2x parallel 230V 18" 1KW ceramic wirewound bar fire elements, with 6 equally spaced narrow stainless Jubilee clips on each wired alternately to either end of the element to convert each to 7 paralleled sections of approx 1/7 the resistance would also be in the ball-park for a 36V 46A load. Use heat resistant, or even bare wires, bolted to a hole drilled in the tail of each clip and alternate the tail directions so the paralleling wires can be on opposite sides of the element. The connections are chunkier and the elements less fragile so its probably easier than trying to hook up 33 50W halogens without the proper sockets. Build it on a shiny metal sheet and you only need high temperature insulation for the element support brackets - through bolt ordinary steel L brackets with over-size holes, on mica sheet with mica washers (+ a steel washer on top) under the bolt heads and pack between the bolt and the oversize hole with natural fiber string (which may carbonise) or glassfibre string to keep the bolt centered. You've still got that pesky 1.67KW of heat output, but at least its dry radiant heat, not steam so if you can point it out of an open window, you can run your load all day.
Adjust one bar at a time with the other out of circuit so you are running somewhere near 50% load. If the load is too high, disconnect one end terminal and if still too high, move the last clip towards the disconnected end. If its too low close up the Jubilee clip spacing towards one end till the hot resistance is slightly too low (measure it by powering 4 sections and measure the current into the center pair), then move the last clip back towards the other end to fine trim it.
Thank you, you've made me think of heating element for iron.
Here locally, the replacement part for iron are abundant and cheap, most are rated about 300 Watt at 220 Volt, and usually priced just about $ 0.5 per piece. Fyi, here mains is 220 Volt.
They look very similar to this, and comes with different variety of connection terminals.
(random photo taken from Google search)
Of course they will be submerged into the water or flowing water, I've been thinking to use a big bucket and just put the water hose in it and let the water run during the test period.
Now, more questions :
1. Can I use these in 5 or maybe 6 of in parallel ?
2. Safety concern, as I'm going to do this in a wet environment, lets say I've secured and isolated "ALL" mains 220 Volt wiring at this power brick, "AND" with earth connection at the brick is also properly done. Also the unit is relatively far from the water tank. Is it safe to expose the 36 Volt DC ? With the possibilities that my body may get connected accidentally with it, either directly or thru the water.
3. Do these type of iron heater element has similarity to incandescent bulb at the cold and hot resistance as Mr.Al mentioned ?
Also just fyi, this is the specification of the converter :