Water Fired Chiller/Chiller-Heater - Yazaki Energy

1 WE ARE FRIENDLY TO THE EARTHW ater Fired chiller / chiller -HeaterWFC-S Series: 10, 20 and 30 RT Cooling2 Yazaki Water Fired SINGLE-EFFECT chillers or chiller - heaters have cooling capacitiesof 10, 20 and 30 tons of refrigeration and produce chilled Water for cooling or hot waterfor heating in comfort air conditioning applications. The absorption cycle is energizedby a heat medium (hot Water ) at 158oF to 203oF from an industrial process, cogenerationsystem, solar Energy or other heat source and the condenser is Water cooled through acooling Yazaki absorption chiller or chiller -heater uses a solution of lithium bromide andwater, under a vacuum, as the working fluid. Water is the refrigerant and lithium bromide, a nontoxic salt, is the absorbent. refrigerant , liberated by heat from the solution, produces a refrigerating effect in the evaporator when cooling Water is circulated through the condenser and the heat medium inlet temperature exceeds , the solution pump forcesdilute lithium bromide solution into the generator.

2 The solution boils vigorously undera vacuum and droplets of concentrated solution are carried with refrigerant vapor to the primary separator. After separation, refrigerant vapor flows to the condenser and concentrated solution is precooled in the heat exchanger before flowing to the the condenser, refrigerant vapor is condensed on the surface of the cooling coil and latent heat, removed by the cooling Water , is rejected to a cooling liquid accumulates in the condenser and then passes through an orifice intothe FiredSINGLE-EFFECTC hiller orChiller-HeaterAbsorption PrincipleCooling CycleCONDENSERGENERATORHeat MediumABSORBERORIFICECOOLING/HEATINGCHAN GE-OVERVALVEC hilled WaterSOLUTIONPUMPEVAPORATORHEAT EXCHANGERD ilute SolutionConcentrated SolutionRefrigerant VaporRefrigerant LiquidCooling WaterChilled WaterHeat MediumCooling Water3 EvaporatorIn the evaporator.

3 The refrigerant liquid is exposed to a substantially deeper vacuum thanin the condenser due to the influence of the absorber. As refrigerant liquid flows overthe surface of the evaporator coil it boils and removes heat, equivalent to the latent heatof the refrigerant , from the chilled Water circuit. The recirculating chilled Water iscooled to and the refrigerant vapor is attracted to the deep vacuum in the absorber is maintained by the affinity of the concentrated solution from the generator with the refrigerant vapor formed in the evaporator. Therefrigerant vapor is absorbed by the concentrated lithium bromide solution flowing acrossthe surface of the absorber coil. Heat of condensation and dilution are removed by thecooling Water and rejected to a cooling tower. The resulting dilute solution is preheatedin a heat exchanger before returning to the generator where the cycle is the heat medium inlet temperature exceeds , the solution pump forcesdilute lithium bromide solution into the generator.

4 The solution boils vigorously undera vacuum to generate refrigerant vapor and droplets of concentrated solution. Since thechangeover valve is open during heating operation, the mixture of refrigerant vapor andconcentrated solution flows directly into the evaporator. Some refrigerant vapor flowsthrough the condenser before reaching the refrigerant vapor condenses on the surface of the evaporator coil and heat, equivalent tothe latent heat of the refrigerant , is transferred to the hot Water circuit. The recirculating wateris heated to 131oF. refrigerant liquid mixes with concentrated lithium bromide solution andthe resulting dilute solution returns to the generator where the cycle is CycleCONDENSERGENERATORHeat MediumABSORBERORIFICECOOLING/HEATINGCHAN GE-OVERVALVEHot WaterSOLUTIONPUMPEVAPORATORHEAT EXCHANGERD ilute SolutionConcentrated SolutionRefrigerant VaporRefrigerant LiquidHot WaterHeat Medium4 Absorption cycle energized by hotwater at 158oF to 203oF fromprocess, cogeneration, solar or otherwaste heat sources.

5 Safe, odorless, non-toxic workingfluids of lithium bromide and wateroperate under a vacuum at all times. Supplied as a chiller only or a chiller -heater for applications that require separation of heating Water and heatmedium circuits due to glycol, operat-ing pressure, flow or piping limitations. Crystallization prevented in the generator by utilizing a solution pumpand gravity drain-back system. Single hermetic pump controls solution flow. Faster cold start-up time than similarchillers with flooded generators. Chilled Water and hot Water outlettemperatures controlled by a built-inmicroprocessor with outputs to control a 3-way valve and/or heatmedium pump (supplied by others). All chillers and chiller - heaters supplied with a standard weatherproofcabinet suitable for outdoor installation. Built-in shutdown controls for highheat medium temperature andabnormal cooling Water conditions.

6 Cooling capacities increased at 85oFcooling Water and when energizedby 203oF heat medium. Ideal for a two pipe hydronic systemin which chilled or hot Water is circulated to a central airhandlingunit or multiple fan-coil units. Cooling or heating operation onchiller- heaters can be selected froma remote or built-in switch. Only 30 minute delay required foroperation changeover. Transportation and lifting are simplified because of modular construction. Factory charged and performancetested. UL Listed for USA and (%) Water Outlet Temperature (oF)Capacity (%) sgnitteS lortnoC dradnatStnioP gnitaR dradnatSMinimum LimitMaximum Water Outlet Temperature (oF)Minimum LimitMaximum Limit5 Application ( Water Fired Cooling & Heating System - Cooling Operation)* Cooling/Heating Changeover Valvesupplied on chiller - heaters onlyCOOLING TOWERWATER Fired chiller -HEATERNOTES:1.

7 Specifications are based on Water in all circuits and fouling factor of ft2 Do not exceed psioperating pressure in anywater If heat medium inlet temperature exceeds 203oFthe chiller / chiller -heaterwill shutdown and requiremanual Cooling Water crossover piping with 3 in. type L c o p p e r c o n n e c t i o n ss u p p l i e d b y o t h e r s for WFC-SC20/SH20 andWFC-SC30 Sound pressure noise levelmeasured in a free field ata point 79 in. behind thechiller/ chiller -heater and59 in. above the ground.* Minimum cooling Water flowHeat Medium03HS03CS02HS02CS01HS01 CSCFW ledoMCoolingCapacity (Btu/hr x 1000) Water Temp. (otelnI ,teltuO )FHeatingCapacity (Btu/hr x 1000) Water Temp. (otelnI ,teltuO )FChilled/HotRated Water Flow (gpm) Press Drop (psi) Retention Volume (gal) Rejection (Btu/hr x 1000) Temperature (o)dradnatS( )FWater*Rated Water Flow (gpm) Press.

8 Drop (psi) Retention Volume (gal) (Btu/hr x 1000) Temperature (oF) (Standard)HeatTemperature Range 158 (min.) - 203 (max.)MediumRated Water Flow (gpm) Press. Drop (psi) Retention Volume (gal) 3 ,zH06 ,V802ylppuS rewoPConsumption (W)210260310ffO - nOlortnoC yticapaCNoise LevelSound Pressure dB(A)494946 Chilled/Hot Water (in)1-1/2 NPT2 NPT2 NPTP ipingCooling Water (in)2 NPT2 NPT2-1/2 NPTHeat Medium (in)1-1/2 NPT2 NPT2-1/2 NPTW eight002,3050,2001,1)bl( yrD579,3845,2923,1)bl( gnitarepODilute SolutionConcentrated SolutionRefrigerant VaporRefrigerant LiquidCooling WaterChilled WaterHeat MediumFAN COIL UNITS peci cations*6 Performance CharacteristicsWFC-SC10/SH10( CHILLED Water )Heat Medium Inlet Temperature (oF)Cooling Capacity FactorHeat Input FactorHeating Capacity FactorWFC-SC20/SH20( CHILLED Water )Heat Medium Inlet Temperature (oF)Cooling Capacity FactorHeat Input FactorHeating Capacity Factor158oF(MIN)

9 160 170 180 190 200 160 170 180 190 200 Water Inlet Water Inlet Water Outlet Temp. 131oFCooling Water Inlet Water Inlet Water Outlet Temp. 131oF80oF80oF80oF80oF203oF(MAX)158oF(MIN )203oF(MAX)7 WFC-SC30/SH30( CHILLED Water )Heat Medium Inlet Temperature (oF)Cooling Capacity FactorHeat Input FactorHeating Capacity FactorHM FLOW CORRECTION( CHILLED Water )Heat Medium Flow (%)Heat Medium Flow CorrectionNOTES:1. designates Standard Rating Capacity and Heat Input curves based on standard Water flow rates in all Heat Medium Flow Correction curve onlyapplicable for heat medium inlet temperaturesof 176oF to Heating Efficiency = 97%.5. Performance based on standard fouling factorof ft2hroF/Btu in all Performance data may be interpolated butmust not be Expanded performance curves are providedfor reference only.

10 Contact Yazaki Ener gySystems, Inc. to obtain certified performanceratings from the factory or to determine performance at other conditions outside thescope of this (MIN)30%(MIN) 20 40 60 80 100 160 170 180 190 200 21085oFCooling Water Inlet Water Inlet Water Outlet Temp. (MAX)8 ABSORPTION chiller HEAT BALANCE HEAT IN = HEAT OUTQg + Qe = QcWhere, Qg = Heat input to generatorQe = Cooling capacityQc = Heat rejected to cooling towerCOOLING CAPACITYQe = CLG. FLOWxSTD. INPUT (COOLING)Qg = HEAT INPUTxHM FLOWxSTD. HEATFACTORCORRECTIONINPUTHEATING CAPACITYQh = HTG. FLOWxSTD. , Qh = Heating CapacityHEAT INPUT (HEATING)Qg = HEATING CAPACITY= DIFFERENCE (oF)T=ADJUSTED CAPACITY OR HEAT INPUT (MBH) x FLOW (gpm)PRESS. DROP FOR NONSTANDARD FLOW (psi)P = STANDARDxNONSTANDARD FLOW2 PRESS. DROPSTANDARD FLOWEXAMPLE 1. Given design conditions:Heat medium inlet temperature.