Convective calorimeter apparatus and method
First Claim
1. A convective calorimeter for measuring heat loss from a subject comprising:
- adiabatic chamber means;
means providing circulatory air flow about the inner periphery of the adiabatic chamber means comprising baffle means shielding the subject;
means for measuring heat addition to said circulatory air flow;
means providing ventilating air flow to said adiabatic chamber means; and
means for measuring selected properties of said ventilating air flow, wherein said heat addition to said circulatory air flow represents sensible heat loss from the subject.
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Abstract
A direct convective air flow calorimeter characterized by fast response time, high efficiency, and transient, as well as steady state, heat measurement capability. The calorimeter generally measures sensible and insensible heat losses, and may measure indirect heat losses as well. The calorimeter can be scaled to accommodate animal as well as human subjects. The convective calorimeter includes an adiabatic chamber wherein circulatory air flow is provided about the inner periphery of the chamber while baffles are used to shield the subject from the circulatory air flow. The chamber is also provided with ventilating air flow. Finally, sensors are used for determining the heat addition to the circulatory air flow, which represents the sensible heat loss from the subject being tested, and for determining selected properties of the ventilating air flow.
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Citations
18 Claims
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1. A convective calorimeter for measuring heat loss from a subject comprising:
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adiabatic chamber means; means providing circulatory air flow about the inner periphery of the adiabatic chamber means comprising baffle means shielding the subject; means for measuring heat addition to said circulatory air flow; means providing ventilating air flow to said adiabatic chamber means; and means for measuring selected properties of said ventilating air flow, wherein said heat addition to said circulatory air flow represents sensible heat loss from the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of determining heat loss from a subject comprising the steps of:
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a) providing an adiabatic chamber; b) providing circulatory air flow about the inner periphery of the adiabatic chamber by providing baffle means shielding the subject; c) measuring heat addition to the circulatory air flow; d) providing ventilating air flow to the adiabatic chamber; and e) measuring selected properties of the ventilating air flow, wherein the step of measuring heat addition to the circulatory air flow represents sensible heat loss from the subject. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification