The Water BendersFinal Presentations

Outline• Introduction•Project Description•Motivation•Problem Statement•Objectives•Customer Requirements•Design Concepts•Functional Schematic•Design Concept•Concept Evaluation•Finalized Concept•Electrical Schematic •Mechanical Schematic•Pseudo Code

•Proof of Concept•SolidWorks Model•SolidWorks Fluids•Results and Discussion•Conclusions•Parts Inventory•Future Works

Project Description•To design and manufacture a cold water waste recovery system for a shower head.

Motivation•There are third world countries that do not have a readily supply of water available.

• In the U.S., alone, 1 household annually waste an estimated 3 thousands kilowatts of energy from hot water running down the drain. With an average cost of $0.07 per kilowatt-hour, this equates to an annual waste of 210 dollars.

Background •Change to the plumbing to allow cold water to be feed back into the system. (Patent 5274860)•Reuse of waste shower water for filling a toilet cistern.( Patent 2305899)•Water temperature regulator that guides water having a temperature lower than the desired value to a storage for reuse. (Patent 609213)

Objective•Design a convenient showering apparatus that does not waste water.

Customer Needs

Functionality•Reuse the cold water•Prevent the loss of hot water •Hot water remains at the shower head until ready for use•Comfortable water temperature discharge. •Statically sound ( no vibration)•Minimal use of electricity

Ergonomics Easy to install and service•Do it yourself installation•No need for a plumber or electrician •Small enough to fit in a shower

Operate well under showering conditions

Design Parameters•Dimensions limits•8 inches in depth •30 inches in height•24 inches in width

•4 gallon tank•2gpm exiting shower head•Minimum Cold water temperature •Maximum Hot water temperature •45 psi hydrostatic pressure

Standards and Codes•ASME Water Quality Guidelines•Watersense Regulation•Department of Energy Codes•NY Federal Plumbing Code•LEED and Green Building Code•Temperature •Water pressure •Flow rate

Design Concepts

Functional Schematic Diagram

Main Line

Hot Water

Shower Head

Cold Water Tank

Concept Evaluation•Mechanical: Divert water into the tank •Mechanical: Getting the water out of the tank•Electrical: Aruindrio vs. Switches

Water Diverter

Concept 1: Thermal Wax Actuator

•Temperature Sensitive •Customizable•No Power Consumption

Concept 2: Solenoid Diverter Valve

• Inexpensive•Easily controllable• Low power consumption

Decision MatrixParameters Weight Thermal

Actuator3/2

DirectionalValve

Cost 1 - +Simplicity 1 - +Manufacturability 3 - +Bypass Features 2 - +Energy Efficiency 3 + -Ability to Divert 4 + +

Total 0 8

Tank Water Extraction

Concept 1: Gravity

Concept 2: Pump

Cold waterPump

Decision MatrixParameters Weight Gravity Pump

Cost 1 + -

Complexity 1 + +

Maintenance 2 + +

Durability 2 + +

Manufacturability 2 + +

Ease of Operation 2 - +

Green 3 + -

Portability 3 + +

Ability to Empty Tank 4 - +

Total 8 12

Electrical Control System

System Requirements•Temperature Sensing – Diverter Selecting•Button Activation – Flow Enabling•Water Level Sensing – Pump Operation•System State Reset•Shower Operable under Malfunction Conditions*

Testing Scenarios•Normal use – User takes a hot shower for a duration period long enough for the tank to empty.•Short shower – User takes a hot shower for a duration period too short for the tank to empty.•Cold shower – User takes a cold shower for an unspecified amount of time.•Bypass/Unpowered – User desires an immediate supply of water and wishes to bypass the tank.

Concept 1: Control by Switches NC = Normally

ClosedNO = Normally Open

Concept 1: Control by Switches

Concept 2: Control by Arduino

Concept 2: Control by Arduino (cont.)

Control Subsystem Decision Matrix

Electrical Control SubsystemCriteria Weight Control by

SwitchesControl by

Arduino

Simplicity 2 - 0Cost 3 + 0

Ease of Adjustment 3 - +

Manufacturability 1 + +Efficiency 2 + -

Serviceability 2 0 +Weighted Total   1 4

Finalized Concept

•Solenoid Diverter Valve•Pump to exact water from the tank•Arduino to control valves and other electrical components

Proof of Concept

Testing Scenarios•Normal use – User takes a hot shower for a duration period long enough for the tank to empty.•Short shower – User takes a hot shower for a duration period too short for the tank to empty.•Cold shower – User takes a cold shower for an unspecified amount of time.•Bypass/Unpowered – User desires an immediate supply of water and wishes to bypass the tank.

Mechanical Schematic

Electrical Schematic

SolidWorks Model

Flow Simulation

Results

Pressure Plot

Temperature Plot

Future Goals

Goals for Next Semester•Manufacture Prototype•Optimize Design Parameters•Water Regulation Codes•Reduce size•Reduce Cost •Implement New Technology•Automatic Power off for system•Battery charge indicator•Inline Turbine Trickle Charge

Parts Inventory• 5 Diodes• 5 Resistors• 5 Transistors • 5 LEDS• 1 Capacitor• 3 Solenoids• Arduino Microcontroller• Bread Board• Batteries

• 2 Buttons• 3 Check valves• Shower Head• Pump• Diverter Valve• 2 Temperature Sensor• 2 Pressure Sensor•Water Level

Sensors• Tank• Piping• Relay• Dry wall• Hardware

QuestionsFor more information check out our

websitewww.ccnywaterbenders.weebly.com