A fan assembly, and associated methods are shown. Fan assemblies and methods shown include nozzles within a housing of the fan. Fan assemblies and methods shown may provide water and/or fire suppression chemicals within a fan housing that provide characteristics such as increased thrust and motor cooling effects.

An apparatus and method powered by compressed fluid, which preferably provides both air conditioning and power generation. The apparatus includes a fluid conduit of substantially elongate form (51), a helical accelerator (80), a substantially elongate distributor body (53) associated with said accelerator (80), wherein at least part of said distributor body (53) is positioned substantially coplanar to said fluid conduit (51), and a TEG device (55), positioned intermediate said fluid conduit (51) and said distributor body (53). In use, a compressed fluid (70) is supplied to an inlet (60) of said helical accelerator (80). The accelerator (80) causes the fluid (70) to form a vortex inside said distributor body (53) and thereby produce a hot fluid stream (71) and a cold fluid stream (72). The hot fluid stream (71) is directed to flow adjacent to a wall of said distributor (53) to thereby heat said distributor wall. The cold fluid stream (72) is at least partly directed to flow via said accelerator (80) to cool said fluid conduit (51), and, to cool a surrounding environment. A temperature differential is thereby created between said distributor wall and said conduit (51), to generate power in the TEG device (55).

An apparatus and method powered by compressed fluid, which preferably provides both air conditioning and power generation. The apparatus includes a fluid conduit of substantially elongate form (51), a helical accelerator (80), a substantially elongate distributor body (53) associated with said accelerator (80), wherein at least part of said distributor body (53) is positioned substantially coplanar to said fluid conduit (51), and a TEG device (55), positioned intermediate said fluid conduit (51) and said distributor body (53). In use, a compressed fluid (70) is supplied to an inlet (60) of said helical accelerator (80). The accelerator (80) causes the fluid (70) to form a vortex inside said distributor body (53) and thereby produce a hot fluid stream (71) and a cold fluid stream (72). The hot fluid stream (71) is directed to flow adjacent to a wall of said distributor (53) to thereby heat said distributor wall. The cold fluid stream (72) is at least partly directed to flow via said accelerator (80) to cool said fluid conduit (51), and, to cool a surrounding environment. A temperature differential is thereby created between said distributor wall and said conduit (51), to generate power in the TEG device (55).

A multilevel deep well cooling and geothermal utilization system and process. The system has a deep well heat harnessing system, a shallow part heat-exchanging system, and a high-temperature water lifting system. The deep well heat harnessing system has a heat absorbing pipe, a thermally-conductive fluid lifting pipe, a thermally-conductive fluid lowering pipe, temperature sensors, and a water pump. The shallow part heat-exchanging system has a heat-dissipating pipe, a heat-storing water pool, a water intake pump, a water intake valve, a temperature sensor and a liquid level meter. The high-temperature water lifting system has a water discharging pump, a flowmeter, a water discharging valve, and a high-temperature water lifting pipe.

A multilevel deep well cooling and geothermal utilization system and process. The system has a deep well heat harnessing system, a shallow part heat-exchanging system, and a high-temperature water lifting system. The deep well heat harnessing system has a heat absorbing pipe, a thermally-conductive fluid lifting pipe, a thermally-conductive fluid lowering pipe, temperature sensors, and a water pump. The shallow part heat-exchanging system has a heat-dissipating pipe, a heat-storing water pool, a water intake pump, a water intake valve, a temperature sensor and a liquid level meter. The high-temperature water lifting system has a water discharging pump, a flowmeter, a water discharging valve, and a high-temperature water lifting pipe.

A ventilation system for an underground mine includes a blowing curtain, a passive regulator in a shape of an airfoil and an airflow ventilation source. The passive regulator is positioned in the air path adjacent a discharge end of the blowing curtain.

A method for cooling a refuge chamber (100) with an emergency cooler (10) in an emergency situation includes cooling of a refrigerating agent (22) in a cold accumulator (20) with a cooling device (30) and detecting an emergency situation. Cold being stored in the refrigerating agent (22) of the cold accumulator (20) is released into the refuge chamber (100)the refrigerating agent (22) of the cold accumulator (20) is exposed for heat transfer with the refuge chamber (100).

A method for cooling a refuge chamber (100) with an emergency cooler (10) in an emergency situation includes cooling of a refrigerating agent (22) in a cold accumulator (20) with a cooling device (30) and detecting an emergency situation. Cold being stored in the refrigerating agent (22) of the cold accumulator (20) is released into the refuge chamber (100)the refrigerating agent (22) of the cold accumulator (20) is exposed for heat transfer with the refuge chamber (100).

A mine cooling and dehumidifying system includes a compressor, a gas-liquid separator, an evaporator, a condenser and an expansion valve. The evaporator is in an air supply well, and the condenser is in a return air well; the compressor, the gas-liquid separator and the expansion valve are all between the air supply well and the return air well; an inlet of the compressor is connected to a refrigerant outlet of the evaporator through the gas-liquid separator, and a refrigerant inlet of the evaporator is connected with an outlet of the expansion valve; an inlet of the expansion valve is connected with a refrigerant outlet of the condenser, and a refrigerant inlet of the condenser is connected with an outlet of the compressor. In the present disclosure, by vapor compression type refrigeration cycle, the downhole air heat is transferred to the return air and then discharged to the ground.

A mine cooling and dehumidifying system includes a compressor, a gas-liquid separator, an evaporator, a condenser and an expansion valve. The evaporator is in an air supply well, and the condenser is in a return air well; the compressor, the gas-liquid separator and the expansion valve are all between the air supply well and the return air well; an inlet of the compressor is connected to a refrigerant outlet of the evaporator through the gas-liquid separator, and a refrigerant inlet of the evaporator is connected with an outlet of the expansion valve; an inlet of the expansion valve is connected with a refrigerant outlet of the condenser, and a refrigerant inlet of the condenser is connected with an outlet of the compressor. In the present disclosure, by vapor compression type refrigeration cycle, the downhole air heat is transferred to the return air and then discharged to the ground.