A bladeless fluid/vapor includes: (a) three or more turbine discs disposed within a case, wherein each turbine disc has a center opening, a first set of holes substantially equally spaced from one another along a first radius, a second set of holes substantially equally spaced from one another along a second radius, and two or more of the turbine discs have a set of exhaust ports positioned annularly around the center opening; (b) the case includes a main housing, a cover and one or more fluid/vapor inlets oriented to direct a fluid/vapor onto an outer portion of the turbine discs; (c) a drive shaft passing through the center openings of the turbine discs and attached to the turbine discs; (d) a fluid/vapor outlet in the cover; and (e) a set of exhaust holes proximate to and connected to the fluid/vapor outlet that are positioned annularly around the drive shaft.