Brandon Schulte Senior, Mechanical Engineering

Slides:

Advertisements

Similar presentations

J.B. Speed School of Engineering University of Louisville KEEPS Energy Management Toolkit Step 2: Assess Performance & Opportunities Toolkit 2J: Building.

Advertisements

Guidelines and Required Codes That Affect Building Design

Building Envelope. Energy Conservation House design and orientation Lifestyle changes Energy efficiency.

Environmental Controls I/IG Lecture 14 Mechanical System Space Requirements Mechanical System Exchange Loops HVAC Systems Lecture 14 Mechanical System.

Heating and Air Conditioning I Principles of Heating, Ventilating and Air Conditioning R.H. Howell, H.J. Sauer, and W.J. Coad ASHRAE, 2005 basic textbook/reference.

Heating Systems Forced Air Systems.

Coupling a Network HVAC Model to a Computational Fluid Dynamics Model Using Large Eddy Simulation Jason Floyd Hughes Associates, Inc Fire + Evacuation.

WEATHERIZATION ASSISTANCE PROGRAM STANDARDIZED CURRICULUM Overview Introduction to the Weatherization Assistance Program Communication Skills House as.

Johanna Mikitka AE-390 October 13, 2004

Passive Heating and Cooling

1 ISAT Module III: Building Energy Efficiency Topic 6:Stead-State Building Loads z Fabric Loss z Ventilation Loss z Environmental Temperature z Steady-State.

The House as a System 1. Air Temperature and Water Vapor.

HVAC 7ab CNST 305 Environmental Systems 1 Dr. Berryman

Heat Loss HVAC CNST 305 Environmental Systems 1 Dr. Berryman.

Human factor. Five sence [ Natural factor ] Mouse Eye Noise Ear Skin _Mouse,Eye,Ear,Noise,Skin Active factor.

Heat Treatment Analysis using the Heat Treatment Calculator (H.T.C) Sham Kashyap Computing and Information Sciences Kansas State University.

“HEAR IT AND FORGET IT, SEE IT AND REMEMBER IT, DO IT AND UNDERSTAND IT” R12310: ME and ChemE Lab and Demo Hardware Development DPM – Spring 2012.

Wittaya Julklang, Boris Golman School of Chemical Engineering Suranaree University of Technology STUDY OF HEAT AND MASS TRANSFER DURING FALLING RATE PERIOD.

HVAC523 Heat Gain. Heat First law of thermal dynamics states that HEAT TRAVELS FROM HOT TO COLD. 95 degree outside air will flow through the building.

Lecture 5: Building Envelope Description (Part I)

Passive House Seminar for Professionals from the Building Sector

School of Civil Engineering Integrating Heat Transfer Devices Into Wind Tower Systems to provide Thermal Comfort in Residential Buildings John Kaiser S.

Conservation and Environmental Design and Construction

Visualizing How Buildings Breathe Presented By: Ahmed Mohamed Gendia By: Adrian Tuluca, R.A Web Address:

CALRES Update Phase 1 Progress Report April 22, 2009 Bruce Wilcox Phil Niles Ken Nittler.

ET 493 Senior Design Spring 2013 By: Justin Cifreo, Benjamin Gabriel, Nathan Taylor Instructor: Dr. Cris Koutsougeras Advisor: Dr. Junkun Ma Mechanical.

Passive Design in the Pacific Environment Passive Design in the Pacific Environment PASSIVE DESIGN FOR THERMAL COMFORT IN A TROPICAL ENVIRONMENT Neil Purdie.

The Renson Headquarters Renovation issue Renovation issue Major findings Major findings The RENSON- The RENSON- Headquarters More information... More information...

Energy Conservation February 8, Steve Wilson, MBA, CEM, CDSM, BEP The Energy Guy.

HVACR416 - Design Heat Loss / Heat Gain Part 1. Why? The primary function of Air Conditioning is to maintain conditions that are… o Conductive to human.

0 Load Calculation Manual Output : 1. Screen Outputs (Results, Pareto Chart, Hourly Estimation) 2. Optional Outputs (*CLTD.txt, *TETD.txt) 3.

ENT 255 HEAT TRANSFER. Course synopsis : The objective of this course is to introduce the concepts and applications of heat transfer modes to the students.

A New Language Shining the Light on Passive Solar Features and Retrofit Possibilities.

Development of a new Building Energy Model in TEB Bruno Bueno Supervisor: Grégoire Pigeon.

Turbulence Models Validation in a Ventilated Room by a Wall Jet Guangyu Cao Laboratory of Heating, Ventilating and Air-Conditioning,

Managed by UT-Battelle for the Department of Energy 1 United States Grid Security and Reliability Control in High Load Conditions Presented to Associate.

Announcement: The Course Test is Net week ! On Wednesday, October 12 It starts at 1 pm sharp.

Heat transfer Steady state conditions not for dynamic systems in buildings through walls, roofs, floors, windows, doors building structures and U-values.

Building Environmental Systems

Truss Heel Heights and Energy Code Requirements

The Indoor Air Quality in a Multi-garage

Air Cooling Design for Machine Components

Fire Study in Multiple Compartments

RESIDENTIAL HVAC (HEAT LOSS & GAIN)

Heating, Ventilating, and Air Conditioning

Heating Ventilating and Air Conditioning

Lecture Objectives: Discuss exam questions

Environmental Thermal Engineering

Heat gain and heat loss in buildings

Heat Loss and Gain Heat Transfer Winter Heat Loss Summer Heat Gain

Prof. Chris Hendrickson

Conduction Cooling Loads

Experimental Investigation of

Heating, Ventilating, and Air-Conditioning

Did you know? In the U.S. alone, buildings account for: 72% of electricity consumption

Introduction – Who am I? Environmental Project Manager – Trident Technical College Mechanical Engineer Licensed Builder South Carolina Accredited Commercial.

Peter Armstrong Pacific Northwest National Laboratory

Zero Energy Homes Goal: Regulate Heat Transfer

Heat Loss and Gain Heat Loss and Gain

Zoning Load Calculations

Lecture Objectives: Review linearization of nonlinear equation for unsteady state problems Learn about whole building modeling equations.

Heat Loss and Gain Heat Loss and Gain

Make up: Project presentation class at the end of the semester

Lecture Objectives: Discuss HW3

Mahnameh TAHERI, Ardeshir MAHDAVI

PROJECT NAME: HVAC AND MECHANICAL SYSTEMS DESIGN

Heat Loss and Gain Heat Loss and Gain

Objectives Processes in Cooling towers and AHUs.

Jerzy KWIATKOWSKI, Jerzy SOWA, Andrzej WISZNIEWSKI

Presentation transcript:

Brandon Schulte Senior, Mechanical Engineering Experimental Validation of Transient State Heat Transfer in Residential Attic Space Brandon Schulte Senior, Mechanical Engineering

Background 25% of household energy lost through HVAC equipment in attic space Current modeling software (TRNSYS, DOE, Energy Plus, etc.) is used in industrial applications and does not account for attic spaces. Dr. Ahmed Megri of the Civil Engineering Department developed 2 models to model residential attic space. Research performed to collect data on attic space to provide comparison for theoretical model.

Model Dr. Megri’s model uses multi-zone and zonal methods Intermediate approach between single zone and CFD Two Models Temperature distribution in attic Interaction between attic space and HVAC system. Thermal resistance and capacitance networks.

Model RC-Network for attic space in transient state (Soleimani and Megri, 2008) Model accounting for HVAC System, Megri (2001)

Temperature Measurements Temperature measurements taken using Nickel-Nickel Chromium thermocouple Voltage created between two dissimilar metals, linear relationship to temperature Voltage is very small, susceptible to disturbances (table bumping, etc.) Thermocouples connected to SCXI-1300 which is housed in SCXI-1000 power chassis and interfaced with PC. LabView program ran on continuous loop, recorded temperature every 5 minutes.

Thermocouple Placement Thermocouples placed according to model. Locations included attic, walls, mid-room stand, HVAC duct, and outside. Mid-room stand included heights of 0.3 m, 1 m, 1.8m. At each height, globe temperature and exposed thermocouple. Globe temperature includes effects of radiation. Megri (2001)

Room Description 1 East Wall, 1.0 m 2 S Wall, 1.0 m 3 N Wall, 1.0 m 18 Ceiling 26 Diffuser Air Stand 4 0.3 m Air 5 1 m Air 6 1 m Globe 7 0.3 m Globe 8 1.8 m Air 31 1.8 m Globe Attic 13 Attic Floor 14 Attic Roof, Surface 15 Attic Ceiling, Corresponding to 14 16 Mid Level, NW Ceiling 17 Duct Surface 19 Mid Level, SE Ceiling 20 Outside Air 24 Attic Air

Wind Measurements Wind measured in intervals of 2-4 hours Wind measurements provide data on local environmental conditions Wind data compared to Laramie Airport wind measurements. Local wind generally same direction, less speed. Other Measurements Attic dimensions Angle of attic ceiling to attic floor. Ventilation (mechanical, natural, or none?)

Time Wind Speed (m/s) Direction Wind Speed (mph) 1/5/2010 6:00:00 PM 4 SSW 15 6.73 SW 8:00:00PM W 17 7.62 10:20:00 PM 3.01 12 5.38 12:00:00 PM 0.75 18 8.07 1/6/2009 9:00:00 AM 1.05 NW 5 2.24 11:00:00 AM 3 2:00:00 PM 3.82 10 4.48 NNW 5:00:00 PM 0.53 11 4.93 8:00:00 PM 0.1 N 2 0.90 9:00:00 PM 0.68 2.5 1.12 1/7/2009 0.52 E 0.48 0.5 0.22 NE 12:50:00 PM 0.2 0.00 S 2:45:00 PM 0.45 0.39 6:20:00 PM 0.21 SE 8:30:00 PM 0.34 10:00:00 PM 1.35 1/8/2009 10:00:00 AM 12:30:00 PM 0.4 1:30:00 PM 3:45:00 PM 0.42 0.25 0.11 5:30:00 PM 0.62 6:30:00 PM 7:30:00 PM 1.32 0.24 1.13 1/13/2010 8:00:00 AM 9:30:00 AM 1.8 0.12 4:00:00 PM 0.38 0.82 0.94 1/14/2010 8:30:00 AM 1.5 10:30:00 AM 0.18 0.15 4:30:00 PM 0.46 0.31 10:30:00 PM 0.08 1/15/2010 1.31 0.04 5:15:00 PM 0.06

Conclusions Successfully modified LabView program . Temperature and wind measurements taken over a week. Sources of error Dryer exhaust into attic Occupied space (door opening, windows, oven, etc.) Unexpected spikes in data due to sensitive thermocouples. Data still under analysis Improvements Unoccupied household. Stable module placement.

Questions? References Andrews, J., Field Comparison of Design and Diagnostic Pathways of Duct Efficiency Evaluation. Proceedings of the 1996 ACEEE Summer Study on Energy Efficiency in Buildings, Washington D.C.; American Council for an Energy Efficient Economy. Greer, J., J. Fillo. Control of thermal runaway-some mathematical insights. International Journal of Heat and Mass Transfer, 1998, 41:2979-90 Megri , A.C., Soleimani, As., (2008) Computer-Based Analysis of Transient State Heat Transfer in Residential Attic Space, Roomvent 2009.