Transcript First Progress Report.ppt

Analysis of
Ground Coupled Heat Exchanger Efficiency
Brett Walsh
Master of Engineering In Mechanical Engineering
Rensselaer Polytechnic Institute at Hartford
Introduction/Background
• Improve the efficiency of heating,
ventilation and air conditioning (HVAC)
systems.
• A ground coupled heat exchanger can be
used in either a heating or cooling mode
by taking advantage of a “near constant”
ground temperature.
Problem Description
• Analyze the efficiency of a ground coupled heat
exchanger in an effort to optimize an already
efficient design.
• Analysis will be performed for a ground coupled
heat exchanger that utilizes the following
– Open and/or Closed loop
– Single or multiple passes
– Multiple fluids
Methodology/Approach
• Log Mean Temperature Difference (LMTD) method will
be used to optimize the various ground coupled heat
exchangers designs and analyze their efficiency.
• Use temperature variation from Groton, CT.
• Assume a constant ground temperature.
• Assume a near constant heat exchanger outlet
temperature.
• Determine the length of pipe.
Resources Required
• The resources required for the complete of this project
are including, but not limited to, the use of the following
textbooks:
–
–
–
–
Introduction to Thermodynamic and Fluids Engineering
Convective Heat and Mass Transfer
Fundamentals of Engineering Thermodynamics
Transport Phenomena
• Microsoft Office and COMSOL Multiphysics will be used
for analysis, post processing, and compilation.
Expected Outcome
• Ground Could heat exchanger with air will be
more efficient
• Ground Could heat exchanger with fluid will be
less efficient.
Milestones/Deadlines
Deadline
Milestone
9/30
Complete Project Proposal
9/30
Start COMSOL simuation
10/7
Complete Open Loop – Single Pass Calculation for Air
10/9
Complete Open Loop – Multiple Pass Calculation for Air
10/14
Complete Closed Loop – Single Pass Calculation for Air
10/16
Complete Closed Loop – Multiple Pass Calculation for Air
10/18
Analyze/Compare Calculations for Air
10/20
Post Process First Progress Report
10/21
Complete First Progress Report
10/26
Complete Open Loop – Single Pass Calculation for Second Fluid
10/28
Complete Open Loop – Multiple Pass Calculation for Second Fluid
11/2
Complete Closed Loop – Single Pass Calculation for Second Fluid
11/3
Complete Closed Loop – Multiple Pass Calculation for Second Fluid
11/4
Analyze/Compare Calculations for Second Fluid
11/11
Complete Second Progress Report
11/18
Complete COMSOL Simulation
11/26
Analyze/Compare COMSOL Simulation with Calculation Performed for the Two Other Fluids
12/2
Complete Final Draft
12/16
Complete Final Report