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Group 16: Efficient HVAC SystemDaniel Galarza, CpEChung Chien Hsia, EEKevin Ivy, EEMarvin Fernandez, CpEMentors: William Carson Sr. and William Carson Jr.Sponsors: Workforce Central FloridaMotivation Natural Air EnergyHVAC = Heating, Ventilation and Air ConditioningMassive household energy consumptionDifferent needs for different climatesHumidity almost never consideredMake improvements on the previous version of this project.Project HistoryiTemp First designIneffectiveSoftware was slowDid not have a hardware simulation for AC Unit

Efficient HVAC System Second designExpensive, and excessive components (Panda Board)Mobile Application and Website never completedProject OverviewWeb connectivityWebsite that can control an HVAC systemMySQL Database for storing user entriesMobile Phone Application that mimics websiteHardware simulator based on redesign of HVAC system

SpecificationsMySQL Database stores user informationSecure login for usersSecure login for advanced administrator functionsWebsite accessible by mobile and desktop browsersHardware reads temperatures & humidityCO2 SensorMachine to Machine CommunicationProject Block Diagram

Software

Software Areas

MySQL DatabaseStores HVAC system dataStores customer and administrator credentialsTemperature, Humidity, Tolerance controlSeven Day Scheduler ProgrammingBasic User Settings storedAdvanced Administrator Settings stored

Website ApplicationAllows a user to control their home HVAC system from a web browser.Based on the format of previous screens.Has all the same functions of the previous system.Obtains all of the consumers changes from their specific entries within the database.Website Application - ToolsControl and monitor a users HVAC system from a desktop or mobile web browser.PHP For coding database interactionSQL Direct communication with DatabasejQuery/AJAX Dynamic, automatic updatingDreamweaver hand coding PHP and SQLGator Host www.naturalairenergy.comMobile Software ComparisonsAndroidiOS (iPhone)SDK is freeMany different software programs available that supports AndroidPrimary language is JavaSDK is $100 roughlyFew other software programs are compatible with itPrimary language is Objective-CMobile Website SolutionjQuery Mobile provided a third optionMobile Website similar to main websiteAccessible to a various phones such as Android and iPhoneNo development feesWorks on most mobile browsers and formatsAccessed using the /m website address

Main Page

User Settings

Seven Day Scheduler

Administration

Mobile Version

MySQL Database

User Activity Diagram

HardwareHardware Areas

Hardware SimulatorDevelopment KitPIC 32 MicroprocessorEthernet Board Daughter PictailWi-Fi Board Kit Dev. Zerog 802.11 PIC32 I/O Expansion Board

Board Expansion PIC32 I/O132-pin Starter Kit connectorOptional 9V DC Inlet with 3.3 and 5 volt regulatorsTwo 2x30-pin header footprints Two 120-pin PICtail Plus daugther card sockets120-pin PICtail Plus edge connector

Temperature Sensor ILM34 (Precision Fahrenheit Temperature Sensors)Linear +10.0 mV/F scale factorOperates from 5 to 30 voltsLess than 90 A current drain (small power consumption)0.8C accuracy (normally)

Temperature Sensor II

This setting works ranging from +5 to +300F

26Humidity SensorCHS-MSS (TDK)Compact sizeLow current consumption.Debug the humidity directly with a voltmeterMeasuring range from 20 % to 85 % RHNominal Accuracy is 5 % RHOperating Condition : 0 to +50C (in 5V)

CHS-MSS Characteristic Three pin GND, Vin, VoutLinear relationship (RH VS Output Voltage)1V 100 % RH0.8v 80% RH

CO2 Gas SensorParallax Inc 27929Power requirements: 6.5 - 15 VDC @ 160 mA (Sense Mode) / 2 mA (Standby)Gas over-limit alarmPrice: $39.994 pin connection- E1 (Heat switch)0-12V -E3 Vin (6.5-12V)E2 (Alarm output)0-3.3V -E4 GndNoted :First time use need to do the calibration

Analog to Digital Converter (ADC)Most controller is digital in nature (PIC32 is same)Only recognize High and Low (0 or 1)Need ADC to convert voltage reading to digital representation10 bits ADC in PIC 32 (from 0-3.3 V)3.3 V/(2^10) = 3.22 mV (precision of reading)PIC 32 has 2 multiplexer for ADC

PCB Layout

Roles in the ProjectBudget and Financing PartPart NumberPriceTemperature SensorLM34Free Humidity sensor (*2)CHS-MSS$40.00Microchip ProcessorPower Supply579-AC162039$34.18BOARD DAUGHTER GRAPHIC PICTAILAC164127-3-ND$190.18Main PCB$70.80Tool supply (for self fabricate PCB)$90.06Wireless RouterN/AFreePIC32 USBII Starter KitDM320003-2$55.00Fast 100 Mbps Ethernet PICTAIL Daughter Board AC164132$50.00ZEROG 802.11 Wi-Fi BoardAC164136-4$60.00LCD TFT 7" 800X480 White Touch PanelNHD-7.0-800480WF-CTXI#-T$107.00I/O Board ExpansionDM320002$72.00DreamweaverN/A$130.00Shipping$90.00Total$989.22Questions?We will then begin a demonstration.http://www.naturalairenergy.com/hvachttp://www.naturalairenergy.com/m/