Brochure - Unical Lattner Condensing Hot Water Boilers

CASKADincreases output and efficiencyEfficiency (%)109108106104ALKON EFFICIENCYThe ALKON offers flexibleoperation and highoperating efficienciesWe have seen that the individualALKON boiler has an approved efficiencywhich, when the output reduces, increasesprogressively from 102 to 109% (incondensing mode).10210 15 20 25 30 35 40 45 5055 60 65 70Output (kW)This is possible because to the heatexchanger increases its efficiency, andflue temperature decreases, when theinput is reduced.Output sharing with 4 x 50kW modules in cascadeRequested output 200 kW50 kW 50 kW 50 kW 50 kWRequested output100 kW25 kW 25 kW 25 kW 25 kWIn order to increase the total operatingefficiency of the ALKON CASKAD,the E8 heating controller maintainsthe major number of ALKON unitsin the multiple boiler installation, firing atthe lowest possible rate (as shown in thebesides examples).Using this method the heating systemwill always operate at the maximumpossible efficiency, independentlyfrom the rate supplied.Total efficiencyη = 102Total efficiencyη = 106Always with the same operation principle,when the heating load slowly reduceitself, the output of each module will alsobe controlled and proportionally reduced.Requested output40 kW10 kW 10 kW 10 kW 10 kWRequested output30 kW10 kW 10 kW 10 kW OFFAs the minimum rate of each moduleis 10 kW, if the required load is inferiorto the total minimum output of the singleunits (n° units x 10 kW), only the ALKONboilers, needed to reach the requestedoutput at the maximum efficiency level,will be fired and the other units will beshut down.Total efficiencyη = 109Total efficiencyη = 109Moreover, in order to ensure an equaldaily rotation of each module, every24 hours each unit will be fired alternately,so as to ensure that each one operatesfor the same number of hours.