Cooling apparatus, systems, and methods
Apparatus and systems, as well as methods and articles, may operate to actively cool an electronic device using a first heat removing cooling element, and to induce a thermal gradient in a heat pipe by conducting heat from a hot side of the first heat removing cooling element to a cold side of a second heat removing cooling element using the heat pipe. The heat pipe may comprise a variable conductance heat pipe. The apparatus and system may operate in a downhole environment, including logging and drilling operations.
1. An apparatus, comprising:
a thermal component;
a first heat removing cooling element configured to receive operating power, to thermally couple to the thermal component, and disposed to receive heat from the thermal component when the operating power is received;
a heat pipe connected to and disposed directly adjacent to a hot side of the first heat removing cooling element and disposed to receive heat from the hot side of the first heat removing cooling element when the operating power is received;
a second heat removing cooling element having a cold side connected to and disposed directly adjacent to a hot side of the heat pipe, the second heat removing cooling element configured to receive operating power to actively induce a thermal gradient in the heat pipe and disposed to receive heat from the hot side of the heat pipe; and
a primary heat sink connected to and disposed directly adjacent to a hot side of the second heat removing cooling element and disposed to receive heat from the hot side of the second heat removing cooling element when the operating power is received.
2. The apparatus of claim 1 , wherein the second heat removing cooling element is selected from one of a thermoelectric cooling device, a thermionic cooling device, a thermal-acoustic cooling device, or a magnetic cooling device.
3. The apparatus of claim 1 , wherein the heat pipe comprises a substantially fixed conductance heat pipe having a thermal conductivity of greater than about 50 Btu/(h·ft 2 ·°F.·ft).
4. The apparatus of claim 1 , wherein the heat pipe comprises a vaporizable fluid.
5. The apparatus of claim 1 , further including:
a thermal collector disposed between the thermal component and a cold side of the first heat removing cooling element.
6. A system, comprising:
a thermal component;
a first heat removing cooling element configured to receive operating power, to thermally couple to the thermal component, and disposed to receive heat from the thermal component when the operating power is received;
a first heat pipe connected to and disposed directly adjacent to a hot side of the first heat removing cooling element and disposed to receive heat from the hot side of the first heat removing cooling element when the operating power is received;
a second heat removing cooling element having a cold side connected to and disposed directly adjacent to a hot side of the first heat pipe, the second heat removing cooling element configured to receive operating power to actively induce a thermal gradient in the first heat pipe and disposed to receive heat from the hot side of the first heat pipe; and
a pressure housing including a primary heat sink to connected to and disposed directly adjacent to a hot side of the second heat removing cooling element and disposed to receive heat from the hot side of the second heat removing cooling element when the operating power is received.
7. The system of claim 6 , wherein the pressure housing comprises a substantially evacuated insulating flask.
8. The system of claim 6 , wherein the first heat pipe comprises a variable conductance heat pipe.
9. The system of claim 6 , wherein the primary heat sink comprises an exterior wall of the pressure housing.
10. The system of claim 6 , wherein the primary heat sink comprises a second heat pipe.
11. The system of claim 7 , further comprising:
a collar to couple to a drill bit and to house the substantially evacuated insulating flask.
12. The system of claim 7 , further comprising:
a tool body to couple to a logging cable and to house the substantially evacuated insulating flask.
13. The system of claim 12 , wherein the logging cable includes one of a wireline, a mono-cable, or a slick-line.
14. The system of claim 7 , further including:
a stopper mechanically coupled to the substantially evacuated insulating flask, wherein the stopper includes a second heat pipe coupled to a hot side of the second heat removing cooling element.