CN204434315U - A kind of sun power and wind energy combine passive vacuum type sea water desalinating plant - Google Patents
A kind of sun power and wind energy combine passive vacuum type sea water desalinating plant Download PDFInfo
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- CN204434315U CN204434315U CN201520028570.1U CN201520028570U CN204434315U CN 204434315 U CN204434315 U CN 204434315U CN 201520028570 U CN201520028570 U CN 201520028570U CN 204434315 U CN204434315 U CN 204434315U
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- passive vacuum
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/141—Wind power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
Abstract
The utility model discloses a kind of sun power and wind energy combines passive vacuum type sea water desalinating plant, comprise fixed solar energy heat collector, Pneumatic heating device, passive vacuum unit, suction distillation seawater desalinating device and strong brine heat regenerator, wherein, described fixed solar energy heat collector and Pneumatic heating device are together connected a heat collection water tank, heat collection water tank connects strong brine heat regenerator, strong brine heat regenerator connects passive vacuum unit, and passive vacuum unit is together connected suction distillation seawater desalinating device with strong brine heat regenerator.The utility model solves sun power and wind energy instability problem, and can work in device daytime and evening operation, produces fresh water; Adopt super heat-conductive pipe vacuum tube heat collection function, thermal-arrest quick heating, solve pipe scale problems, the stable performance of collecting system.
Description
Technical field
The utility model relates to energy technology field, particularly relates to a kind of sun power and wind energy combines passive vacuum type sea water desalinating plant.
Background technology
Sun power is a kind of desirable, free of contamination renewable resources, and existing solar thermal utilization is by support, thermal-collecting tube and water tank composition.Rely on thermal-collecting tube thermal-arrest and water in heating water tank, but its shortcoming be sunshine shortage and night result of use undesirable.In order to address these problems, numerous experts and scholars and technician have found out a lot of way.
Chinese utility model patent " wind and solar energy water-heater " (application number: 96232395.0; Notification number CN2280248Y) devise a kind of solar wind-energy hot water apparatus, its device comprises wind power generation plant, thermal-collecting tube, there is a hot and cold two-chamber heat collection water tank, thermal-collecting tube is connected with the hot well tank of header tank, low-voltage electric heating is placed in the hot well tank of header tank, and low-voltage electric heating is connected with the power supply of wind power generation plant by guiding.Its advantage takes full advantage of two kinds of natural sources, makes water continuous heating, not only energy-conservation but also easy to use.Hot and cold two-chamber header tank, because pressure is identical, giving and regulate water temperature to bring convenience, is a kind of desirable energy-conservation, safety water heater.
Chinese utility model patent " wind and solar energy combined type water heater " (application number: 200520095792.1; Notification number CN2795744Y) devise a kind of solar wind-energy hot water apparatus, its device comprises support, support is provided with water tank, water tank is connected with solar energy heat collection pipe, support is provided with aerogenerator, solar energy heat collection pipe lower end is provided with heating tube, be provided with heating unit and temp control switch in thermal-collecting tube, temp control switch is connected with aerogenerator by wire with store battery.This device has filled aerogenerator on common solar water heater, and the water of the electric power produced by aerogenerator to heating tube is heated, and makes sun power not need conventional electric power to heat when sunlight deficiency, saves the energy.
Chinese utility model patent " wind and solar energy water-heater " (application number: 02273686.7, notification number CN2599272Y) devise a kind of solar wind-energy water-heater, its device has a support, support installs thermal-collecting tube and water tank respectively, an open holes is had at its water tank, support is provided with windmill support with open holes correspondence position on water tank, windmill mid-stent is provided with bearing, described corresponding open holes place plug-in mounting on water tank also fastening sidewall has the round shape heat-producing machine of several intra vanes, said heat-producing machine sidewall also has water hole, on windmill support, corresponding bearing portion is equipped with windmill shaft, fan blade is equipped with at windmill shaft top, said windmill shaft bottom is inserted in heat-producing machine, and windmill shaft inserts heat-producing machine position and intra vane interleaved bits is equipped with rotary shaft blade, between windmill shaft and heat-producing machine socket, wear ring is housed.
Chinese utility model patent " sun power, wind energy co-generated water heater " (application number: 200720184922.8, notification number CN201104034Y) devise a kind of solar wind-energy water-heater, its device comprises support, the water tank and solar energy heat collection pipe that inner chamber interconnects is connected to support, support shell is provided with inside water tank, in support shell, be provided with friction fixed wheel contact with friction member, friction member is contained on main shaft, it is outer and connect with fan blade that support shell is stretched out in the main shaft upper end be supported in support shell, support shell inner chamber is filled with medium, support shell is provided with import and the outlet of medium, the inner chamber of water tank is positioned at together with the import of medium and the radiating pipe of outlet outside support shell, be connected with radiating pipe and be connected with medium circulation pump.Namely this device make use of wind energy, make use of sun power again, accelerates the rising of water temperature, make use of natural energy further.
Chinese utility model patent " driven flash-evaporation solar seawater desalination device " (application number: 201020199084; ) first get rid of non-condensable gases in flashing chamber and condenser before this device busy, and in the course of the work by constantly getting rid of to the intermittent opening and closing of by-pass valve control the non-condensable gases produced in Seawater Desalination Project; Flashing chamber is connected with fresh-water tank with the sea water tank on ground respectively by pipeline with condenser, and the pressure official post flashing chamber of pipe maritime interior waters is in low-pressure state, thus makes the boiling point lowering of flashing chamber maritime interior waters, and flash distillation occurs; After seawater heats in interchanger, rely on syphonic effect to enter flashing chamber, passive flash distillation, and the low pressure in flashing chamber does not need the maintenance of vacuum pump.Take full advantage of sun power that is reproducible, environmental protection, efficiency is high, and cost is low, easy to operate.
Although said apparatus and method utilize solar thermal energy and wind energy to accelerate the rising of water temperature to a certain extent, but be not incubated owing to there is water tank, or do not have combination to be used in sea water desaltination, so there is no the object that a kind of device or method can utilize solar thermal energy wind energy to combine to realize vacuum flashing formula sea water desaltination under consecutive low temperature.
Utility model content
The utility model is in order to solve the problem, propose a kind of sun power and wind energy combines passive vacuum type sea water desalinating plant, adopting passive vacuum flashing formula desalination technology, utilizing the condensation latent heat of condenser to a seawater preheating, strong brine heat recuperation, to entering seawater secondary preheating; This device makes simple, cheap, avoids the etching problem to equipment.
To achieve these goals, the utility model adopts following technical scheme:
A kind of sun power and wind energy combine passive vacuum type sea water desalinating plant, comprise fixed solar energy heat collector, Pneumatic heating device, passive vacuum unit, suction distillation seawater desalinating device and strong brine heat regenerator, wherein, described fixed solar energy heat collector and Pneumatic heating device are together connected a heat collection water tank, heat collection water tank connects strong brine heat regenerator, strong brine heat regenerator connects passive vacuum unit, and passive vacuum unit is together connected suction distillation seawater desalinating device with strong brine heat regenerator.
Described fixed solar energy heat collector, comprise support, several valve tubes and several super heat-conductive pipes, wherein, each valve tube internal sleeve is equipped with a super heat-conductive pipe, the even side by side parallel of valve tube is distributed on support, and heat collection water tank inside is fixed on the top of super heat-conductive pipe.
Described Pneumatic heating device, comprise fan blade, rotating shaft, impeller, rolling steel balls, pedestal and wear ring, wherein, fan blade has three, three fan blades are circumferentially evenly fixed in rotating shaft, and rotating shaft bottom connects impeller, and impeller is connected on pedestal by rolling steel balls, rotating shaft, impeller, rolling steel balls and pedestal are fixed in heat collection water tank, and seal ring seal is passed through in the junction of rotating shaft and heat collection water tank.
Described passive vacuum unit, comprise evaporator room, condensing chamber and two thin straight tubes, wherein, evaporator room connects condensing chamber by pipeline, and condensing chamber lower end connects two thin straight tubes, and the other end of two thin straight tubes connects strong brine water tank and fresh-water tank respectively.
Described suction distillation seawater desalinating device, comprise fan suction device, strong brine water tank and water circulating pump, wherein, fan suction device is fixed on the upper end of evaporator room, strong brine water tank is connected to strong brine heat regenerator by pipeline, strong brine heat regenerator connects evaporator room, and water circulating pump is connected on the thin straight tube of connection condensing chamber and fresh-water tank.
Described heat collection water tank is connected with nozzle by pipeline, and nozzle is installed on evaporation chamber.
Described thin straight tube and pipeline are equipped with one-way cock.
Described one-way cock communicates with Controlling System.
Described strong brine water tank and fresh-water tank are provided with overflow port, and the height of two overflow ports is consistent.
The beneficial effects of the utility model are:
1, solve sun power and wind energy instability problem, can work in device daytime and evening operation, produce fresh water;
2, solar thermal collection system adopts super heat-conductive pipe vacuum tube heat collection function, and thermal-arrest quick heating, does not have seawater that pipe scale problems is solved, the stable performance of collecting system in pipe;
3, owing to adopting passive vacuum type structure, the normal evaporative condenser of assurance device low temperature environment, whole system long operational time, water production rate is high;
4, wind energy direct heating, adopts thermal oil as working medium inside heating machine, to impeller lubrication and to be converted into thermo-efficiency high, etching problem is resolved;
5, adopt blower fan suction secondary to produce vacuum tightness and accelerate evaporator room evaporation of seawater, improve rate of evaporation and producing water ratio;
6, in condenser, steam coagulation latent heat and strong brine waste heat are all reclaimed by interchanger, and save manufacturing cost, system performance parameter is high, and energy consumption is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is fixed solar energy heat collector of the present utility model and Pneumatic heating device schematic diagram.
Wherein, 1, evaporator room, 2, condensing chamber, 3, nozzle, 4, strong brine heat regenerator, 5, heat collection water tank, 6, solar superconducting heat pipe collector, 7, blower fan heating combined equipment, 8, strong brine water tank, 9, fresh water tanks, 10, water circulating pump, 11, one-way cock I, 12, one-way cock II, 13, one-way cock III, 14, one-way cock IV, 15 one-way cock V, 16, controller, 17, fan suction device, 18, fan blade, 19, rotating shaft, 20, impeller, 21, pedestal, 22, wear ring, 23, valve tube, 24, super heat-conductive pipe, 25, rolling steel balls, 26, support.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, a kind of sun power and wind energy combine passive vacuum type sea water desalinating plant, comprise fixed solar energy heat collector, Pneumatic heating device, passive vacuum unit, suction distillation seawater desalinating device and strong brine heat regenerator, wherein, described fixed solar energy heat collector and Pneumatic heating device are together connected a heat collection water tank 5, heat collection water tank 5 connects strong brine heat regenerator 4, strong brine heat regenerator 4 connects passive vacuum unit, and passive vacuum unit is together connected with strong brine heat regenerator 4 and aspirates distillation seawater desalinating device.
As shown in Figure 2, fixed solar energy heat collector, comprise support 26, several valve tubes 23 and several super heat-conductive pipes 24, wherein, each valve tube 23 internal sleeve is equipped with a super heat-conductive pipe 24, valve tube 23 evenly side by side parallel is distributed on support 26, and heat collection water tank 5 inside is fixed on the top of super heat-conductive pipe 24.
Pneumatic heating device, comprise fan blade 18, rotating shaft 19, impeller 20, rolling steel balls 25, pedestal 21 and wear ring 22, wherein, fan blade 18 has three, three fan blades 18 are circumferentially evenly fixed in rotating shaft 19, and rotating shaft 19 bottom connects impeller 20, and impeller 20 is connected on pedestal 21 by rolling steel balls 25, rotating shaft 19, impeller 20, rolling steel balls 25 and pedestal 21 are fixed in heat collection water tank 5, and rotating shaft 19 is sealed by wear ring 22 with the junction of heat collection water tank 5.
Passive vacuum unit, comprises evaporator room 1, condensing chamber 2 and two thin straight tubes, and wherein, evaporator room 1 connects condensing chamber 2 by pipeline, and condensing chamber 2 lower end connects two thin straight tubes, and the other end of two thin straight tubes connects strong brine water tank 8 and fresh-water tank 9 respectively.
Suction distillation seawater desalinating device, comprise fan suction device 17, strong brine water tank 8 and water circulating pump 10, wherein, fan suction device 17 is fixed on the upper end of evaporator room 1, strong brine water tank 8 is connected to strong brine heat regenerator 4 by pipeline, strong brine heat regenerator 4 connects evaporator room 1, and water circulating pump 10 is connected on the thin straight tube of connection condensing chamber 2 and fresh-water tank 9.
Heat collection water tank 5 connects nozzle 3 by pipeline, and it is inner that nozzle 3 is installed on evaporator room 1.
Thin straight tube and pipeline are equipped with one-way cock.
One-way cock communicates with controller 16.
Strong brine water tank 8 and fresh-water tank 9 are provided with overflow port, and the height of two overflow ports is consistent.
The thin straight tube be connected with strong brine water tank 8 is connected to one-way cock I 11, III 13, the thin straight tube be connected with fresh-water tank 9 is provided with one-way cock II 12, sea intake has valve IV 14, valve V 15 is equipped with in evaporator room 1 upper end, all one-way cocks are control valve, all adopt magnetic valve and access controller 16.Evaporator room 1 installs nozzle 3 and fan suction device 17, and water vapour enters condensing chamber 2 and is condensed into fresh water; Strong brine heat regenerator 4 is housed below evaporator room 1.
Vacuum produces: one-way cock III 13, one-way cock V 15 open, one-way cock I 11, one-way cock II 12, one-way cock I V 14 close, seawater squeezes into evaporator room 1 and condensing chamber 2 by water circulating pump 10, discharges the inside air by the most significant end of one-way cock V 15; Fill rear closing one-way valve door III 13, one-way cock V 15, open one-way cock I 11, one-way cock II 12, seawater is because gravity is by thin straight tube inflow strong brine water tank 8 and fresh-water tank 9, and in thin straight tube, water column produces the water colunm height of about 10m, is equilibrated at external atmosphere pressure; Evaporator room 1 and condensing chamber 2 is made to form vacuum.
Workflow: one-way cock III 13, open one-way cock I V 14, seawater enters condenser 2 by water circulating pump 10, condensed steam, and seawater obtains preheating, flows into strong brine heat regenerator 4, reclaims strong brine heat.Then heat collection water tank 5 is entered, absorb the heat of fixed solar energy heat collector, Pneumatic heating device, seawater is heated up, water smoke is sprayed into finally by nozzle 3, rapid evaporation under evaporator room 1 vacuum, then introduce condenser 2 fast by fan suction device 17 and be cooled to fresh water, flow into fresh-water tank 9 by fresh water tubule, finally discharged by overflow port and collect.The strong brine of non-vaporization heat first enters strong brine heat regenerator 4, then enters strong brine water tank 8 by tubule, and overflow port is discharged and collected strong brine.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (9)
1. a sun power and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: comprise fixed solar energy heat collector, Pneumatic heating device, passive vacuum unit, suction distillation seawater desalinating device and strong brine heat regenerator, wherein, described fixed solar energy heat collector and Pneumatic heating device are together connected a heat collection water tank, heat collection water tank connects strong brine heat regenerator, strong brine heat regenerator connects passive vacuum unit, and passive vacuum unit is together connected suction distillation seawater desalinating device with strong brine heat regenerator.
2. a kind of sun power as claimed in claim 1 and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: described fixed solar energy heat collector, comprise support, several valve tubes and several super heat-conductive pipes, wherein, each valve tube internal sleeve is equipped with a super heat-conductive pipe, the even side by side parallel of valve tube is distributed on support, and heat collection water tank inside is fixed on the top of super heat-conductive pipe.
3. a kind of sun power as claimed in claim 1 and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: described Pneumatic heating device, comprise fan blade, rotating shaft, impeller, rolling steel balls, pedestal and wear ring, wherein, fan blade has three, three fan blades are circumferentially evenly fixed in rotating shaft, rotating shaft bottom connects impeller, impeller is connected on pedestal by rolling steel balls, rotating shaft, impeller, rolling steel balls and pedestal are fixed in heat collection water tank, and seal ring seal is passed through in the junction of rotating shaft and heat collection water tank.
4. a kind of sun power as claimed in claim 1 and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: described passive vacuum unit, comprise evaporator room, condensing chamber and two thin straight tubes, wherein, evaporator room connects condensing chamber by pipeline, condensing chamber lower end connects two thin straight tubes, and the other end of two thin straight tubes connects strong brine water tank and fresh-water tank respectively.
5. a kind of sun power as claimed in claim 1 and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: described suction distillation seawater desalinating device, comprise fan suction device, strong brine water tank and water circulating pump, wherein, fan suction device is fixed on the upper end of evaporator room, strong brine water tank is connected to strong brine heat regenerator by pipeline, and strong brine heat regenerator connects evaporator room, and water circulating pump is connected on the thin straight tube of connection condensing chamber and fresh-water tank.
6. a kind of sun power as claimed in claim 2 and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: described heat collection water tank is connected with nozzle by pipeline, and nozzle is installed on evaporation chamber.
7. a kind of sun power as claimed in claim 4 and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: described thin straight tube and pipeline are equipped with one-way cock.
8. a kind of sun power as claimed in claim 7 and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: described one-way cock communicates with Controlling System.
9. a kind of sun power as claimed in claim 4 and wind energy combine passive vacuum type sea water desalinating plant, it is characterized in that: described strong brine water tank and fresh-water tank are provided with overflow port, and the height of two overflow ports is consistent.
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| CN201520028570.1U CN204434315U (en) | 2015-01-15 | 2015-01-15 | A kind of sun power and wind energy combine passive vacuum type sea water desalinating plant |
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| CN201520028570.1U CN204434315U (en) | 2015-01-15 | 2015-01-15 | A kind of sun power and wind energy combine passive vacuum type sea water desalinating plant |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556278A (en) * | 2015-01-15 | 2015-04-29 | 济南祥丰能源技术有限公司 | Solar energy and wind energy combined passive vacuum sea water desalination device |
| CN106115830A (en) * | 2016-08-05 | 2016-11-16 | 重庆市三耕储节能环保科技有限公司 | A kind of renewable sources of energy sea water automatic processing device |
| WO2019051313A1 (en) * | 2017-09-08 | 2019-03-14 | Northrup, Incorporated | Self-regulating vacuum still |
| US11502322B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11502323B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
-
2015
- 2015-01-15 CN CN201520028570.1U patent/CN204434315U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556278A (en) * | 2015-01-15 | 2015-04-29 | 济南祥丰能源技术有限公司 | Solar energy and wind energy combined passive vacuum sea water desalination device |
| CN106115830A (en) * | 2016-08-05 | 2016-11-16 | 重庆市三耕储节能环保科技有限公司 | A kind of renewable sources of energy sea water automatic processing device |
| WO2019051313A1 (en) * | 2017-09-08 | 2019-03-14 | Northrup, Incorporated | Self-regulating vacuum still |
| US11502322B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11502323B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11563229B1 (en) | 2022-05-09 | 2023-01-24 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11611099B1 (en) | 2022-05-09 | 2023-03-21 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11699803B1 (en) | 2022-05-09 | 2023-07-11 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
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