I have one question regarding total heat losses from water surface. Water is heated with immersion heater in open condition in a room. Heat losses from the top of the pan to air is to be calculated. And basically three mechanisms of heat transfer viz. by convection, evaporation and radiation is associated with it. (Conduction through walls negligible, insulated from sides). So my question is can I consider following combinations.​


1. Both convection and evaporation along with radiation.
2. only evaporation and radiation.
3. only convection and radiation.


And what will be the exact formula for evaporation heat loss if considered. **water is heated in room.