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US 9,541,487 B2Granted
Method of managing decontamination and decontamination management apparatus for use in the method
AssigneeTaikisha Ltd.
InventorsMasanobu Saito, Keisuke Kodera, Masatoyo Oshiro
Life of this patent
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Abstract
It is determined that indoor condensation of hydrogen peroxide vapor is to occur, if there is a solution with which both (Equation 1): PT·y1=P01·x1·γ1 and (Equation 2): PT·y2=P02·x2·γ2 hold. With this, it is possible to accurately determine whether indoor condensation of hydrogen peroxide vapor is to occur or not in decontamination.
Claims7
A decontamination management method, comprising:
- a) determining the hydrogen peroxide vapor pressure (PT·y1) and water vapor pressure (PT·y2) in a decontamination target room using the indoor temperature and humidity of the decontamination target room and a specified concentration of hydrogen peroxide;
- b) determining a saturated hydrogen peroxide vapor pressure (P01), if a hydrogen peroxide component existed alone at the indoor temperature of the decontamination target room;
- c) determining a saturated water vapor pressure (P02) if the water component existed alone at the indoor temperature of the decontamination target room;
- d) solving (Equation 1) and (Equation 2), using the vapor pressures, (PT·y1) and (PT·y2), and the saturated vapor pressures, (P01) and (P02), obtained in steps (a) through (c)
- PT·y1=P01·x1·γ1 (Equation 1),
- PT·y2=P02·x2·γ2 (Equation 2),
- wherein x1 is equal to a liquid phase mol fraction of hydrogen peroxide, x2 is equal to a liquid phase mol fraction of water, γ1 is equal to an activity coefficient for the hydrogen peroxide component, and γ2 is equal to an activity coefficient for the water component;
- e) sequentially varying values of the liquid phase mol factions for the hydrogen peroxide component (x1) and the water component (x2) from 0 to 1 under a condition specified by (Equation 3):
- x1+x2=1 (Equation 3),
- and thereby also sequentially varying the activity coefficients for the hydrogen peroxide component (γ1) and the water component (γ2);
- f) determining that condensation of hydrogen peroxide vapor occurs inside the decontamination target room if there exists a solution in which both (Equation 1) and (Equation 2) are true, or
- g) determining that condensation of hydrogen peroxide vapor does not occur inside the decontamination target room if there does not exist a solution with which both (Equation 1) and (Equation 2) are true.
9 more elements
A decontamination management method, comprising:
- a) determining the hydrogen peroxide vapor pressure (PT′·y1′) and water vapor pressure (PT′·y2′) in a decontaminating gas feed passage using the temperature and humidity of the gas feed passage and a specified concentration of hydrogen peroxide;
- b) determining a saturated hydrogen peroxide vapor pressure (P01′) if the hydrogen peroxide component existed alone at the temperature of the gas feed passage;
- c) determining a saturated water vapor pressure (P02′) if the water component alone existed alone at the temperature of the gas feed passage;
- d) solving (Equation 1′) and (Equation 2′), using the vapor pressures, (PT′·y1′) and (PT′·y2′), and the saturated vapor pressures, (P01′) and (P02′), obtained in steps (a) through (c)
- PT′·y1′=P01′·x1·γ1 (Equation 1′),
- PT′·y2′=P02′·x2·γ2 (Equation 2′),
- wherein x1 is equal to a liquid phase mol fraction of hydrogen peroxide, x2 is equal to a liquid phase mol fraction of water, γ1 is equal to a activity coefficient for the hydrogen peroxide component, and γ2 is equal to a activity coefficient for the water component;
- e) sequentially varying values of the liquid phase mol fractions for the hydrogen peroxide component (x1) and the water component (x2) from 0 to 1 under a condition specified by (Equation 3′):
- x1+x2=1 (Equation 3′),
- and thereby also sequentially varying the activity coefficients for the hydrogen peroxide component (γ1) and the water component (γ2);
- f) determining that condensation of hydrogen peroxide vapor occurs inside the decontaminating gas feed passage if there exists a solution in which both (Equation 1′) and (Equation 2′) are true, or
- g) determining that condensation of hydrogen peroxide vapor does not occur inside the decontaminating gas feed passage if there does not exist a solution with which both (Equation 1) and (Equation 2) are true.
9 more elements
A decontamination management method, wherein:
- a) determining the hydrogen peroxide vapor pressure (PT·y1) and water vapor pressure (PT·y2) in the decontamination target room using the humidity of the decontamination target room and a specified concentration of hydrogen peroxide;
- b) determining a saturated hydrogen peroxide vapor pressure (P01) if the hydrogen peroxide component existed alone at the surface temperature of an object in the decontamination target room;
- c) determining a saturated water vapor pressure (P02) if the water component existed alone at the surface temperature of said object;
- d) solving (Equation 1″) and (Equation 2″), using the vapor pressures, (PT″·y1″) and (PT″·y2″), and the saturated vapor pressures, (P01″) and (P02″), obtained in steps (a) through (c)
- PT″·y1″=P01″·x1·γ1 (Equation 1),
- PT″·y2″=P02″·x2·γ2 (Equation 2),
- wherein x1 is equal to a liquid phase mol fraction of hydrogen peroxide, x2 is equal to a liquid phase mol fraction of water, γ1 is equal to an activity coefficient for the hydrogen peroxide component, and γ2 is equal to an activity coefficient for the water component;
- e) sequentially varying values of the liquid phase mol fractions for the hydrogen peroxide component (x1) and the water component (x2) from 0 to 1 under a condition specified by (Equation 3″):
- x1+x2=1 (Equation 3″),
- and thereby also sequentially varying the activity coefficients for the hydrogen peroxide component (γ1) and the water component (γ2);
- f) determining that condensation of hydrogen peroxide vapor occurs on the surface of said object in the decontamination target room if there exists a solution in which both (Equation 1″) and (Equation 2″) are true, or
- g) determining that condensation of hydrogen peroxide vapor does not occur on the surface of said object in the decontamination target room if there does not exist a solution with which both (Equation 1) and (Equation 2) are true.
9 more elements
Dependencies are inferred from the claim text.