Dynamic heat flow meter for measuring thermal properties of insulation or the like, and corresponding method
View Patent ↗A dynamic heat flow meter is provided which introduces a measured air flow into the system adjacent the test sample (e.g., insulation product), for which thermal properties are to be measured. The heat flow meter then measures thermal properties (e.g., thermal conductivity and/or heat capacity) of the test sample taking into account air flow through and/or adjacent the test sample.
1. A dynamic heat flow meter for measuring thermal properties of insulation, the dynamic heat flow meter comprising:
a housing defining at least one cavity therein;
first and second plates at least partially provided in the housing, wherein a test sample of insulation is to be provided between the first and second plates;
means for providing the first and second plates at known, but different, temperatures when the test sample is therebetween;
means for introducing an air flow into the cavity on one side of the test sample, and permitting air from the air flow to exit the cavity from the other side of the test sample;
means for measuring thermal properties of the test sample using each of the air flow and temperatures of the respective first and second plates; and
wherein the first plate has an air flow inlet aperture(s) defined therein, and the second plate has an air flow outlet aperture(s) defined therein.
2. The heat flow meter of claim 1 , wherein the test sample includes at least fiberglass insulation.
3. A dynamic heat flow meter for measuring thermal properties of insulation, the dynamic heat flow meter comprising:
a housing defining at least one cavity therein;
first and second plates at least partially provided in the housing, wherein a test sample of insulation is to be provided between the first and second plates;
means for providing the first and second plates at known, but different, temperatures when the test sample is therebetween;
means for introducing an air flow into the cavity on one side of the test sample, and permitting air from the air flow to exit the cavity from the other side of the test sample;
means for measuring thermal properties of the test sample using each of the air flow and temperatures of the respective first and second plates; and
wherein the housing has an air flow inlet aperture(s) defined therein on a first side of the test sample, and the housing further has an air flow outlet aperture(s) defined therein on a second side of the test sample that is opposite the first side.
4. The heat flow meter of claim 3 , wherein the test sample includes at least fiberglass insulation.
5. A dynamic heat flow meter for measuring thermal properties of insulation, the dynamic heat flow meter comprising:
a housing defining at least one cavity therein;
first and second plates at least partially provided in the housing, wherein a test sample of insulation is to be provided between the first and second plates;
means for providing the first and second plates at known, but different, temperatures when the test sample is therebetween;
means for introducing an air flow into the cavity on one side of the test sample, and permitting air from the air flow to exit the cavity from the other side of the test sample;
means for measuring thermal properties of the test sample using each of the air flow and temperatures of the respective first and second plates; and
means for measuring the volume of air flow both entering and exiting the cavity of the meter.
6. The heat flow meter of claim 5 , wherein the first plate has an air flow inlet aperture(s) defined therein, and the second plate has an air flow outlet aperture(s) defined therein.
7. The heat flow meter of claim 5 , wherein the test sample includes at least fiberglass insulation.
8. A dynamic heat flow meter for measuring thermal properties of insulation, the dynamic heat flow meter comprising:
a housing defining at least one cavity therein;
first and second plates at least partially provided in the housing, wherein a test sample of insulation is to be provided between the first and second plates;
means for maintaining the first and second plates at different temperatures when the test sample is therebetween;
an inlet for introducing a measured and/or known volume of air flow into the cavity on one side of the test sample;
at least one circuit for measuring thermal properties of the test sample taking into account each of the air flow and temperatures of the respective first and second plates; and
wherein the housing has an air flow inlet aperture(s) defined therein on a first side of the test sample, and the housing further has an air flow outlet aperture(s) defined therein on a second side of the test sample that is opposite the first side.
9. A method of measuring thermal properties of insulation, the method comprising:
in a housing, providing first and second plates;
positioning a test sample of insulation between the first and second plates;
providing the first and second plates at different temperatures when the test sample is therebetween;
introducing an air flow into the cavity on one side of the test sample, and permitting air from the air flow to exit the cavity from the other side of the test sample;
measuring thermal properties of the test sample using each of the air flow and temperatures of the respective first and second plates; and
wherein the first plate has an air flow inlet aperture(s) defined therein, and the second plate has an air flow outlet aperture(s) defined therein.
10. The method of claim 9 , wherein the test sample includes each of fiberglass insulation and foam insulation.
11. The method of claim 9 , wherein the test sample includes at least fiberglass insulation.
12. A method of measuring thermal properties of insulation, the method comprising:
in a housing, providing first and second plates;
positioning a test sample of insulation between the first and second plates;
providing the first and second plates at different temperatures when the test sample is therebetween;
introducing an air flow into the cavity on one side of the test sample, and permitting air from the air flow to exit the cavity from the other side of the test sample;
measuring thermal properties of the test sample using each of the air flow and temperatures of the respective first and second plates; and
wherein the housing has an air flow inlet aperture(s) defined therein on a first side of the test sample, and the housing further has an air flow outlet aperture(s) defined therein on a second side of the test sample that is opposite the first side.
13. The method of claim 12 , wherein the test sample includes at least fiberglass insulation.
14. A method of measuring thermal properties of insulation, the method comprising:
in a housing, providing first and second plates;
positioning a test sample of insulation between the first and second plates;
providing the first and second plates at different temperatures when the test sample is therebetween;
introducing an air flow into the cavity on one side of the test sample, and permitting air from the air flow to exit the cavity from the other side of the test sample;
measuring thermal properties of the test sample using each of the air flow and temperatures of the respective first and second plates; and
measuring the volume of air flow both entering and exiting the cavity of the meter.
15. The method of claim 14 , wherein the first plate has an air flow inlet aperture(s) defined therein, and the second plate has an air flow outlet aperture(s) defined therein.
16. The method of claim 14 , wherein the test sample includes at least fiberglass insulation.