Boiling heat transfer enhancement with carbon nanotubes for refrigerants used in building air-conditioning

Pool Boiling Performance Comparison of Smooth and Sintered Copper Surfaces with and Without Carbon Nanotubes

“…Where the porous matrix often has a capillary radius on the order of 100 µm, CNT-based nanostructures can provide capillary radii on the order of a few hundred nm. Park and Jung studied the pool boiling of refrigerants [13] and deionized water [14] with and without the addition of 1% by volume CNTs to the fluids, using acid treatment to prevent CNT agglomeration. They found heat transfer enhancement due to the addition of CNTs to occur primarily at lower heat fluxes and reported that surface fouling did not occur.…”

Experimental investigation on enhancement of ammonia–water falling film generation by adding carbon black nanoparticles

“…However, there are few literatures on falling film generation process of ammonia-water with nanoparticles. Meanwhile, many studies reported that the nanoparticles in the boiling heat transfer showed enhanced [15][16][17] or worsened [18][19][20] results, but in the flow boiling heat transfer showed excellent characteristics in enhancing the generation process [21,22]. Hence, further experiments are needed to be conducted to demonstrate whether nanoparticles will enhance the generation process in AARS.…”

Experimental study of the sintered multi-walled carbon nanotube/copper microstructures for boiling heat transfer

“…Enhancement of boiling heat transfer is considered as an important way to improve the energy efficiency of refrigeration and air-conditioning systems and obtain economic benefits from these systems [1,2]. There are three material surface factors that could affect boiling heat transfer performance.…”