Reclaiming heat from water chiller system with heatpump system to produce hot waterWISIT CHUPRASERT1 and CHITTIN TANGTHIENG21'2Department of Mechanical Engineering, Faculty of Engineering, Chulalongkorn UniversityAe.chup@hotmail.com, QED690@yahoo.comABSTRACTNowadays energy and environmental crisis are a major concern for all parts of society.One of the solutions to solve this crisis is to use energy efficiently, especially by using a wasteheat recovery system. Most office buildings use chillers for cooling whereas the waste heat isobtained as a by-product which can be used in the recovery system to generate hot water.This paper is the study of the improvement of energy efficient usage by using thewaste heat recovery system on the chiller used for an air-conditioning unit with heat pump togenerate hot water. This will be performed by collecting data from the experiment conductedby varying the water flow rate as the effect on hot water production. In addition, these resultscan be applied to other office buildings as a guideline for a preliminary study and designbefore introducing an actual implementation to reduce energy consumption of the hot watergenerating system.The results show that the temperature of produced hot water depends on the waterflow rate. When the water flow rate decreases, temperature of hot water and power of heatpump compressor increase. On the other hand, the hot water temperature and powerconsumptions of heat pump compressor decrease, when the water flow rate is increased. Thecoefficient of performance (COP) of the chiller with the waste heat recovery system isapproximately 3.60 and the coefficient of performance (COP) of the heat pump increasedfrom 5.01 to 6.39, 6.77, 7.21, 7.56 and 7.66 (27.5%, 35.1%, 43.9%, 50.9% and 52.9%) atwater flow rate of 4, 6, 8, 10, 10 and 15.5 liters per minute respectively.KEYWORDSHeat pump water chiller, hot, heat, waste energy research magazine recovery50 volume 9 year 2555 (2012)/2.Figure 1 a I yenbaepat Ta systemChapter I. naThe system Ta cool Uncle for use in air conditioning (Chiller system) into narabop that are widely used in the building industry.The building can area agency hospital. Who says there is a need both to maintain an internal climate.The building and the energy required to produce a creative ร้ teaching for use in laundry or other goods to พร้. Om, which generallyTa systems cooling cooling has been left to the atmosphere. The heat were the secret alloy used to produce.Uncle ร้ ondai [1, 3, 6, 7], but it may loop onchan ร้ inadequate for producing creative ร้. Onhai high temperature as needed.So, in this research study is to use vaseline, ร้. Onploi from the system are cool uncle in conjunction with using the heater pump.Produce more heat for use in various activities within the above categories, building into the guidelines again, helping to reduce energy consumption in.To produce more heat. Figure 1 shows a transfer ร้ onthi ร้-derived from the exposed. Onpha, both air conditioned and electric are used.In developing it, which would leave the heat obtained leave to the condenser area.The report analyzed the system energy consumption in ร้ of Naga. Onploi disposal of centralized air conditioning systemBack of the building can work more in Italy, mostly. Nawela 1 year Luigi [7] found that can use ร้ in onploi.100% hot Uncle productions in the last month has gotten hot and 70% in the last month, and can produce more heat at temperature of 40° C,7° C temperatures cool and creative atmosphere, temperature, 35° C.Demo [4] studied ร้ creative production system. Onduai pump, heater system in conjunction with the Club of ร้ onploi from air-conditioning system.Back to JavaScript using a mathematical model, which has long proposed for commercial buildings, farming regions of ศร้ check box. Onchuen ofIn Thai, which has 115 rooms, big selection, Tamar, which is painted a cool Uncle system consists of a 257 kW use santha cooling.R-134 a swim heater system and nasantha pump size 25.7 kW use santha R-134a cool as well. I found that the system can produce.More hot temperature. The average for the whole year is equal to 44.7.oC thongni onthi ร้ creative production of temperature depends on the load of cold cream.Tana cool uncle and uncle RonSun nan Chai restaurant [5] have been created and evaluated the performance of the underlying instruments are for creative ร้. Ondoi use the heater pump can be used in.Housing size 3-4 person hot Uncle tank 100 litres in size that used mostly R-22 santha nasantha cooling cooling compressors.I have a 1.4 kW size size equal to 3.5 kW cooling and condenser with creative onthi ร้ 4.5 kW was produced there.The average temperature o 50.5C somrarot-ธิ์ sathi samap! 3.3 pump heater's layi restaurant but the price of a TA onduai ร้ Uncle heater pump is higher than the machine.CoolingLoadRejectedHeatAmbientExpansion ValveEvaporator CondenserCompressor PowerIn putRefrigerated Space energy research Magazine Vol. 9 issue 2 2555 (2012)/51.Tana onduai ร้ much more electrical from expense estimates that the total cost of the onthi ร้ ร้ more memory onto production at 1.2.Baht/MJ (electricity meter 3.0 baht)Pramote late invention [2] Study of the system with a pump heater hot Uncle Ta pellets either by santha R-134a cooling using air compressor.342 W size steam heat transfer can be a maximum of approximately 1.2 kW and higher temperatures, more in approximately 1 minute.From here take the situation of the system. For maximum heat 3.5 kW, compared with a ร้ Uncle onfaifa are found.Using the air compressor and large size 2.6 1.1 kW kW ball mill by means of the system, the performance rights act samap sadu sangu, about 4-4.2 and Tana ร้ Uncle The maximum temperature of 41.7 ondai oA C flow rate of 3 liters per minute more and more into the system temperature.25oCThe purpose of this research article re Bulletin education process to optimize the use of energy by means of Naga.Heat release from the system to use the system in conjunction with the cool Uncle heater pump to produce more heat. By means of observation experiment from the experiment.To evaluate the ability of producing creative and learn the behaviour of Ta ta to use pump heater cool and creative?Preliminary data, mostly in the design, development, and improve the system.II. experimental set that is used in research.In this research, he created the system, producing more heat by thermal disposal together with the release of Naga is used mostly to pump heater. In natonStudies have mostly only alter na. Nokon housing units-den of HVAC systems separate types which contain.An air compressor and condenser system consists of a pump, heater, together with Panama. The details of the device, as shown in the test series.Table 1Equipment in experimental series. Technical data Equipment in experimental series. Technical dataThe system is also painted in yellow green.-Compressors Rotary type steam 5.396 kWPump heater system.-Air compressor I sakhlo type 2.1 kW-Heat exchange equipment The type plate Phonthi heat exchanger1.4 m²-Heat exchange equipment The type plate Phonthi heat exchanger2.0 m²-Condenser Cooling type Lookin
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