The influence of 2-methyl-1-pentanol (2MP) on the cooling effect of pilot absorption chiller has been studied
experimentally. In one experimental series the additive was injected into LiBr solution. The enhancement ratio up to
20% was observed at the optimum additive concentration. In the second experimental series the additive was injected
into the refrigerant. The enhancement ratio became 32% at higher additive concentration. Different additive concentrations
have been tested in both series. These experimental results clearly showed that the presence of the additive
in the vapour phase, even in very small amounts, favours the enhancement more than the additive in the LiBr solution.
Also, it has been noticed, that the additive travels around the absorption cycle during long-term operation