CN101788174B - Evaporative cooling and air-cooled heat pump type composite water chiller-heater unit - Google Patents

Evaporative cooling and air-cooled heat pump type composite water chiller-heater unit Download PDF

Info

Publication number
CN101788174B
CN101788174B CN2010100137400A CN201010013740A CN101788174B CN 101788174 B CN101788174 B CN 101788174B CN 2010100137400 A CN2010100137400 A CN 2010100137400A CN 201010013740 A CN201010013740 A CN 201010013740A CN 101788174 B CN101788174 B CN 101788174B
Authority
CN
China
Prior art keywords
water
air
heat pump
cooled heat
cooler
Prior art date
Application number
CN2010100137400A
Other languages
Chinese (zh)
Other versions
CN101788174A (en
Inventor
黄翔
孙铁柱
汪超
于优城
刘小文
Original Assignee
西安工程大学
西安井上人工环境有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 西安工程大学, 西安井上人工环境有限公司 filed Critical 西安工程大学
Priority to CN2010100137400A priority Critical patent/CN101788174B/en
Publication of CN101788174A publication Critical patent/CN101788174A/en
Application granted granted Critical
Publication of CN101788174B publication Critical patent/CN101788174B/en

Links

Abstract

The invention discloses an evaporative cooling and air-cooled heat pump type composite water chiller-heater unit, comprising an evaporative water chilling unit, an air-cooled heat pump water chiller-heater unit and a direct evaporative cooler which are connected and combined through a pipe network, wherein the evaporative water chilling unit comprises a high-temperature chilled water air cooler, a low-temperature chilled water air cooler and direct evaporative coolers; the high-temperature chilled water air cooler and the low-temperature chilled water air cooler are connected in parallel; the air-cooled heat pump water chiller-heater unit consists of a condenser, an evaporator and a compressor forming a closed loop; the location of the air-cooled heat pump water chiller-heater unit is arranged to lead the let-in air at one position of the air-cooled heat pump water chiller-heater unit to be from the discharged air of the evaporative water chilling unit, and three direct evaporative coolers are respectively arranged at other three air-inlet surfaces. For the composite water chiller-heater unit provided by the invention, the high-temperature chilled water produced through the evaporative water chilling unit and the low-temperature chilled water produced through the air-cooled heat pump water chiller-heater unit are mixed according to a certain proportion for cooling for users in summer, and the air-cooled heat pump water chiller-heater unit is singly opened for heating for the user during the operation in winter, thereby having obvious energy-saving effect.

Description

The compound hot and cold water unit of evaporative cooling and air-cooled heat pump formula

Technical field

The invention belongs to the air conditioner refrigerating technical field, be specifically related to a kind of compound hot and cold water unit of forming by vaporation-type handpiece Water Chilling Units, air-cooled heat pump water chiller-heater units and direct evaporative cooler.

Background technology

The Evaporative Cooling Air Conditioning technology is to utilize the dry-bulb temperature of regenerative resource dry air in the natural environment and dew-point temperature poor; Obtain a kind of environment-friendly high-efficiency and the economic type of cooling of cold through the wet exchange of the heat between water and the air; Have lower cooling device cost, can significantly reduce power consumption and peak times of power consumption to the requirement of electric energy, can reduce the characteristics of the discharge capacity of greenhouse gases and CFC; Be called as " zero cost Refrigeration Technique ", " green air conditioner " and " bionical air-conditioning "; Be energy-conserving and environment-protective and the refrigeration and air-conditioning technical of sustainable development truly, in the energy-saving and emission-reduction of China, play an important role.

Adopt the Evaporative Cooling Air Conditioning technology to produce high temperature cold water and have obvious energy-saving effect, yet the vaporation-type handpiece Water Chilling Units receives the influence and the restriction of outdoor climate conditions after all, the water temperature that is obtained is between the wet-bulb temperature and dew-point temperature of outdoor air.In middle humidity or high humility area, the temperature of the high temperature cold water of being produced is difficult to stablize and reach the requirement of regulation.Simultaneously, the vaporation-type handpiece Water Chilling Units can only provide high temperature cold water summer, can't satisfy the needs of winter air-conditioning hot water.Therefore, present vaporation-type handpiece Water Chilling Units to be used in dry area, and the use in middle humidity or high humility area is restricted.

Summary of the invention

The object of the present invention is to provide the compound hot and cold water unit of a kind of evaporative cooling and air-cooled heat pump formula; The vaporation-type handpiece Water Chilling Units is combined with air-cooled heat pump water chiller-heater units; And it is direct evaporative cooler and air-cooled heat pump water chiller-heater units is integrated in addition; The Evaporative Cooling Air Conditioning technology is not only used in dry area, and can be used in middle humidity or high humility area.

The technical scheme that the present invention adopted is, the compound hot and cold water unit of evaporative cooling and air-cooled heat pump formula is formed by connecting to combine through pipe network between vaporation-type handpiece Water Chilling Units, air-cooled heat pump water chiller-heater units and the direct evaporative cooler,

The vaporation-type handpiece Water Chilling Units comprises high temperature cold water aerial cooler and the low-temperature cold water aerial cooler that is in parallel; The top of high temperature cold water aerial cooler is provided with air inlet, also comprises water fender and exhaust blower that direct evaporative cooler a and direct evaporative cooler a top is provided with;

Air-cooled heat pump water chiller-heater units is made up of the condenser that constitutes the closed-loop path, evaporimeter and compressor, and the position that air-cooled heat pump water chiller-heater units is set makes place's air intake of air-cooled heat pump water chiller-heater units come from the air draft of vaporation-type handpiece Water Chilling Units;

Other three air intake surface places in air-cooled heat pump water chiller-heater units are provided with direct evaporative cooler b, direct evaporative cooler c and direct evaporative cooler d respectively.

Characteristics of the present invention also are,

Direct evaporative cooler a comprises that the water tank a of the nozzle a, filler a and the bottom that set gradually from top to bottom forms, and is provided with pipeline and is connected with nozzle a through water pump a in the water tank a.

Water tank a is connected with water collector a through pipeline respectively with evaporimeter; Water collector a is connected with user side through pipeline, and the high temperature cold water aerial cooler is connected with water collector b through pipeline, and user side also is connected with water knockout drum through pipeline; Be used for backwater input water knockout drum with user side; Water knockout drum is connected with water collector b with the low-temperature cold water aerial cooler respectively through pipeline, and water collector b is connected with evaporimeter through one road pipeline, and water collector b also is connected with nozzle a through another road pipeline.

Direct evaporative cooler b is made up of the water tank b of nozzle b, filler b and bottom from top to bottom successively, pipeline is set in the water tank b is connected with nozzle b through water pump b.

Compound hot and cold water unit of the present invention; Make that three places are equipped with direct evaporative cooler in the air intake surface everywhere of condenser of air-cooled heat pump; Outdoor air to being inhaled into carries out precooling treatment; Air intake of another place's air intake surface is the air draft of vaporation-type handpiece Water Chilling Units, thereby replaces the condensation efficiency of outdoor air air-cooled heat pump condenser when improving summer operation.The low-temperature cold water produced of the high temperature cold water produced of vaporation-type handpiece Water Chilling Units and air-cooled heat pump water chiller-heater units mixes by a certain percentage in addition, makes high temperature or the low-temperature cold water temperature stabilization and the needs that satisfy different water temperatures produced.The main feature of the compound hot and cold water unit of the present invention also is: 1, the vaporation-type handpiece Water Chilling Units is combined with air-cooled heat pump water chiller-heater units, for air-conditioning provides hot and cold water the whole year; 2, the air intake that the air draft of vaporation-type handpiece Water Chilling Units is used for the air-cooled heat pump condenser is to improve condensation efficiency; 3, with outdoor new wind earlier through direct evaporative cooler precooling cooling back as the air intake of air-cooled heat pump condenser to improve condensation efficiency.This compound hot and cold water unit vaporation-type in summer handpiece Water Chilling Units and air-cooled heat pump are opened simultaneously high temperature cold water are provided; Only open Air-Cooled Heat Pump Unit hot water is provided winter, finally has remarkable energy saving effect.

Description of drawings

Fig. 1 is the structural representation of the compound hot and cold water unit of the present invention;

Fig. 2 is the vertical view of Fig. 1.

Among the figure, 1 air inlet, 2 water fenders, 3 nozzle a, 4 exhaust blowers, the blower fan a of 5 air-cooled heat pumps; The blower fan b of 6 air-cooled heat pumps, 7 condensers, 8 nozzle b, 9 filler b, 10 direct evaporative cooler b, 11 water tank b; 12 water pump b, 13 compressors, 14 evaporimeters, 15 water pump a, 16 water tank a; 17 direct evaporative cooler a, 18 filler a, 19 low-temperature cold water aerial coolers, 20 high temperature cold water aerial coolers, 21 direct evaporative cooler c; 22 air-cooled heat pump water chiller-heater units, 23 direct evaporative cooler d, 24 water collector a, 25 water collector b, 26 water knockout drums.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is elaborated.

Compound hot and cold water unit of the present invention is composited by vaporation-type handpiece Water Chilling Units, air-cooled heat pump water chiller-heater units and direct evaporative cooler.Fig. 1, Fig. 2 are arranged in the embodiment in the same cabinet with vaporation-type handpiece Water Chilling Units, air-cooled heat pump water chiller-heater units and three direct evaporative coolers, have showed the relative position of vaporation-type handpiece Water Chilling Units, air-cooled heat pump water chiller-heater units and three direct evaporative coolers.

The vaporation-type handpiece Water Chilling Units comprises the high temperature cold water aerial cooler 20 and low-temperature cold water aerial cooler 19 that is in parallel; The top of high temperature cold water aerial cooler 20 is provided with air inlet 1; Also comprise direct evaporative cooler a17, and the water fender 2 and exhaust blower 4 of the setting of direct evaporative cooler a17 top.Wherein direct evaporative cooler a17 is made up of the water tank a16 of nozzle a3, filler a18 and bottom from top to bottom successively, pipeline is set in the water tank a16 is connected with nozzle a3 through water pump a15.

Air-cooled heat pump water chiller-heater units 22 comprises condenser 7, evaporimeter 14 and the compressor 13 that constitutes the closed-loop path, and the top in loop is provided with the blower fan a5 of air-cooled heat pump and the blower fan b6 of air-cooled heat pump.The position that is provided with of air-cooled heat pump water chiller-heater units 22 makes place's air intake come from the air draft of vaporation-type handpiece Water Chilling Units, at other three air intake surface places of air-cooled heat pump water chiller-heater units 22 direct evaporative cooler b10, direct evaporative cooler c21 and direct evaporative cooler d23 is set respectively.Direct evaporative cooler b10 is made up of the water tank b11 of nozzle b8, filler b9 and bottom from top to bottom successively, pipeline is set in the water tank b11 is connected with nozzle b8 through water pump b12.The structure of direct evaporative cooler c21 and the direct evaporative cooler d23 structure with direct evaporative cooler b10 respectively is identical.

Air-cooled heat pump water chiller-heater units 22 employings wherein three place's air intakes are outdoor airs of handling through direct evaporative cooler, and other place's air intake is from the air draft of vaporation-type handpiece Water Chilling Units.The layout of this structure is in order to reduce the temperature of air-cooled heat pump condenser air intake, raising condensation efficiency, and then the Energy Efficiency Ratio of raising air-cooled heat pump water chiller-heater units.Simultaneously, direct evaporative cooler also plays the catharsis to outdoor air, avoids dust to drop on condenser heat exchanger tube surface, influences the condensation radiating effect.

Water tank a16 is connected with water collector a24 through pipeline respectively with evaporimeter 14; Water collector a24 is connected with user side through pipeline; High temperature cold water aerial cooler 20 is connected with water collector b25 through pipeline; User side also is connected with water knockout drum 26 through pipeline, is used for the backwater input water knockout drum 26 with user side, and water knockout drum 26 is connected with water collector b25 with low-temperature cold water aerial cooler 19 respectively through pipeline; Water collector b25 is connected with evaporimeter 14 through one road pipeline, and water collector b25 also is connected with nozzle a3 through another road pipeline.

The high temperature cold water that high-temperature water in the high temperature cold water aerial cooler 20 is produced from the vaporation-type handpiece Water Chilling Units; Water in the low-temperature cold water aerial cooler 19 is from through the backwater behind the user; The high temperature cold water part that the vaporation-type handpiece Water Chilling Units is produced is led to high temperature cold water aerial cooler 20, and another part mixes towards the user with the low-temperature cold water that air-cooled heat pump water chiller-heater units 22 is produced mutually; The air draft of vaporation-type handpiece Water Chilling Units is as the air intake of air-cooled heat pump condenser 7.

The course of work of the compound hot and cold water unit of the present invention:

1, outdoor air has everywhere following in the flow process of this unit during summer operation:

1) outdoor air passes through air inlet 1, high temperature cold water aerial cooler 20, low-temperature cold water aerial cooler 19, direct evaporative cooler a17, water fender 2, exhaust blower 4 successively, discharges via the blower fan a5 of air-cooled heat pump and the blower fan b6 of air-cooled heat pump through the condenser 7 of air-cooled heat pump at last.Outdoor air is at first tentatively lowered the temperature at high temperature cold water aerial cooler 20 in this process; Further cooling in low-temperature cold water aerial cooler 19 then; In direct evaporative cooler a17, carry out the wet exchange of heat at last, promptly make the high temperature cold water air draft more much lower of getting back this moment than outside air temperature.

2) outdoor air is discharged by the blower fan a5 of air-cooled heat pump and the blower fan b6 of air-cooled heat pump through the condenser 7 of direct evaporative cooler b10, air-cooled heat pump successively at last.Outdoor air in this process has been carried out precooling treatment by direct evaporative cooler b10 and has been able to the temperature reduction.

3) outdoor air is discharged by the blower fan a5 of air-cooled heat pump and the blower fan b6 of air-cooled heat pump through the condenser 7 of direct evaporative cooler c21, air-cooled heat pump successively at last.Outdoor air in this process has been carried out precooling treatment by direct evaporative cooler c21 and has been able to the temperature reduction.

4) outdoor air is discharged by the blower fan a5 of air-cooled heat pump and the blower fan b6 of air-cooled heat pump through the condenser 7 of direct evaporative cooler d23, air-cooled heat pump successively at last.Outdoor air in this process has been carried out precooling treatment by direct evaporative cooler d23 and has been able to the temperature reduction.

2, the flow process of water system during summer operation:

The high temperature cold water part that the vaporation-type handpiece Water Chilling Units is produced is got back to water collector b25 at last towards high temperature cold water aerial cooler 20; Another part high temperature cold water is mixed in water collector a24 with the low-temperature cold water that air-cooled heat pump water chiller-heater units 22 is produced in proportion; Be user's cooling then, get back to water knockout drum 26 by the user at last; A part of low-temperature cold water leads to low-temperature cold water aerial cooler 19 and gets back to water collector b25 at last in the water knockout drum 26, and other backwater is got back to water collector b25 at last through miscellaneous equipment.Finally continue spray from a part of by a certain percentage nozzle a3 that gets back to the direct evaporative cooler a17 of vaporation-type handpiece Water Chilling Units of water collector b25, another part is got back in the evaporimeter 14 of air-cooled heat pump.

3, during winter operation, the water supply of vaporation-type handpiece Water Chilling Units and three direct evaporative cooler b10, direct evaporative cooler c21, direct evaporative cooler d23 is quit work, only let air-cooled heat pump water chiller-heater units 22 work come heating for the user.This moment, the hot water produced of air-cooled heat pump water chiller-heater units was sent to the user through water collector a24, got back to water knockout drum 26 then and returned the evaporimeter 14 that water collector b25 gets back to air-cooled heat pump at last (opposite evaporimeter 14 can become the effect of condenser when heat pump moves in the winter time and during summer operation).

Claims (4)

1. the compound hot and cold water unit of evaporative cooling and air-cooled heat pump formula is characterized in that, this compound hot and cold water unit is formed by connecting to combine through pipe network between vaporation-type handpiece Water Chilling Units, air-cooled heat pump water chiller-heater units (22) and the direct evaporative cooler,
Described vaporation-type handpiece Water Chilling Units comprises high temperature cold water aerial cooler (20) and the low-temperature cold water aerial cooler (19) that is in parallel; The top of high temperature cold water aerial cooler (20) is provided with air inlet (1), also comprises water fender (2) and exhaust blower (4) that direct evaporative cooler a (17) and direct evaporative cooler a (17) top is provided with;
Described air-cooled heat pump water chiller-heater units (22) is made up of the condenser that constitutes the closed-loop path (7), evaporimeter (14) and compressor (13), and the position that air-cooled heat pump water chiller-heater units (22) is set makes place's air intake of air-cooled heat pump water chiller-heater units (22) come from the air draft of vaporation-type handpiece Water Chilling Units;
Other three air intake surface places in air-cooled heat pump water chiller-heater units (22) are provided with direct evaporative cooler b (10), direct evaporative cooler c (21) and direct evaporative cooler d (23) respectively.
2. according to the described compound hot and cold water unit of claim 1; It is characterized in that; Described direct evaporative cooler a (17) comprises that the water tank a (16) of the nozzle a (3), filler a (18) and the bottom that set gradually from top to bottom forms, and is provided with pipeline and is connected with high temperature cold water aerial cooler (20) through water pump a (15) in the water tank a (16).
3. according to the described compound hot and cold water unit of claim 2; It is characterized in that; Described water tank a (16) is connected with water collector a (24) through pipeline respectively with evaporimeter (14); Water collector a (24) is connected with user side through pipeline, and described high temperature cold water aerial cooler (20) is connected with water collector b (25) through pipeline, and user side also is connected with water knockout drum (26) through pipeline; Be used for backwater input water knockout drum (26) with user side; Water knockout drum (26) is connected with water collector b (25) with low-temperature cold water aerial cooler (19) respectively through pipeline, and water collector b (25) is connected with evaporimeter (14) through one road pipeline, and water collector b (25) also is connected with nozzle a (3) through another road pipeline.
4. according to the described compound hot and cold water unit of claim 1; It is characterized in that; Described direct evaporative cooler b (10) is made up of the water tank b (11) of nozzle b (8), filler b (9) and bottom from top to bottom successively, pipeline is set in the water tank b (11) is connected with nozzle b (8) through water pump b (12).
CN2010100137400A 2010-01-15 2010-01-15 Evaporative cooling and air-cooled heat pump type composite water chiller-heater unit CN101788174B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010100137400A CN101788174B (en) 2010-01-15 2010-01-15 Evaporative cooling and air-cooled heat pump type composite water chiller-heater unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010100137400A CN101788174B (en) 2010-01-15 2010-01-15 Evaporative cooling and air-cooled heat pump type composite water chiller-heater unit

Publications (2)

Publication Number Publication Date
CN101788174A CN101788174A (en) 2010-07-28
CN101788174B true CN101788174B (en) 2012-06-27

Family

ID=42531489

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010100137400A CN101788174B (en) 2010-01-15 2010-01-15 Evaporative cooling and air-cooled heat pump type composite water chiller-heater unit

Country Status (1)

Country Link
CN (1) CN101788174B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102168897B (en) * 2011-03-18 2012-08-22 西安工程大学 Compact type integrated cold/hot water unit with double evaporating and cooling coil pipes and air-cooled heat pump
CN102353108B (en) * 2011-09-08 2013-08-07 西安工程大学 Evaporative cooling water chiller unit based on split heat pipe
CN102353112B (en) * 2011-11-07 2013-08-07 西安工程大学 Packing-type recirculation compact-type evaporation cooling air-conditioning unit
CN102607119B (en) * 2012-03-16 2014-04-30 西安工程大学 Solar energy/dry air energy air-water conditioning system suitable for dry areas
CN102748823B (en) * 2012-07-24 2014-07-02 西安工程大学 Modular water chilling unit integrating evaporative-cooling and air-cooled heat-pump
JP2018128230A (en) * 2017-02-10 2018-08-16 株式会社前川製作所 Assembly method of heat exchange unit
CN107327994A (en) * 2017-07-10 2017-11-07 江苏省邮电规划设计院有限责任公司 A kind of heat pipe air conditioner unit of Wind-cooling type with evaporation cooling function

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000121107A (en) * 1998-10-15 2000-04-28 Hitachi Ltd Ice storage system
CN201285124Y (en) * 2008-09-28 2009-08-05 西安工程大学 Vaporization cooling and evaporation condensing combined air-conditioning unit
CN201314651Y (en) * 2008-11-21 2009-09-23 西安工程大学 Compact evaporative cooling and mechanical refrigeration composite air conditioning unit
CN201621798U (en) * 2010-01-15 2010-11-03 西安工程大学 Cold and hot water machine set with combined evaporative type cold water machine set and air cooling heat pump cold and hot water machine set

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000121107A (en) * 1998-10-15 2000-04-28 Hitachi Ltd Ice storage system
CN201285124Y (en) * 2008-09-28 2009-08-05 西安工程大学 Vaporization cooling and evaporation condensing combined air-conditioning unit
CN201314651Y (en) * 2008-11-21 2009-09-23 西安工程大学 Compact evaporative cooling and mechanical refrigeration composite air conditioning unit
CN201621798U (en) * 2010-01-15 2010-11-03 西安工程大学 Cold and hot water machine set with combined evaporative type cold water machine set and air cooling heat pump cold and hot water machine set

Also Published As

Publication number Publication date
CN101788174A (en) 2010-07-28

Similar Documents

Publication Publication Date Title
CN102927715B (en) Multiple-on-line heat pump air-conditioning system and method for controlling multiple-on-line heat pump air-conditioning system
CN105120637B (en) Data center's evaporation cold compound cooling system of cooling water cold wind
CN102287885B (en) Double-rotating-wheel type evaporative-cooling and mechanical-refrigerating composite air-conditioner set with automatic dust-absorbing function
CN101191646B (en) Evaporation refrigerating water chilling unit
CN103292395B (en) The closed-type negative-pressure evaporative cooling handpiece Water Chilling Units of application hydrodynamic draught fan
CN201852342U (en) Wet curtain evaporative cooling air-cooled condensing unit
CN201129808Y (en) Vapor cooling and mechanical refrigeration compositing air-conditioning unit
CN205071578U (en) Compound cooling system of data disconnect -type heat pipe for computer lab - evaporative condenser
CN103776116B (en) Evaporation cools down the air-conditioning device combining with conventional refrigeration and air-conditioning method thereof
CN100417864C (en) Air conditioner system based on indirect evaporative cooling technology
CN102425822A (en) Fresh air conditioner
CN101846368B (en) Solution dehumidifying fresh air handling unit combining heat pump drive and evaporative cooling
CN205980106U (en) Seal passage of heat air conditioning system for data center that full return air dry air can combine
CN202853021U (en) Buried tube and tubular indirect and direct three-stage composite type evaporative cooling air conditioning unit
CN203657257U (en) Evaporative cooling type water chilling unit
CN105485800A (en) Natural cooling-mechanical refrigerating integrated air conditioner system for data center
CN202546965U (en) Water chilling unit capable of using vertical-type dew-point indirect three-stage evaporative cooling
CN203116210U (en) Evaporative cooling and mechanical refrigeration combined system for data machine room
CN100567834C (en) A kind of indirect transpiration-cooling type cold-wind/cold-water composite type air-conditioning unit
CN203837109U (en) Integrated and combined type machine room air conditioner unit
CN202166124U (en) Communication base station energy-saving and environment-friendly type air conditioner set
CN101975428B (en) Air-cooling type machine room air-conditioning system
CN202485130U (en) Compact type three-level evaporative cooling air conditioning unit
CN102620360B (en) Method and device for treating air at tail end of air-conditioning system
CN101629743B (en) Ceiling evaporating-cooling fresh air handling unit using porous ceramic evaporative cooler

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120627

Termination date: 20150115