• Title, Summary, Keyword: Pump system

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Energy Consumption Evaluation in Pumping System with Different Building Characteristics (건물 특성에 따른 냉수 순환 펌핑 시스템 별 에너지 소모량 분석)

  • Shin, Dong-Shin;Park, Sung-Bin;Jun, Tae-Ik;Ma, Kang-Il;Kim, Tae-Hong;Lee, Sung-Goo
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.28 no.6
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    • pp.242-247
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    • 2016
  • This study analyzed the energy consumption of a building pump system that was originally equipped with a primary-secondary zone pump system. Using the HYSYS program the energy consumption of the primary pump system was compared with the primary-secondary zone pump system. The primary-secondary zone pump system consumes less energy than the originally designed primary pump system. When the distance between the machine room and each building is assumed to be equal, the primary pump system can be more efficient than the primary-secondary zone pump system with decreasing the distance. When the distance is 120 m, the primary system consumes less total annual energy than the primary-secondary zone pump system and saves 2,773 kWh. The suggested energy evaluation program can be useful if the designer seeks a more efficient pump system.

Study of industrial water calculation improvement by use Alternative Energy (대체에너지 사용시 공업용수 순환 개선을 위한 연구)

  • Choi, Do-Sun
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.4 no.4
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    • pp.307-310
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    • 2011
  • In this paper we use general centrifugal pump instead of screw pump in alternative Energy system. This alternative Energy system with screw pump compared the volume flour of water pumping and efficiency. Screw pump is designed that it rotated without a toque in another Shaft. Futhermore it have noise and abrasion, The pump used in high pressure with fast rotate.

A Study on the Performance Characteristic of Common Rail High Pressure Pump (커먼레일 시스템용 고압펌프의 성능 특성에 관한 연구)

  • Lee, Choon-Tae
    • Journal of Power System Engineering
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    • v.17 no.6
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    • pp.5-10
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    • 2013
  • Diesel engines have the advantages of good fuel efficiency and low emissions. Therefore, car makers have been developed various kinds of diesel engine management system to clean up emissions while improving fuel efficiency. One of them is the common rail system. In the common rail system, diesel fuel is injected into the combustion chamber at ultra high pressures up to 1,800 bar to ensure more complete combustion for cleaner exhaust gas, and highly precise multiple injection reduces NOx emission, combustion noise and vibration. Generally speaking, common rail system consists of booster pump, high pressure pump, common rail, injectors, control valves, and sensors. The high pressure pump receives low pressure fuel from the booster pump and supply high pressure fuel to injectors through the high pressure common injection rail. Therefore, high pressure pump has an important role in common rail system. In this paper, we have investigated the performance of high pressure pump of common rail system.

Multi type heat pump system computer simulation and experimental verification (멀티형 히트펌프 시스템 컴퓨터 시뮬레이션과 실험적 검증)

  • 한도영;정민영
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.12 no.1
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    • pp.12-19
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    • 2000
  • The multi type heat pump system may provide more energy savings and better environmental conditions than the single type heat pump system may do. In order to design a multi type heat pump system, it may be recommended to develop the system simulation program, which can predict the characteristics of the system such as unit capacities, power consumptions, and system COP's. In this study, the steady state simulation program of the multi type heat pump system was developed. The results from the simulation program were compared with those from the experimental tests which were performed in the environmental chamber, Cooling tests show 3.11% and 0.94% of error in capacity and COP, and heating tests show 3.30% and 1.90% of error in capacity and COP, respectively. Therefore, the steady state simulation program developed for this study can effectively be used for the design and the performance prediction of the multi type heat pump system.

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Performance analysis of dual source heat pump system with single unit dual source evaporator (SUDS증발기를 사용한 2중열원 열펌프의 성능해석)

  • 우정선;이세균;이재효;박효순
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.11 no.3
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    • pp.391-400
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    • 1999
  • The efficiency and capacity of an air source heat pump system decrease as the ambient temperature drops. One strategy of avoiding the decrease of the efficiency and capacity in air source heat pump system is to switch to another thermal energy source. Water can be a good candidate for the heat source. This paper presents the results of the performance analysis of heat pump system with a single unit dual source(SUDS) evaporator The heat exchanger combines two separated evaporators into a single evaporator and the object of the SUDS evaporator is to recover energy from dual heat sources, i.e. air and water. Simulation program is developed for the dual source heat pump system with a SUDS evaporator and experimental data are obtained and compared with the simulation results. Differences in heating capacity and COP are 7% and 8% respectively. Simulation results are in good agreement with the test results. Therefore, the developed program is effectively used for the design and performance prediction of the dual source heat pump system with a SUDS evaporator.

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Performance Test for High Efficient Heat Pump System using Seawater Heat Source and Exhaust Energy (해수열원 및 폐열이용 고성능 열펌프 시스템 성능실험)

  • 최광일;오종택;오후규
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.15 no.12
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    • pp.979-986
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    • 2003
  • The performance characteristics of heating and cooling operation for a heat pump system using seawater heat source and exhaust energy are presented. The heat pump system is made of a waste heat recovery system and a vapor compression refrigeration system. The working fluid is R-22. The heat pump system COPs are measured during heating and cooling operation modes, and the resultant COPs were 9.7 and 7.9, respectively, which are three times higher than those of the heat pump itself. Therefore, the performance of the heat pump system using exhaust energy is excellent compared to that of a general heat pump. The experimental data can be effectively used for the design of the high efficient heat pump using a seawater heat source.

A Hydraulic-Oil Pump System using SR Drive with a Direct Torque Control Scheme

  • Lee, Dong-Hee;Kim, Tae-Hyoung;Ahn, Jin-Woo
    • Journal of Power Electronics
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    • v.9 no.3
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    • pp.491-498
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    • 2009
  • The hydraulic-oil pump is widely used for building machinery, brake systems of vehicles and automatic control systems due to its high dynamic force and smooth linear force control performance. This paper presents a novel direct instantaneous pressure control of the hydraulic pump system with SRM drive. The proposed hydraulic pump system embeds the pressure controller and direct instantaneous torque controller. Due to the proportional relationship between pump pressure and torque, pressure can be controlled by the motor torque directly. The proposed direct torque controller can reduce inherent torque ripple of SRM, and develop a smooth torque, which can increase the stability of the hydraulic pump. The proposed hydraulic pump system has also fast step response and load response. The proposed hydraulic pump system is verified by computer simulation and experimental results.

Evaluation of Energy Savings for Inverter Driving Centrifugal Pump with Duty Cycles (인버터 구동 원심펌프의 급수 사용율에 따른 에너지 절감 평가)

  • Kim, Kyungwuk;Suh, Sang-Ho;Rakibuzzaman, Rakibuzzaman
    • The KSFM Journal of Fluid Machinery
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    • v.18 no.6
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    • pp.81-85
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    • 2015
  • The purpose of this study is to evaluate energy savings for inverter driving multi-stage centrifugal pump. Variable speed driving pump system has high efficiency compared with constant speed driving pump system. Because of difficulty to estimate operating efficiency of variable speed driving pump system, energy saving rates are used to replace operating efficiency. energy saving rates are calculated from pump input power and pump duty cycle. But another researches have used pump duty cycles of each season for energy saving rate. In this study, for estimating energy saving rate more high accuracy, pump duty cycles are measured for 1 year. pump duty cycles, depending on the season and be classified according to the weekday/weekend or during the week day. By this pump duty cycles, Energy saving rate is calculated appropriately.

Comparative Characteristic Analysis of a Hydraulic Control System Using a Speed Controlled Hydraulic Pump (유압펌프 회전속도 제어방식 유압제어시스템의 특성 비교 분석)

  • Jeong, H.S.;Jeong, S.W.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.7 no.3
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    • pp.13-19
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    • 2010
  • Hydraulic systems are widely used as a power transfer and/or power control system due to its flexibility, controllability, accuracy and high power density. Valve controlled and/or pump capacity controlled systems are normally adopted as a control device, but nowadays pump speed controlled systems are emerging as a new energy-efficient hydraulic control system. In this paper the pump speed controlled system for the cylinder position control of a counter balance circuit is investigated by simulation study and position control experiments were carried out. As a result, the possibility and efficiency of the pump speed controlled system were verified.

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A Soft Actuation System with Origami Pump for Maximizing Haptic Feedback (햅틱 피드백 극대화를 위한 오리가미 펌프 기반의 소프트 구동기 시스템)

  • Jung, Pyeong-Gook;Jang, Hyukjoon;Cha, Youngsu
    • The Journal of Korea Robotics Society
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    • v.16 no.1
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    • pp.29-34
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    • 2021
  • Traditional actuation system such as electric and pneumatic actuator has obvious advantages and disadvantages. To combine advantages and compensate disadvantages of the traditional actuation, a pneumatic actuation system with an internal air pressure source is noteworthy approach. In this paper, a soft pneumatic actuation system based on origami pump is described for haptic feedback glove. To improve wearability, an origami pump is introduced because the origami pump is much lighter than air compressor. The miniaturized electric actuation system is also designed with 3D printed planetary gear in order to reduce the volume of the system. To figure out the performance of the system, shrinkage distance of origami pump was measured with vision camera. The pressure in the origami pump was also estimated to understand the performance of the system.