The OP says he will be in both high and low latitudes. In high latitudes a diesel pot burner stove will do great double duty as cooker and
cabin heater, but in lower latitudes it is unbearable so usually a 2-burner
Origo alcohol stove is used on top. Pot burners heat the entire stove (some bypass is possible on some models) so it inevitably radiates a lot of heat. Wallas is the only non-pot burner diesel stove that I know of. It shouldn't radiate as much heat as a pot burner but it will still radiate a fair amount of heat from the ceramic cooking surface - not really the best for tropical comfort. The good news is that it uses the same
fuel as the
engine; the bad news is that it is a complex design. All vented stoves have the potential for a backdraft putting out the flame, followed a few seconds later with explosive spontaneous re-ignition; it is very messy, a little scary, but mostly a non-event. A coaxial intake/exhaust system will eliminate it, as will a boost fan in the air intake.
For hot days it is best to put flame directly to the pot or pan, and not heat an entire cooktop. Kerosene, alcohol and propane all do this. I have cooked exclusively on kerosene for 25 years and find that it is convenient enough, and if the proper
fuel is used and the burners maintained smell is not an issue. Flareups are only a problem for noobs - once learned it is rare and mostly a non-event. I carry at least a year's supply of kerosene and alcohol for starting and have never had a supply issue (I don't wait until the tank is empty to start looking for fuel). Kerosene suits me but I recognize that it is not for everyone. I also note that many I have met who have tried and dislike it never actually mastered its use; I didn't until an
English couple helped me, and I have helped a few others to learn. I have never seen adequate instructions. BTW there is a nice-looking Taylors 30L stove that just came up on
Seattle Craigslist for $1k for anyone looking for a kerosene stove.
Other than the fuel being very expensive in many places, I think the
Origo stoves are a good solution. They are as simple and reliable as it gets.
These days propane is widely available, and potentially much safer than in the past. Unfortunately in much of the world pure propane is not as available, only as propane/butane mixes, which can cause problems with older stoves. Modern stoves with CE ratings can handle pure propane, pure butane, any mixture of the two, and at any pressure delivered by a propane or butane
regulator. This is a non-trivial statement. Older stoves have had their burners melt when butane is run with propane pressure regulators, and present a
safety risk. Mixes can be inexact, so if the propane is exhausted first it is nearly pure butane being used. With a set of pigtails fuel can be transferred from local
tanks, or local
tanks can be used instead, so there should be no technical barrier to getting fuel. However transporting tanks is often an issue as they are usually banned on public transport, and sometimes taxis won't take them either. There is usually a work-around, such as a local picking up some
money by doing a group propane run - just not always convenient. As for
safety, if the appropriate care is taken the risks are manageable; if not, it may still be highly unlikely that an
accident happens, but if it does it can be very, very bad. Don't be cavalier with propane.
Greg