As one kind of environmentally friendly refrigeration, the adsorption refrigeration has attracted many
attentions in resent decades. This paper introduces the researches of adsorption refrigeration systems
with the commonly used working pairs, advanced adsorption cycles, heat and mass transfer
enhancement and attempts of adsorption refrigeration applications. Poor heat and mass transfer
problem is a bottleneck to prevent the improvements of the adsorption refrigeration technique. Two
ways to enhance the heat and mass transfer are discussed in this paper. The adsorption deterioration of
adsorbent, another obstacle to physical adsorption refrigeration applications, is also pointed out. And the
possible reasons and the possible methods are analyzed.