1. A cooling system for electrical equipment, comprising:
a first cooling circuit including a primary cooling device;
a heat exchange member in thermal communication with the electrical equipment and coupled to the first cooling circuit; and
a second cooling circuit coupled to the heat exchange member, the second cooling circuit including a secondary cooling device that cools fluid flowing through the second cooling circuit,
wherein the first cooling circuit includes two supply lines and two return lines in a reverse-return configuration.
2. The cooling system according to claim 1, wherein the secondary cooling device cools a portion of a heat load associated with the electrical equipment that the primary cooling device cannot cool.
3. The cooling system according to claim 1, wherein the secondary cooling device cools a portion of a heat load associated with the electrical equipment as a function of atmospheric conditions.
4. The cooling system according to claim 1, further comprising primary cooling coils in thermal communication with the electrical equipment.
5. The cooling system according to claim 1, wherein the secondary cooling device operates to cool the electrical equipment when a wet bulb temperature of the atmosphere associated with the environment of the electrical equipment exceeds a predetermined wet bulb temperature.
6. The cooling system according to claim 1, wherein the fluid flowing through the first cooling circuit is a glycol solution or water and wherein the fluid flowing through the second cooling circuit is a refrigerant.
7. The cooling system according to claim 1, further comprising:
a second heat exchange member in thermal communication with the electrical equipment and coupled to the first cooling circuit; and
a third cooling circuit coupled to the second heat exchange member, the third cooling circuit including a second secondary cooling device that cools fluid flowing through the third cooling circuit.
8. The cooling system according to claim 7, further comprising secondary cooling coils in thermal communication with the electrical equipment.
9. The cooling system according to claim 1, wherein the primary cooling device is a free-cooling device.
10. The cooling system according to claim 9, wherein the free-cooling device includes a fluid cooler.
11. A cooling system for electrical equipment, comprising:
a first cooling circuit including a primary cooling device;
a heat exchange member in thermal communication with the electrical equipment and coupled to the first cooling circuit;
a second cooling circuit coupled to the heat exchange member, the second cooling circuit including a secondary cooling device that cools fluid flowing through the second cooling circuit; and
a third cooling circuit coupled to the second cooling circuit, the third cooling circuit including a cooling fluid source and an expansion tank.
12. The cooling system according to claim 1, wherein the heat exchange member is a condenser.
13. The cooling system according to claim 10, wherein the fluid cooler is a cooling tower.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A system for marking a location for treatment within a gastrointestinal tract comprising:
a capsule sized to pass through an intestinal tract of a patient;
an acoustic transmitter coupled to the capsule, the acoustic transmitter configured to transmit an acoustic tracking signal between the capsule and a location external to a patient’s body, to track a three dimensional location of the capsule within the patient’s body as the capsule is passing through the intestinal tract;
a reference signal generator coupled to the capsule, the reference signal generator configured to generate and transmit a reference signal for identifying a time of tracking signal origination; and
an actuation mechanism comprising a controller configured to actuate a pump within the capsule for marking of the three dimensional location as the capsule is passing through the intestinal tract at a desired treatment location in the intestinal tract based on the capsule location.
2. The capsule of claim 1 wherein the capsule further comprises a container containing a material for marking the location, and wherein the actuation mechanism comprises a release configured to release the material.
3. The system of claim 2 wherein the material is selected from a group comprising a dye, a radiopaque marker, a radioactive material, and a fluorescing compound.
4. The system of claim 1 wherein the capsule further comprises an immobilization mechanism configured to immobilize the capsule at the location, and wherein the actuating mechanism is configured to actuate the immobilizing mechanism to immobilize the capsule at the location.
5. The system of claim 4 wherein the immobilizing mechanism comprises a wall engaging member.
6. The system of claim 5 wherein the wall engaging member comprises an expandable member.
7. The system of claim 5 wherein the wall engaging member comprises an anchor.
8. The system of claim 1 wherein the capsule further comprises an identification mechanism actuable by the actuating mechanism.
9. The system of claim 8 wherein the identification mechanism is selected from a group comprising: a dye, a radiopaque marker, a radioactive material, a fluorescing compound, and a detectable energy emitter.
10. The system of claim 1 wherein the capsule further comprises a telemetry circuit configured to receive a telemetry signal to instruct the actuating mechanism to operate to mark the location.
11. The system of claim 1 further comprising a plurality of acoustic transducers configured to receive the tracking signal.
12. The system of claim 11 wherein the plurality of acoustic transducers are arranged in a cartesian coordinate system.
13. The system of claim 11 wherein the plurality of acoustic transducers are configured to receive and transmit signals between each other.
14. The system of claim 1 further comprising: a sensor coupled to the capsule, configured to sense a parameter corresponding to the location to be marked for treatment.
15. The system of claim 14 wherein the parameter sensed by the sensor comprises a location parameter corresponding to the location of the capsule.
16. The system of claim 14 wherein the sensor is configured to sense a characteristic of the intestinal tract adjacent the location of the capsule.
17. The system of claim 1 wherein the reference signal travels faster in the patient’s body then the tracking signal so as to determine the time of tracking signal origination.
18. The system of claim 1 wherein a reference signal transit time of the reference signal traveling through the patient’s body is negligible in comparison to a tracking signal transit time of the tracking signal traveling through the patient’ body.