Yazaki Gas Fired Chiller Sales Manual 1

Transcript

DOUBLE EFFECT ABSORPTION CHILLER /HEATER MG MODEL 1 Specifications CH-MG150CE CH-MG200CE Version 9.10 Contents Page 1. General Information 1.1 Chiller-heater 1.1.1 Chiller-heater Specification 1.1.2 External Dimensions 1.1.3 Sound Pressure level 1.1.4 Noise Criteria 1.1.5 Horizontal Characteristics 1.2 Burner 1.2.1 Burner Specifications . 1.2.2 External Dimensions ...................................... …………………………. ………………………….. …………………………… ………………………….. …………………………… 2 2 3 6 6 7 ......................…............. ………………………….. 8 9 2. Principle & Operating Cycle 2.1 Cycle Diagram 2.1.1 Cooling Cycle 2.1.2 Heating Cycle 2.2 Component Location 2.2.1 Schematic 2.2.2 Detail View 2.3 Component Description 2.4 Cooling and Heating Cycle 2.4.1 Cooling Cycle 2.4.2 Heating Cycle 2.5 MG Series Part Temperature Data 2.6 Equilibrium Chart ………………………….. …………………………... ………………………….. …………………………. …………………………. …………………………. …………………………. …………………………. …………………………. …………………………. …………………………. ………………………… -1- 10 10 10 11 12 13 17 24 24 25 26 27 1. General Information 1.1 Chiller-heater 1.1.1Chiller-heater Specifications MODEL ITEM Cooling Heating Chilled Water Temperature Capacity Chilled/Hot Water Cooling Water Fuel Electrical Control Combustion Dimension Piping Weight Inlet Outlet Inlet Hot Water Temperature Outlet Evaporator Pressure Loss(Max) Max Operating Pressure Rated Water Flow Water Retention Volume Heat Rejection Cooling Inlet Water Temperature Outlet Abs.&Cond.Pressurel loss(Max) Max Operating Pressure Rated Water Flow Water Retention Volume Type of Fuel Cooling Consumption Heating Power Source Capacity *1 Cooling Heating Burner Flame Detector Ignition Width *2 Depth Height *3 Chilled/Hot Water Cooling Water Gas Supply Dry Weight Operating weight kW kW ℃ ℃ ℃ ℃ kPa kPa ｌ/s ｌ kW ℃ CH－MG150 CH－MG200 527 429 703 572 12.0 7.0 56.0 60.0 72.3 25.2 180 892 kW kW kVA mm mm mm mm mm mm kg kg 33.6 260 1,190 29.5 34.6 ℃ kPa kPa ｌ/s ｌ 63.7 785.0 51.8 49.6 785.0 41.6 430 55.4 580 Natural Gas 440 586 517 689 400V 50Hz 3ph.+ Neutral 3.10 3.40 35%－100% Proportional Control 30%－100% Proportional Control Forced Draft (Proportion Controlled) Flame Rod Intermittent Spark 1,862(1951) 1,962(2046) 3,663 3,735 2,251(2,774) 2,491(3,011) 100A 125A 125A 150A 40A 50A 5,600 6,500 6,210 7,340 Constructed from prepainted hot- dip zincaluminum alloy-coated steel． Cabinet Notes） *1 Power consumption of Chiller/Heater only. (Excluding Chilled /Hot water pump and Cooling water pump.) *2 Dimensions in ( ) includes junction box. *3 Dimensions in ( ) includes vent cap. *4 Specifications are subject to change without prior notice. For further information , contact your Yazaki authorized service agent or distributor. -2- 1.1.2 External Dimensions  CH-MG150 -3- ● CH-MG200 -4-  Vent Cap -5- 1.1.3 Sound Pressure Levels  Measuring point Note) Rating operation sound is measured in a place where influence of reflection sound is little.  Sound pressure level characteristics Model CH-MG150 CH-MG200 Operation sound db (A) 74 74 50/60Hz Commonness 1.1.4 Noise Criteria  CH-MG150 -6-  CH-MG200 1.1.5 Horizontal Characteristics Set the machinery’s horizontal to following level. ・ Front and back horizontal:±2/1000 ・ Side and side horizontal: ±2/1000 -7- 1.2 Burner 1.2.1 Burner Specifications 1 2 3 4 5 6 Chiller-Heater Type Gas Type Gas Input （kW） Combustion control Ignition method Air control Gas control 7 Safety device 8 9 10 11 12 Flame detection Piping size Gas supply pressure Usage temperature Usage humidity 13 CE certificate CH-MG150 CH-MG200 Natural gas 517 689 Proportional (100%-30%） Intermittent spark Servor motor（Burner accessory） Servor motor（Burner accessory） Safety device such as Burner controller, Wind pressure switch, Gas pressure switch would be included in the burner as accessory. Flame rod 11/2inch 2inch 1.96kPa -20℃～60℃ 90%（RH） Burner including the accessories are CE certificated. -8- 1.2.2 External Dimension CH-MG150 RS45/M BLU CH-MG200 RS68/M BLU -9- 2 Principle & Operating Cycle 2.1 Cycle Diagram 2.1.1 Cooling Cycle 2.1.2 Heating Cycle - 10 - 2.2 Component Location 2.2.1 Schematic 22 21 28 31 　8 29 13 10 30 　2 14 　1 25 　9 　7 15 24 20 32 　5 26 12 18 27 　4 17 　6 11 23 19 8 　7 16 　3 No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description High Temp. Generator(HGE) Heat Exchanger(HE) Field Wiring Junction Box(JB) Transformer Box(TR) Control Box(CB) Gas Burner(GB) Changeover Valve(CVR) Solution Pump(SP) Refrigerant Proportional Valve(RPV) Refrigerant Freeze Protection Valve(SV1) Concentrated Solution Proportional Valve(CPV) Exhaust Chamber Fusible Plug Generator Level Switch(GLS) Palladium Cell(Pd) Gas Supply - 11 - No 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Description Chilled/Hot water Inlet Chilled/Hot water Outlet Cooling Water Inlet Cooling Water Outlet Condenser Temp. Sensor(CON) Evaporator Temp. Sensor(LT) Cooling Water Inlet Temp. Sensor(CTI) Cooling Water Outlet Temp. Sensor(CTO) Generator Temp. Sensor(GP) Generator Prevent Switch(GPS) Chilled/Hot Water Inlet Temp. Sensor(WTI) Chilled/Hot Water Flow Switch(FS1) Frames Insulation of HGE & LGE(Glass Wool) Insulation of EVA. (Polyethylene Form) Chilled/Hot Water Outlet Temp. Sensor(WTO) 2.2.2 Detail View Left side view of low temperature part LT Thermistor Cooling Water Outlet CON Thermistor CON SV1 EVA RPV LHE HHE SP Refrigerant Sampling Valve Solution Sampling Valve Cooling Water Intlet CVR1 Right side view of low temperature part Service Valve A Service Valve B Palladium Cell Fusible Plug Non-Condensable Gas RHE LGE Level Bar ABS SP Low temp. concentrated Gas Separator Solution LHE inlet Concentrated Solution ABS inlet - 12 - Front side view Service valve A and B CON LGE Control Box HGE SV1 EVA ABS Level bar Burner CPV Back side view Palladium cell LGE CVR2 Non-condensable gas storage tank(GST) CON Cooling watar outlet Flow switch HGE ABS EVA Chilled/hot water outlet Chilled/hot water inlet Cooling watar inlet CVR1 - 13 - HGE front side view Generator Level Switch Dilute Solution HGE Inlet High temp. Concentrated Soluton HGE Outlet HGE Smoke Chamber HGE side view - 14 - Front side view of Water Camber EVA tube ABS tube EVA partition rubber packing ABS partition rubber packing EVA partition rubber packing ABS perimeter rubber packing The water chambers are separated by partitions. Since a short circuit of the cooling water and the chilling water causes capacity reduction, the partitions of the water chambers include rubber packing. The perimeter packing works to avoid water leakage and any trouble with flooding and wasting water. Pay attention to rubber degradation and mounting of packing. Inside the water chambers are painted with tar epoxy for prevention of rust. This is different from the black paint used on the other parts of the machine Back side view of Water Camber ABS water chamber - 15 - EVA water chamber cover EVA cover partition Front side view of CON water chamber and lid Back side view of CON water chamber and lid - 16 - 2.3 Component Description - 17 - No. 1 2 Component HGE (High temp generator) Burner Description Combustion of fuel boils lithium bromide solution in the HGE to commence separation of refrigerant from the absorbent Device for combusting fuel (gas). For leading the exhaust gas to the chimney. 3 Smoke Chamber The Heat transfer pipe can be cleaned by removing the lid. 4 Chimney 5 Separator Baffle 6 Refrigerant vapor entry 7 LGE (low temp generator) 8 LGE separator 9 Fusible plug 10 Condenser 11 12 13 For the safe direction of products of combustion for discharge to atmosphere. For separating dilute LiBr solution from the refrigerant vapor. To transfer refrigerant vapor into the LGE heat exchange tube. To enable secondary boiling of the dilute LiBr solution to liberate additional refrigerant. Secondary separator to remove concentrated LiBr solution from the lifting secondary refrigerant vapor. A safety device to ensure the hermetic section of the absorption system cannot be over pressurized. Heat exchange tube cooled by an external cooling tower for condensing the secondary refrigerant vapor. Refrigerant liquid For accumulating refrigerant liquid storage resulting from storage vessel the function of RPV. Refrigerant Proportional Control Valve (RPV) Refrigerant service valve Electromagnetic proportional valve for control the LiBr solution concentration and improvement of the stability of chilled water temperature. Valve used to draw refrigerant samples when necessary. For leading refrigerant to evaporator which doesn’t empty into refrigerant liquid storage vessel. If the RPV is closed, 14 Refrigerant bypass pipe the excess refrigerant held in the refrigerant liquid storage vessel will be allowed to overflow to the evaporator. - 18 - No. Component 15 Liquid refrigerant sump 16 Tray and dripper 17 Evaporator High temperature 18 concentrated solution overflow pipe 19 High temperature heat exchanger (HHE) Description Contains and conveys cooled liquid refrigerant into the evaporator distribution trays. Distribute the liquid refrigerant evenly over the evaporator. Provides heat transfer from the internally flowing chilled water to the externally flowing liquid refrigerant. Directs the high temperature concentrated LiBr solution from the HGE to the HHE. Facilitates heat exchange between the concentrated LiBr solution flowing to the LHE and the diluted LiBr solution flowing from the LHE to the HGE. For discharging exhaust gas outdoor. It‘s structure is 20 Vent cap invasion prevention of rain water and no influence of wind pressure. For accumulating solution in bottom of evaporator that is 21 Weir of heating solution unnecessary during heating mode. There is a hole in the sump lowest part of the weir and solution doesn’t accumulate during cooling mode. 22 23 24 Concentrated solution return Transfers concentrated LiBr solution from the LGE to the pipe. LHE. Low temperature heat exchanger (LHE) Facilitates heat exchange between the concentrated LiBr solution flowing to the ABS and cool diluted LiBr solution flowing from the ABS to the HGE. Concentrated solution Transfers concentrated LiBr solution from LHE to the supply pipe absorber. In the event the evaporator temperature falls, CPV valve 25 Concentrated proportional will open to allow a proportion of the concentrated LiBr control valve (CPV) solution flowing to the ABS to bypass the tube. When the evaporator temperature increases, CPV will close. 26 Concentrated solution sump Conveys concentrated solution into the absorber distribution tray. Evenly distributes concentrated solution over the 27 Absorber (ABS) tray absorber heat exchange tube. - 19 - No. Component Description Cooling water from the cooling tower flows internally in the absorber heat exchange tube. The cooled, concentrated LiBr solution flowing externally 28 Absorber (ABS) over the tube establishes a vapor pressure under which liquid refrigerant changes phase in the evaporator. The resultant refrigerant vapor from the evaporator is absorbed by the concentrated solution, it thus becomes diluted before returning to the HGE. The suction intake pipe of the solution pump (SP) 29 Dilute solution sump strainer connected to the base of the ABS is provided with a strainer to preclude particles of any foreign matter entering the pump. Required to transfer cool, diluted LiBr solution from the 30 Solution pump base of the ABS to the heat exchanger and thereafter to the HGE. A flow non-return valve (BV) is located between the SP 31 Check valve (BV) and HGE to accommodate the pressure difference backflow potential. And for boil-dry protection of HGE. 32 Dilute solution bypass pipe For leading some dilute solution from LHE outlet to LGE. If the operation of RPV and CPV does not prevent the evaporator temperature from declining to 1°C, SV1 33 Solenoid valve (SV1) solenoid valve will open to allow concentrated LiBr solution to enter the evaporator liquid refrigerant reservoir. 34 Ejector inlet pipe 35 Dilute solution cooling box For leading dilute solution from SP to ejector. Cooling the dilute solution led to the ejector by invalid refrigerant. Using pressured cooled dilute solution as a driving fluid to 36 Ejector make lower pressure than ABS to extact noncondensable gas. It is also extractive in similar principle during heating. 37 Extraction steam pipe 38 Gas-liquid return pipe 39 For leading non-condensable gas from ABS to ejector. Extracted non-condensable gas at ejector and driving fluid are mixed and led to gas separator. Gas storage chamber inlet Pipe for leading some dilute solution to gas storage pipe chamber. - 20 - No. 40 41 42 Component Non-condensable gas storage vessel outlet pipe Non-condensable gas separator Description Pipe for returning dilute solution from gas storage chamber For separating dilute solution from gas-liquid down pipe and gas. Non-condensable gas Pipe for leading non-condensable gas separated at the storage vessel ascending separator to gas storage chamber. pipe 43 Non-condensable gas storage vessel For retaining non-condensable gases accumulating in the absorption circuit. Hydrogen gas is automatically removed from the 44 45 Palladium cell To facilitate the vacuum service procedure to remove service valve stored non-condensable gases. Solution return pipe 47 Absorber service valve 49 cell. Non-condensable gas 46 48 hermetic section of the chiller-heater by the palladium Solution change-over valve (CVR1) Refrigerant evaporation change-over valve (CVR2) Pipe for returning solution from non-condensable gas separator. To facilitate the vacuum service of the absorber area of the absorption circuit. CVR1 is an electrically operated valve for selecting heating and cooling modes of operation. CVR2 is an electrically operated valve for selecting heating and cooling modes of operation. HPS is installed at LGE manifold and the LGE tube pressure is Measured. (LGE≒HGE pressure) 50 HGE pressure sensor (HPS) ･Protection stop at HGE≧750mmHg ･SP inverter is controlled by HGE pressure at cooling mode. 51 No USE No USE - 21 - No. Component Description Safety thermostat for the avoidance of freezing in the EVA comprising three inputs. LT1 - If the EVA temperature falls to 1°C or less, SV1 will be opened to allow concentrated LiBr to enter the 52 LT thermistor refrigerant liquid reservoir. SV1 will close when the EVA temperature rises to 2°C or more. LT2 - If the EVA temperature falls to -2°C or less, the burner will stop operation. When the EVA temperature rises to -1°C or more, the burner will recommence operation. HGE temperature is measured by installing the protection tube to HGE smoke pipe. 53 GP thermistor ･Protection stop at GP≧163℃ ･Input control starts at GP≧161℃ ･Amount of combustion, SP frequency, RPV open angle, CPV open angle are controlled by HGE temperature. For measuring condensed refrigerant temperature. Using for scale warning of cooling water. *LTD=CON(Temp）-CTO(Temp) 54 CON thermistor ･LTD warning: Warning operation point depends on input. ･Warning operation point: LTD≧3.4℃(Input35%) LTD≧6℃(input100%) Input is proportional to 35～100% 55 WTI thermistor WTI sensor is located in the chilled/hot water circuit inlet to measure cooling/heating performance. WTO sensor is located in the chilled/hot water circuit 56 WTO thermistor outlet to measure cooling/heating performance and for combustion proportion control. 57 CTI thermistor 58 CTO thermistor 59 No USE CTI sensor is located in the cooling water circuit inlet to control CT fan etc. CTO sensor is Located in the cooling water circuit outlet for scale warning. No USE - 22 - No. 60 61 Component Description GPSC thermostat HGE protection thermostat -cooling. GPSC thermostat is (reset button on switch) a Bimetal type switch located in the HGE panel board. GPSH thermostat HGE protection thermostat - heating. GPSH thermostat is (reset button on switch) a Bimetal type switch located in the HGE panel board. HGE LiBr level switch. This device is a flow switch 62 HGE level switch (GLS) located internal to the HGE to monitor the LiBr level. If the level falls to the predetermined low limit the burner will be stopped from operating. 63 No USE No USE Chilled/hot water flow switch is a paddle type, located in 64 Flow switch (FS1) the chilled/hot water circuit outlet to monitor the flow volume. 65 No USE 66 Chilled/hot water inlet pipe 67 Chilled/hot water outlet pipe 68 Cooling water inlet pipe 69 Cooling water outlet pipe 70 71 Refrigerant heat exchanger (RHE) RHE solution pipe No USE. To facilitate circulation of the chilled/hot water between the absorption machine and load. To facilitate circulation of the chilled/hot water between the absorption machine and load. To facilitate circulation of cooling water between the absorption machine and cooling tower. To facilitate circulation of cooling water between the absorption machine and cooling tower. Facilitates heat exchange between the dilute LiBr solution flowing to the LGE and the refrigerant vapor flowing from the LGE to the CON. Pipe to lead some of the dilute solution from ABS to RHE. - 23 - 2.4 Cool & Heating Cycle 2.4.1 Cooling Cycle (Numbers correspond to 2.3 Component Description) 1. Dilute LiBr solution is pumped to the high temperature generator, HGE (1), and is heated by the direct-fired gas burner (2). As the Lithium Bromide (LiBr) solution temperature is raised, refrigerant vapor is liberated from solution as the refrigerant is brought to the boiling point. As the refrigerant is liberated the solution concentration is raised, some concentrated solution is entrained in the liberated refrigerant and when it comes in contact with the separator baffles (5) the solution drops back into the HGE sump. The refrigerant vapor travels to the low temperature generator (LGE) tubes. 2. The separated high temperature refrigerant vapor flows to LGE (7) tubes and heats the dilute solution that flows from the low temperature heat exchanger outlet through dilute solution bypass pipe (32). The refrigerant flowing through the LGE tubes generates additional refrigerant vapor out of the dilute solution. The refrigerant vapor in the tubes is condensed as heat is transferred to the dilute solution and the refrigerant liquid flows to the refrigerant heat exchanger RHE (70). Here, the refrigerant liquid is cooled by the heat transfer with dilute solution and then flows to the condenser (10). 3. Refrigerant vapor and low temperature concentrated solution from the LGE (7) are separated by the LGE baffles(8). Refrigerant vapor enters the condenser, (10) where the heat of condensation is removed by the cooling water flowing through the condenser tubes. Some resultant condensate (refrigerant liquid) mixes with the refrigerant vapor that has been condensed in the condenser and collects in the refrigerant storage vessel (11), flows out to the liquid refrigerant sump (15) through refrigerant bypass pipe (14) and through RPV (12), and then on to the evaporator through the evaporator tray drippers (16). As the refrigerant enters the liquid refrigerant sump (15) through the refrigerant bypass pipe (14), the bypass pipe acts as a metering device, the refrigerants pressure is reduced to that of the evaporator, and as the pressure is lowered some of the refrigerant flashes and cools the remaining refrigerant to evaporator temperature. 4. Since the EVA (17) is at a substantially lower pressure than the condenser, the liquid evaporates as it flows over the surface of the chilled-hot water tubes. The heat of circulating chilled water is removed from refrigerant evaporation, transferred to the refrigerant vapor and the temperature of the chilled water is lowered. 5. In the HGE, the high temperature concentrated solution that was separated out of the refrigerant vapor stream by the separator baffle (5) flows to the high temperature heat exchanger HHE (19) via high temperature concentrated solution return pipe (18) and is cooled by a heat transfer with the dilute solution flowing through the HHE toward the HGE. The concentrated solution then flows through an orifice and into a mixing box. The mixing box combines this solution and that returning from the concentrated solution return pipe (22) from the LGE before entering the low temperature heat exchanger LHE (23). - 24 - 6. Refrigerant is liberated out of the dilute solution in the low temperature generator LGE (7) by the high temperature refrigerant vapor flowing through the LGE tubes, and as the liberated vapor rises and comes in contact with the LGE separator baffles the solution falls back into the LGE sump and the refrigerant vapor travels to the condenser. 7. The solution after leaving the LGE is mixed with concentrated solution, leaving the high temperature heat exchanger. As the mixed solution enters the low temperature heat exchanger (23) it is cooled by dilute solution from the absorber (21) before traveling to the concentrated solution sump (26) and then to the absorber dripper trays (27) for equal distribution over the absorber tube bundle. 8. As the equally dripped concentrated solution flows into the absorber it absorbs refrigerant vapor from the evaporator (17). As the refrigerant vapor is absorbed by the concentrated solution it creates a low pressure area that continuously draws refrigerant vapor from the evaporator. In addition the absorbing of refrigerant vapor causes the solution to give up its heat of vaporization. As the refrigerant vapor is condensed it releases its heat of vaporization. In addition as the refrigerant mixes with the concentrated solution and condenses it also releases a heat of dilution which is transferred to the solution. This heat of dilution and the heat of vaporization are transferred to the cooling water flowing through the absorber tubes. As the refrigerant vapor is absorbed into solution the solution concentration is lowered. 9. The solution pump, SP (30), pumps the dilute solution to LGE. This solution is first pumped to RHE (70) via solution pipe (71) then to the LGE. Most of the dilute solution is divided into two after flowing through LHE (23). 50% flows to the HGE (1) via HHE (19), 35% flows to LGE via dilute solution bypass pipe (32), and 15% flows to the RHE via RHE solution pipe (71). 10. When the solution returns to the HGE (1), the dilute solution is again heated by the gas burner and the cycle is repeated from 1～9. The concentrated density of solution of HGE (1) and LGE (7) are nearly equal. 2.4.2 Heating Cycle (Numbers correspond to 2.3 Component Description) 1. Dilute LiBr solution is heated in the HGE by the gas burner in precisely the same manner as the cooling cycle. Hot vapor flows to the evaporator via refrigerant vapor change-over valve CVR2 (49) and the concentrated solution flows to the lower part of the ABS (28) via solution change-over valve CVR1(48). 2. Hot refrigerant vapor flows to the evaporator (17) and condenses on the surface of the evaporator tubes. The heat of condensation is transferred from the circulating hot water, and as heat is transferred the water temperature is raised. 3. Hot refrigerant vapor which is condensed on the surface of the evaporator tubes is condensed and mixes with the concentrated solution. As the refrigerant is absorbed into solution the solution concentration lowers. The SP(30) pumps the dilute solution - 25 - through the LHE (23).The dilute solution is divided into two after flowing through the LHE(23) . One half returns to the lower part of the ABS(28) again via dilute solution bypass pipe(32), LGE (7), concentrated solution return pipe (22), LHE(23) and CPV (25). The other half returns to HGE (1) via HHE (20). 4. Dilute solution which returned to HGE (1) is again heated by the gas burner (2 ) and the cycle is repeated from 1～3. 2.5 MG Series Part Temperature Data (Representative)  In Cooling Operation Input 100% 100% 80% 60% 44% 32 29.5 31 30 29.0 SP outlet temp ℃ 37 35 35 34 32 LHE outlet temp ℃ 75 73 73 71 68 HGE inlet temp ℃ 133 131 129 125 119 RHE outlet temp ℃ 72 69 66 60 56 155 153 148 141 132 80 79 78 76 72 89 87 85 80 75 42 41 41 40 37 RHE inlet temp ℃ 92 89 87 83 77 RHE outlet temp ℃ 60 61 58 57 54 Evaporator temperature ℃ 6.9 6.7 6.6 4.5 4.1 Condenser temperature ℃ 40 38 38 35 33 High temp generator temperature ℃ 158 155 151 143 135 Exhaust gas temperature ℃ 198 195 179 160 143 High temp generator pressure kPa 87 84 73 61 49 Cooling water temp ℃ Dilute solution High temp concentrated HGE outlet temp ℃ solution HHE outlet temp ℃ Low temp concentrated LGE outlet temp ℃ solution Concentrated solution ABS inlet temp ℃ Liquid refrigerant ※ Table above is Representative data of MG150. Value will change by refrigeration capacity, amount of cooling water circulation, level of adhesion of scale and slime, and vacuum level, therefore use only as reference value. - 26 - 2.6 Equilibrium Chart - 27 -