Senior Design: Steam Heat Controller

Team Members: Curtis Mayberry, Ben Cao, Thinh Luong, Ben Jusufovic

Advisors: Lee Harker, Jason Boyd

Problem Statement Constraints High-level Design Expected deliverables Possible Issues Budget Schedule

Overview

Currently, the old section of Coover utilizes steam valves in order to heat adjacent rooms. In extreme cases, one steam valve controls the temperature in five different rooms through five radiators. This leads to temperature offset in the rooms and continuous adjustment of the valve in order to accommodate the individuals within each room.

Problem Statement

Temperature Sensors controlled by wireless Mechanical implementation Temperature differentiation between rooms Financial budget: $1000 (not finalized) Plant restrictions (heat output)

Constraints

Mechanical system Wireless interface between temperature

sensor and controller PID Temperature Controller Network interface Room temperature profiling Temperature sensor located in control panel LCD user interface building profiling Interface with Johnston Control equipment?

High-level Design

Overall Design

User Interface

Controller Box

One controller per valve◦ Ability to communicate through ISU network

Functional control panel◦ LCD interface◦ Communicate with controller◦ One temperature sensor per room

Expected Deliverables

Conflicting Temperature Preferences ◦ 2 to 5 rooms with multiple control panels

Limited mechanical experience Part’s lead time Need an adaptable system

◦ Variety of environments

Possible Issues

Controller Box Budget

MODULE ITEM DESCRIPTION VENDOR COUNT PRICE/UNIT PRICEDC motor 12VDC/21RPM Gearhead Motor/Tach-Used MPJA 1 36.95$ 36.95$ Motor driver circuit LMD18200T Digikey 1 17.78$ 17.78$ Metal platform 1 15.00$ 15.00$ Tranceiver Digi Zigbee PRO XBee Digi 1 20.00$ 20.00$ AC to DC power supply 1 20.00$ 20.00$ Miscellaneous Components ECPE 1 5.00$ 5.00$ Micro-controller 1 30.00$ 30.00$ Malfunction alarm beeper 1 1.00$ 1.00$ Ethernet controller 1 10.00$ 10.00$ PCB 1 33.00$ 33.00$ Total 188.73$

Controller Box

Control Panel Budget

MODULE ITEM DESCRIPTION VENDOR COUNT PRICE/UNIT PRICETemperature sensor IC TEMP-VOLT CONV PREC SOT23B Digikey 1 0.70$ 0.70$ LCD NHD-C12864MZ-NSW-BTW or F-55472GNBJ-LW-CAN Digikey 1 16.00$ 16.00$ Transceiver Digi Zigbee PRO XBee Digi 1 20.00$ 20.00$ Miscellaneous Components ECPE 1 5.00$ 5.00$ Micro-controller 1 20.00$ 20.00$ Malfunction alarm beeper 1 1.00$ 1.00$ Battery 2 AA batteries 1 4.00$ 4.00$ PCB 1 33.00$ 33.00$ TOTAL AMOUNT 99.70$

Control Panel

Total Cost Estimate

MODULE ITEM DESCRIPTION VENDOR COUNT PRICE/UNIT PRICEController Panel 3 99.70$ 299.10$ Controller Box 1 188.73$ 188.73$ Zigbee Development Kit 1 200.00$ 200.00$ Subtotal 1 200.00$ 687.83$ LABOR COST Hours Pay/Hour PRICEBen Jusufovic 300 28.84$ 8,652.00$ Ben Cao 300 28.84$ 8,652.00$ Curtis Mayberry 300 28.84$ 8,652.00$ Thinh Luong 300 28.84$ 8,652.00$ TOTAL AMOUNT 35,295.83$

Total Estimate

Based on $60000 /year estimate from Career services

Gantt Chart

Testing and Verification of Prototype

Fabrication and Integration of Prototype

Detailed Design

Order Prototype Components

Design Research

Project Proposal

Discuss Roles

8/10/2010 8/30/2010 9/19/2010 10/9/2010 10/29/2010 11/18/2010 12/8/2010 12/28/2010

Gantt Chart

Start Date Completed Remaining

https://spreadsheets.google.com/viewform?formkey=dFE5Qk1aaGVuNXJfNjgwUW4zbTZ2ZFE6MQ

Tracking Our Progress

Questions?