Adsorption　chiller　technology　is　one　of　effective　means　to　convert　waste　thermal　energy　into　effective　cooling,　which　substantially　improves　energy　efficiency　and　lowers　environmental　pollution.　This　article　develops　an　improved　lump-parameter　design　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.　We　found　that　the　performance　predictions　from　this　model　compare　favourably　with　experimental　results.　At　rated　conditions　and　over　a　wide　range　of　cycle　times,　both　the　cooling　capacity　and　COP　can　be　predicted　to　within　10%.　This　indicates　that　the　model　can　be　used　confidently　as　a　design　tool　for　multi-bed　adsorption　chillers.