Process and installation for cooling air-conditioning water by heat exchange with cryogenic liquids
View Patent ↗The invention relates to a process for cooling air-conditioning water used to air-condition a hospital building, comprising the steps of: (a) providing nitrogen in liquid form (LIN); (b) providing oxygen in liquid form (LOX); (c) providing air-conditioning water to be cooled; and (d) performing a heat exchange ( 4 ) between the air-conditioning water to be cooled and the nitrogen in liquid form (LIN) and/or the oxygen so as to cool the air-conditioning water and to vaporize the nitrogen and/or the oxygen and obtain nitrogen in gaseous form (GAN) and/or oxygen in gaseous form (GOX).
1. A cooling facility ( 1 ) for cooling the air-conditioning water for air-conditioning at least one portion of a hospital building, comprising:
a first water pipe ( 2 ) for air-conditioning water to be cooled,
a nitrogen pipe ( 11 ) connected to a liquid nitrogen source ( 10 ) supplying nitrogen in liquid form (LIN),
an oxygen pipe ( 21 ) connected to a liquid oxygen source ( 20 ) supplying oxygen in liquid form (LOX),
heat exchanger ( 3 ) configured and adapted to perform a heat exchange ( 4 ) between the air-conditioning water to be cooled, provided by the first water pipe ( 2 ), and the liquid oxygen and/or the liquid nitrogen provided by said nitrogen pipe ( 11 ) and oxygen pipe ( 21 ), so as to cool the air-conditioning water and to vaporize the liquid oxygen and/or the liquid nitrogen and to thereby obtain nitrogen and/or oxygen in gaseous form,
an atmospheric nitrogen vaporizer ( 19 ) and an atmospheric oxygen vaporizer ( 29 ) which are fluidically connected so as to be capable of being supplied, respectively, by the LIN source ( 10 ) and the oxygen source ( 20 ).
2. The cooling facility according to claim 1 , characterized in that the liquid nitrogen source ( 10 ) is a liquid nitrogen storage tank and the liquid oxygen source ( 20 ) is a liquid oxygen storage tank.
3. The cooling facility according to claim 2 , characterized in that the cooling facility further comprises a second cooled water pipe ( 42 ) fluidically connected to the heat exchanger ( 3 ) and to an air-conditioning system ( 5 ) for a second hospital building.
4. The cooling facility according to claim 2 , characterized in that the cooling facility further comprises a hospital building with an air-conditioning network ( 45 ) and the air-conditioning system ( 5 ) is connected so as to supply the air-conditioning network ( 45 ) of the hospital building with cooled water originating from the heat exchanger ( 3 ).
5. The cooling facility according to claim 1 , characterized in that the atmospheric nitrogen vaporizer ( 19 ) is designed to vaporize the LIN and to produce gaseous nitrogen and the atmospheric oxygen vaporizer ( 29 ) is designed to vaporize the LOX and to produce gaseous oxygen.
6. The cooling facility according to claim 1 , characterized in that a gaseous nitrogen supply line ( 16 ) and a gaseous oxygen supply line ( 26 ) fluidically connect the atmospheric nitrogen vaporizer ( 19 ) and the atmospheric oxygen vaporizer ( 29 ) to a gas mixer ( 6 ).
7. The cooling facility according to claim 1 , characterized in that the cooling facility also comprises a hospital building, and a bypass line ( 27 ) fluidically connects the atmospheric oxygen vaporizer ( 29 ) to an oxygen pipe network ( 28 ) of the hospital building.