepancies between systems. Weights were assigned before the criteria weights were deliberated by the group

12 Pugh Analysis (assuming cost is not a constraint) 5 na na - na - - na na Total System Score Non-weighted System Concept

13 Pugh Analysis Continued R: Weighted L:Non-Weighted System Concept 5 n a n a n a n a n a Sum Each row show the overall score of that system compared to the Datum The black box in each row corresponds to the datum system for that sequence The Sum row relates how each system scored cumulatively compared to all others regardless of datum

14 Benchmarking

15 System Architecture 5

16 System Flow Chart 6

17 Feasibility Study- Heat Absorption and Area Required 7

18 Risk Assessment Blue colored = New Risk 8

19 Risk Assessment Blue colored = New Risk 9

20 What s Changing? Met with Rich Stein, FMS Controls Manager, 9/9/6 Project Direction changed to focus on Gene Polisseni Center hot water system Preheating of water before going into large storage tank Contacted FMS Special Events Staff Model may be used to: Create hot water at hand washing station for Imagine RIT We know this will change: Item Was Is Now Customer Tom Garland Rich Stein Focus Area RIT hot water loop GPC hot water storage tanks Temperate Goal As hot as possible <F Available Space Essentially unlimited <5ft^ Use Case Domestic hot water demanded Preheat water storage tanks to on campus offset heating load in GPC This may change Item Was May Become Target Solar Technology Evacuated Tubes Flat Plate Collectors Payback Period <5 years Unknown No clear use Used at Imagine for hand washing Model System

21 Next Steps Updated Problem Definition and Customer Requirements per meeting with Rich Stein Obtain data on load capacity of roof Work with Rich to determine roof space capabilities Create detailed designs for a scale model based on a system that can be implemented on Polisseni Center. Identify which solar tech will be best for RIT and look into purchase options Work with Kathleen and Paula (FMS Special Events) to find use for model at Imagine RIT Simplicity of system integration (brand new roof, less holes and mounting the better) Performance in winter (during hockey season) Find vendor Used in some way to provide hot water Understand whether or not payback period calculations are necessary or if the focus is more on a feasibility study and proof of concept function Submit grant application

22 Member Contribution Team Member Phase II Completed Tasks Phase III Predicted Contributions Deven Worked with group on a developing functional decomposition, morphological chart, pugh analysis, and system architecture. Research and compare various detailed prototype flat plate collectors. Feasibility analysis associated with prototypes. Sarah Met with Rob Stevens, drafted the feasibility analysis, sketched potential system piping designs, reviewed building plans. Improving feasibility analysis and gather materials (sensors, pump, sample piping, etc.). Increase understanding of building mechanical room components and functioning. Evan Created draft functional decomposition, draft morph chart, and draft pugh analysis. Worked with team to create final versions of functional decomposition, morph chart, and pugh analysis. Design detailed structure for system Alex Updated risk assessment with new risks since our customer is changing. Updated Gantt chart with Phase III tasks. Manage risk assessment and investigate mitigation solutions Mike Set up meeting with Rich Stein, Contacted Special Events for possible model uses, Contacted Enid Cardinal for model uses, Keep in contact with Rich Stein and Kathleen Rydelek, obtain roof load capacity data,

23 Gantt Chart Yellow Colored = Phase Tasks Purple Colored = Phase Tasks

24 Issues & Concerns Potential for working with glycol could make things difficult. Budget is still an issue Have not found a source of additional funding Will not have the funding necessary to complete a scale model May be behind schedule due to customer changing. Scope Creep

25 Questions?