Electric heater system

An electric heater system comprising:

• an inlet;
• an outlet;
• a plurality of heat exchanger assemblies connected in series, each heat exchanger assembly comprising a vessel, heating elements disposed within the vessel, and at least one fluid guide member;
• a plurality of electrical components configured to operate the heating elements of the plurality of heat exchanger assemblies;
• and
• one or more connectors securing the vessels of the plurality of heat exchanger assemblies to each other, the one or more connectors also in fluid communication with the vessels;
• wherein fluid entering the inlet flows through the heat exchanger assemblies and through the one or more connectors and exits through the outlet, the fluid guide members of the heat exchanger assemblies being of different combinations to generate a predetermined pressure drop between the inlet and the outlet, and
• wherein a first heat exchanger assembly of the plurality of heat exchanger assemblies includes a first fluid guide member and an adjacent second heat exchanger assembly of the plurality of heat exchanger assemblies includes a second fluid guide member, the first and second fluid guide members are of different types.

An electric heater system comprising:

• an inlet;
• an outlet;
• a plurality of heat exchanger assemblies connected in series, each heat exchanger assembly comprising a vessel, heating elements disposed within the vessel, and at least one fluid guide member;
• one or more connectors securing the vessels of the plurality of heat exchanger assemblies to each other, the one or more connectors also in fluid communication with the vessels;
• and
• an insulating shroud surrounding the plurality of heat exchanger assemblies and the connectors;
• wherein fluid entering the inlet flows through the heat exchanger assemblies and through the one or more connectors and exits through the outlet, the fluid guide members of the heat exchanger assemblies being of different combinations to generate a predetermined pressure drop between the inlet and the outlet,
• wherein a first heat exchanger assembly of the plurality of heat exchanger assemblies includes a first fluid guide member and an adjacent second heat exchanger assembly of the plurality of heat exchanger assemblies includes a second fluid guide member, the first and second fluid guide members are of different types, and
• wherein each heat exchanger assembly includes an electrical component configured to operate the heating elements, and wherein at least two of the electrical components have different operating voltages.