Flameless heating system

A mobile heating system comprising:

• a. an enclosure supported by a mobile chassis, the enclosure defining an air plenum having an air inlet and an air outlet;
• b. a fan disposed in the air plenum, the fan being configured to move an air flow stream from the air inlet to the air outlet of the enclosure;
• c. an internal combustion engine disposed in the air plenum, the internal combustion engine having an output shaft;
• and
• d. a hydraulic circuit including:
• i. a hydraulic pump operably coupled to the output shaft of the internal combustion engine;
• ii. a first heat exchanger located in the enclosure air plenum and in fluid communication with the hydraulic pump, the first heat exchanger being configured to transfer heat from fluid in the hydraulic circuit to the air flow stream;
• iii. a second heat exchanger located in the enclosure air plenum, the second heat exchanger being configured to transfer heat from an engine exhaust air stream to the heating air flow stream;
• iv. a third heat exchanger located in the enclosure air plenum, the third heat exchanger being configured to transfer heat from an internal combustion engine coolant to the heating air flow stream;
• v. a hydraulic motor operably coupled to the fan, the hydraulic motor being in fluid communication with and driven by the hydraulic pump;
• vi. a first valve disposed between the hydraulic pump and the heat exchanger, the first valve being configured to resist fluid flow and to increase a fluid pumping pressure of the hydraulic pump;
• and
• vii. a second valve upstream of the first valve, the second valve being configured to selectively direct hydraulic fluid between the first valve and the hydraulic motor.

A mobile heating system comprising:

• a. an enclosure supported by a mobile chassis, the enclosure defining an air plenum having an air inlet and an air outlet;
• b. a fan disposed in the air plenum, the fan being configured to move an air flow stream from the air inlet to the air outlet of the enclosure;
• c. an internal combustion engine disposed in the air plenum, the internal combustion engine having an output shaft;
• and
• d. a hydraulic circuit including:
• i. a hydraulic pump operably coupled to the output shaft of the internal combustion engine;
• ii. a first heat exchanger located in the enclosure air plenum and in fluid communication with the hydraulic pump, the first heat exchanger being configured to transfer heat from fluid in the hydraulic circuit to the air flow stream;
• iii. a second heat exchanger located in the enclosure air plenum, the second heat exchanger being configured to transfer heat from an engine exhaust air stream to the heating air flow stream;
• iv. a third heat exchanger located in the enclosure air plenum, the third heat exchanger being configured to transfer heat from an internal combustion engine coolant to the heating air flow stream;
• v. a hydraulic motor operably coupled to the fan, the hydraulic motor being in fluid communication with and driven by the hydraulic pump;
• vi. a first valve disposed between the hydraulic pump and the heat exchanger, the first valve being configured to resist fluid flow and to increase a fluid pumping pressure of the hydraulic pump;
• vii. a second valve upstream of the first valve, the second valve being configured to selectively direct hydraulic fluid between the first valve and the hydraulic motor;
• viii. a third valve upstream of the second valve, the third valve being configured to bypass hydraulic fluid around the first and second valves to the first heat exchanger;
• and
• ix. a fourth valve in parallel with the first valve, the fourth valve being configured to bypass hydraulic fluid around the first valve to the first heat exchanger.

A flameless mobile heating system comprising:

• a. an enclosure supported by a mobile chassis having at least a pair of wheels and a hitch such that the mobile heating system can be towed by a vehicle, the enclosure defining an air flow path having an air inlet and an air outlet;
• b. a first heat source located within the enclosure air flow path and between the air inlet and the air outlet, the first heat source being an internal combustion engine;
• c. a second heat source located within the enclosure air flow path and between the air inlet and the first heat source, the second heat source being a radiator associated with the internal combustion engine;
• d. a third heat source located within the enclosure air flow path and between the air inlet and air outlet, the third heat source being configured to receive exhaust from the internal combustion engine;
• e. a fourth heat source located within the enclosure air flow path and between the first heat source and the air outlet, the fourth heat source being configured to deliver heat to the air flow path via oil heated by a hydraulic circuit powered by the internal combustion engine, the hydraulic circuit including a hydraulic pump, a hydraulic motor, and first and second valves, the first valve being configured to resist flow of the oil to increase a fluid pumping pressure of the hydraulic pump such that a temperature of the oil is increased, the second valve being upstream of the first valve, the second valve being configured to selectively direct hydraulic fluid between the first valve and the hydraulic motor;
• and
• f. a fan operably coupled to the hydraulic motor and configured to transport an air flow stream from the enclosure air flow path inlet, through the first, second, third, and fourth heat sources, and out of the enclosure air flow path outlet.