摘要:
The present invention relates to fluoroolefin compositions. The fluoroolefin compositions of the present invention are useful as refrigerants or heat transfer fluids and in processes for producing cooling or heat. Additionally, the fluoroolefin compositions of the present invention may be used to replace currently used refrigerant or heat transfer fluid compositions that have higher global warming potential.
摘要:
The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises a fluoroolefin and at least one other component. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and fire suppression and fire extinguishing agents.
摘要:
The present invention relates to a process for making single or multiple planar array five layer membrane electrode assemblies utilizing array assemblies, as well as the array assemblies themselves, comprising proton exchange membrane (PEM), catalyst coated membranes (CCM) and gas diffusion layers (GDL), as well as gas diffusion electrodes (GDE) for use in fuel cells, wherein the process is practical, efficient and scalable.
摘要:
Multipurpose sealing adhesive materials for sealing different components of an electrochemical cell are provided. The sealing materials are acid, acid anhydride, acid ester or metallocene modified polyolefins that are capable of providing multiple sealing functionalities in a heat activated sealing process. These sealing polymers are capable of adhering to plain and textured metal, graphite and graphite-filled polymer composite separator plates.
摘要:
Disclosed is a unitized electrochemical cell sub-assembly having a first separator plate and a second separator plate that each has a first surface. A recess is located in at least one of the first surfaces to define a chamber adjacent the periphery of the plates when the plates face each other. A membrane electrode assembly (MEA) comprising an ion exchange membrane and a pair of gas diffusion layers is disposed on and between each of the first surfaces between the two plates when the plates face each other so that the peripheral edge of the ion exchange membrane is located within the chamber. Also located in the chamber is a non-conductive sealant polymer that seals and joins the first and second plates to each other, and that seals and joins the first and second plates to the edge of the ion exchange membrane. Also disclosed is a fabrication method for making the unitized electrochemical cell sub-assembly.
摘要:
Disclosed are compositions containing about 17.0 weight percent to about 22.0 weight percent pentafluoroethane; about 77.0 weight percent to about 81.0 weight percent 1,1,1,2-tetrafluoroethane; and about 1.0 weight percent to about 2.0 weight percent of n-butane, and which may include optional other components.
摘要:
Disclosed are compositions comprising iodotrifluoromethane and other compounds that are useful as heat transfer fluids, including refrigerants, in a stationary air conditioning or refrigeration system, a flooded evaporator chiller or a direct expansion chiller. Also disclosed are methods for producing cooling and methods for replacing R22, R407C, R410A, R404A or R507A in such equipment.
摘要:
Disclosed are compositions comprising HFC-1225ye and other compounds that are useful as heat transfer fluids, including refrigerants, in a flooded evaporator chiller, a direct expansion chiller or a closed loop heat transfer system, such as a mobile air conditioning system. The compositions are also useful as cleaning solvents, aerosol propellants, foam blowing agents, fire extinguishing or suppression agents and sterilants. Also disclosed are methods for producing cooling and methods for replacing HFC-134a in a flooded evaporator chiller, a direct expansion chiller or a closed loop heat transfer system using such compositions.
摘要:
The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises a fluoroolefin and at least one other component. The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and fire suppression and fire extinguishing agents.