A heat removal assembly for use with a power converter, said heat removal assembly comprising: a condenser; and an evaporator coupled in flow communication with said condenser, said evaporator configured to channel working fluid therebetween, said evaporator comprising: a supply housing including a first flow opening; a receiving housing including a second flow opening, wherein said supply housing and said receiving housing are orientated such that said first flow opening and said second flow opening are oppositely facing relative to each other; and at least one expansion housing extending between said supply housing and said receiving housing, wherein said at least one expansion housing comprises a flow inlet defined at said supply housing through which said working fluid is supplied from the supply housing to said expansion housing and a flow outlet defined at said receiving housing through which said working fluid is discharged from said expansion housing to said receiving housing, said flow inlet sized smaller in cross-sectional size than said flow outlet; wherein said evaporator is configured to channel said working fluid from said condenser into said supply housing through said first flow opening and to discharge said working fluid towards said condenser through said second flow opening; wherein said at least one expansion housing comprises an interior that progressively increases in size from said flow inlet towards said flow outlet; characterized in that said at least one expansion housing is configured to thermally couple to a heat load such that heat transferred from the heat load at least partially vaporizes the working fluid channeled through said at least one expansion housing. a condenser; and an evaporator coupled in flow communication with said condenser, said evaporator configured to channel working fluid therebetween, said evaporator comprising: a supply housing including a first flow opening; a receiving housing including a second flow opening, wherein said supply housing and said receiving housing are orientated such that said first flow opening and said second flow opening are oppositely facing relative to each other; and at least one expansion housing extending between said supply housing and said receiving housing, wherein said at least one expansion housing comprises a flow inlet defined at said supply housing through which said working fluid is supplied from the supply housing to said expansion housing and a flow outlet defined at said receiving housing through which said working fluid is discharged from said expansion housing to said receiving housing, said flow inlet sized smaller in cross-sectional size than said flow outlet; wherein said evaporator is configured to channel said working fluid from said condenser into said supply housing through said first flow opening and to discharge said working fluid towards said condenser through said second flow opening; wherein said at least one expansion housing comprises an interior that progressively increases in size from said flow inlet towards said flow outlet; characterized in that said at least one expansion housing is configured to thermally couple to a heat load such that heat transferred from the heat load at least partially vaporizes the working fluid channeled through said at least one expansion housing. a supply housing including a first flow opening; a receiving housing including a second flow opening, wherein said supply housing and said receiving housing are orientated such that said first flow opening and said second flow opening are oppositely facing relative to each other; and at least one expansion housing extending between said supply housing and said receiving housing, wherein said at least one expansion housing comprises a flow inlet defined at said supply housing through which said working fluid is supplied from the supply housing to said expansion housing and a flow outlet defined at said receiving housing through which said working fluid is discharged from said expansion housing to said receiving housing, said flow inlet sized smaller in cross-sectional size than said flow outlet; wherein said evaporator is configured to channel said working fluid from said condenser into said supply housing through said first flow opening and to discharge said working fluid towards said condenser through said second flow opening; wherein said at least one expansion housing comprises an interior that progressively increases in size from said flow inlet towards said flow outlet; characterized in that said at least one expansion housing is configured to thermally couple to a heat load such that heat transferred from the heat load at least partially vaporizes the working fluid channeled through said at least one expansion housing.