KR940005781A - Refrigerants used in thermal energy storage systems - Google Patents

Abstract

The present invention provides a refrigerant for use in a thermal energy storage system, consisting of water, a guest molecule, and a surfactant having a low micelle critical concentration in an amount up to two times its critical micelle concentration. The surfactant used in the present invention preferably has a critical micelle concentration of about 1 × 10 ³ M or less, more preferably a critical micelle concentration of 1 × 10 ⁻⁴ M to 1 × 10 ⁻⁶ M. The invention also discloses a thermal energy storage unit using the refrigerant and a process using the thermal energy storage unit.

Description

Refrigerants used in thermal energy storage systems

Since this is an open matter, no full text was included.

1 is a surfactant It is a graph showing the relationship between the surfactant concentration and the surface tension of water. 2 is a graph showing the relationship between surfactant concentration and interfacial tension with respect to 1, 2-dichloro-1-fluoroethane / water solution.

Claims (15)

A crystallite portion comprising cladrate forming refrigerant. In a thermal energy storage system having means for circulating a refrigerant through a heat exchanger and a means for lowering the temperature in the crystallite portion, a mixture of surfactants in an amount of up to two times the critical micelle concentration of water, guest molecules, and surfactant is employed. A system used as a drate forming refrigerant. The thermal energy storage system according to claim 1, wherein the surfactant is used in an amount of less than or equal to the critical micelle concentration of the surfactant. The thermal energy storage system of claim 1, wherein the critical micelle concentration is 1 × 10 ⁻⁶ M to 1 × 10 ⁻⁶ M. ³ . The thermal energy storage system of claim 1, wherein the guest molecule is selected from the group consisting of hydrochlorofluorocarbons and hydrofluorocarbons. The method of claim 4, wherein the guest molecule is 1. 1-dichloro-1-fluoroethane. 1-fluoro-1. 1-dichloroethane, chlorodifluoroethane, 1, 1, 1,2-tetrafluoroethane, 1, 1, 1-trifluoroethane, difluoromethane, pentafluoroethane and 1,1-di Thermal energy storage system, selected from the group consisting of fluoroethane. The thermal energy storage system of claim 1, wherein the surfactant is an alkyl dimethyl benzyl ammonium salt of octaphenyl phosphoric acid. 7. The thermal energy storage system according to claim 6, wherein the amount of the surfactant used is 200 ppm or less. A thermal energy storage process in which a refrigerant is induced to form a cladrate and heat is removed from the environment to melt the cladrate. Water guest molecules and. A process using as a refrigerant a mixture comprising a surfactant having a critical micelle concentration of 1 × 10 ⁻³ M or less in an amount of 2 times or less the critical micelle concentration. The process of claim 8, wherein the surfactant has a critical micelle concentration of 1 × 10 ⁻⁴ M to 1 × 10 ⁻⁶ M. 10. 10. The process of claim 9, wherein the surfactant is an alkyl dimethyl benzyl ammonium salt of octaphenyl phosphoric acid. The process according to claim 8, wherein the amount of the surfactant used is 200 ppm or less. water. A refrigerant for use in a thermal energy storage system, comprising a guest molecule and a surfactant having a low critical micelle concentration in an amount of up to two times its critical micelle concentration. The refrigerant of claim 12, wherein the critical micelle concentration is 1 × 10 ⁻³ M or less. The refrigerant of claim 13, wherein the critical micelle concentration is 1 × 10 ⁴ M to 1 × 10 ⁻⁶ M 15. The refrigerant of claim 14 wherein the surfactant is an alkyl dimethyl benzyl ammonium salt of octaphenyl phosphoric acid. ※ Note: The disclosure is based on the initial application.