1. MECHANICAL ENGINEERING
DATTA MEGHE COLLEGE OF ENGINEERING,
AIROLI- NAVI MUMBAI.
1
Under the Guidance of,
Prof.R.R.Shekapure. (project guide teacher)
TITLE OF PROJECT: ANALYSIS ON EFFECT OF POLYAURETHANE
FOAM ON THERMAL CONDUCTIVITY OF MATERIAL.
1. Mr. Harshad Dnyaneshwar Dhanke
2. Miss. Sayali Dnyaneshwar Shelar
3.Miss. Pranjali Yashwant Pawar
4.Miss. Dipti Vikas Kokate
2. Problem Statement:
We all know that total world energy consumption is about 575 quadrillion BTU of energy according to
US energy usage, which is expected to grow to 5.6 billion by the year 2050.
Currently 1.6 billion air conditioning units are installed globally with 20% of household energy usage,
which is expected to grow to 5.6 billion by the year 2050.
In which 50% of energy losses in air conditioning are due to wall construction by heat transfer and
construction of the wall that is material used in the that particular construction.
These losses and problem may looks little but on an average it costs 50% energy losses widely.
So, there is need of innovative solution for this problem.so,here we came with a new
innovative solution.
3. Objective of the project:
-OBJECTIVES-
1)The main objective of project is to reduce the thermal conductivity of material by adding Polyurethane
Foam to the mixture. So that Heat transfer will get reduced and eventually Cost of air conditioning will be
less.
2) To analyze and examine Thermal Conductivity of material like Concrete by adding Polyurethane
Foam.
3) To analyze compressive strength of Material by adding the Polyurethane Foam to the mixture.
4) To achieve the maximum energy saving in the Air Conditioning setup which will reduce the monthly
expense on air conditioning.
5) Trying to do more study and analysis in this particular section.
4. Literature Review:
THEORY 1 THEORY 2 THEORY 3
THEORY 4 THEORY 5
Perre.Mounanga
experiment on
polyurethane foam.
U. Johnson
Alengaram study on
oil palm shell foam.
MR. Drifa
Belkharchouche
study on effect of
moisture.
Theory by Ashwin
Narendra Raut.
A.Benazzouk
theory for light
weight construction.
5. Polyurethane Foam:
-What is Polyurethane Foam-
• Polyurethane foam is currently one of the best thermal insulating materials available. As a result,
thermal insulation is a key feature of almost all its applications. The possibility of combining rigid
polyurethane foam with different facing materials to produce composites also gives it an important
role as a construction material.
• The principal areas of use for rigid polyurethane foam are:
1. Domestic appliance: Thermal insulation for domestic and commercial refrigerators and freezers, hot
water tanks.
2. The building industry: Insulating boards with flexible facings for roofs, walls, ceilings and floors.
3. Industrial thermal insulation: Insulation of tanks and containers, pipelines, cold stores
6. Polyurethane Foam:
Properties of Polyurethane Foam
Property Standard value
Gel time 200 Seconds
Density (free rise) 33kg/m3
Compressive strength 0.13N/mm2
Flexural strength 0.23N/mm2
Water Absorption Less than 3%
Thermal Conductivity 0.0180 W/mK
7. Methodology:
1) Literature Review and Problem statement -
In this section different research paper are referred and it was helpful to find out literature gap. Based on the
literature gap problem statement and objective of the project are set.
2) Preparation of Sample-
The different sample of the concrete will be prepared as per the standard norms by adding the PUF. The
PUF will be added at different weight % into the concrete. Then, sample will be cured for 7, 14 and 28 days.
8. 3) Measurement of the thermal conductivity of the samples-
The thermal conductivity of the test sample will be measure having different weight percentage of the PUF
under different curing period utilizing thermal conductivity measuring device.
4) Measurement of the compressive strength of the sample-
In order to study the structural rigidity of the sample, there compressive strength will be measured utilizing
the compression testing machine.
5) Results of testing-
Results obtain from thermal conductivity testing machine and compression testing machine are being
analyse and are compared with Ansys 15 software to check variation in experimental results also.
6) Preparation of Heat Balance Sheet for sqft Room-
This process involves preparation of heat balance sheet for air conditioning without use of polyurethane
foam and with use of polyurethane foam and both results are being compared and final conclusion will be
made. Which is energy saving in the AC which will save the cost of monthly expenses on air conditioning.
7) Conclusion: results of the test are analyzed.
12. • Thickness of concrete slab = 30mm
• Heater = 300 W Mica heater
• Dimmer stat = open type, 230V, 0.2A, single phase
• Enclosure size = 600 x 360 x 370 mm
Note down the ultimate load to calculate the compressive strength.
• Maximum loading capacity = 2000 KN
• Least count = 2kN
• Cross section area of cube = 150 mm x 150 mm
Specifications of concrete slab
13. 1) 0 % PUF
2) 0.1% PUF
3) 0.25%PUF
4) 0.5% PUF
1) 7 Days
2) 14 Days
3) 28 Days
14. Experimentation and Analysis:
Composite wall Apparatus Arrangement of thermocouple on concreate slab
• For thermal conductivity measurement Composite wall apparatus was used in this study.
• For that the arrangement of thermocouple on concrete slab is as shown in figure.
19. Thermal Conductivity Calculation:
• Total Heat transfer through two concrete slab Q = V x I Watt
Q = 70 x 0.516 Watt
Q = 36.12 Watt
• Total Heat transfer through one concrete slab Q/2 = 36.12/2
= 18.06
• Heat flux in any one direction = q =
Q/2
A
W/m2
q =
18.06
0.2x0.2
q = 451.15 W/m2
• Thermal Conductivity (K) is calculated by K =
q x L
(T1− T2)
W/mk
=
451.15x 0.03
(75.5− 62)
K = 1.003 W/mk
29. Conclusion:
• Reduction in thermal conductivity of concrete with addition of polyurethane foam due to insulating
effect of polyurethane foam. The addition of polyurethane foam by 0.5% in concrete was decreasing
thermal conductivity by 17.93% for 28 days of curing.
• Densities decrease from 2307 Kg/m3 to 2170 Kg/m3 with the addition of 0.5% polyurethane foam. A
decrease in density due to porosity and air pores formed inside concrete structures results in a
reduction in thermal conductivity.
• Compressive strength decreases by 40.39% due to 0.5% addition of polyurethane foam for 28 days of
curing also compressive strength increases with an increase in curing days.
• The addition of 0.25% polyurethane foam for 28 days of curing shows thermal conductivity and
compressive strength of 0.885 W/mk and 20.31N/mm2 respectively can be used as structural insulating
concrete.
