Adsorption　chiller　technology　is　one　of　effective　means　to　convert　waste　thermal　energy　into　cooling,　which　substantially　improves　energy　efficiency　and　lowers　environmental　pollution.　This　article　develops　an　improved　lumped-parameter　model　for　multi-bed　silica　gel-water　adsorption　chillers.　It　is　validated　by　experimental　results　stemming　from　a　four-bed　silica　gel-water　adsorption　chiller　at　various　operating　conditions.　It　is　found　that　the　performance　predictions　from　this　model　compare　favourably　with　experimental　results.　At　all　tested　conditions　and　over　a　wide　range　of　cycle　times,　the　cooling　capacity　and　COP　can　be　predicted　to　within　10%　and　12%,　respectively.　(C)　2014　Elsevier　Ltd　and　IIR.　All　rights　reserved.