Research and Design of Sealing Device in Hot Water Circulating Pump for High Temperature and High Pressure

2008 ◽  
Author(s):  
Jiegang Mu ◽  
Shuihua Zheng ◽  
Hongying Deng ◽  
Shengchang Zhang ◽  
Zhendong Cai
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Cooling System ◽  
Hot Water ◽  
Double Decker ◽  
Wide Range ◽  
Ring Seal ◽  
Research And Design ◽  
Sealing Device

Hot water circulating pump for high temperature and high pressure is important equipment applied in the wide range of industry. However, in China, the seal of this pump is not so good and could not meet the use requirements. In this paper, based on investigations of the seal for this pump in China, the main problem of the seal was found out. Also, a new sealing device of hot water circulating pump for high temperature and high pressure was designed, which was composed of floating ring seal, combined seal, packing seal and special double-decker cooling system. The experiment results show that the new design could improve the seal performance of the pump and meet the use requirements.

High Temperature and High Pressure ESP Performance Testing System Design

2013 ◽  
Vol 457-458 ◽  
pp. 423-427
Author(s):  
Xiao Qing Li ◽  
Xiao Yan Liu
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Heat Exchange ◽  
Liquid State ◽  
Constant Pressure ◽  
Hot Water ◽  
Testing System ◽  
Friction Resistance ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

With the development of oilfield exploration, the performance of electric submersible pump (ESP) has been enhanced very fast. It requires testing techniques develop at the same time. The most outstanding question is the testing of high temperature and pressure ESP. A testing well was drilled in Daqing in 1992. It keeps the water liquid state on 150 centigrade by high pressure. This system can simulate operational mode 3000 meters under the ground. But many new ESPs have been produced these years. The quondam testing system couldnt meet the testing requirement. A new testing system is desiderated eagerly. This paper developed a high temperature and pressure ESP testing experimentation system. Hydraulic/thermodynamic analysis calculation has been carried on. Friction resistance from constant pressure point to the suction inlet of hot water pump and the ESP in heating-forced cycle and experimentation primary cycle are calculated respectively. Keeping the water liquid state on 180 centigrade, constant pressure value was fixed on 2.5 MPa. The heat load is calculated including the heat that the water in the system and the equipment need and the heat loss. In order to protect ESP from emanating too much heat to keep the temperature and pressure of the system steady, heat exchange system has been designed. Cold load and heat exchange square have been calculated. Friction resistance and the size of the cold water cistern have been calculated. These provide necessary academic foundation for the testing experimentation of high temperature and pressure ESP.

The Design and Simulation of Wide Range Pressure Sensor Based on HTCC for High-Temperature Applications

2014 ◽  
Vol 609-610 ◽  
pp. 1053-1059
Author(s):  
Zhong Ren ◽  
Qiu Lin Tan ◽  
Chen Li ◽  
Tao Luo ◽  
Ting Cai ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Pressure Sensor ◽  
Simulation Analysis ◽  
Zirconia Ceramic ◽  
Passive Measurement ◽  
Series Resonance ◽  
Wide Range ◽  
Spiral Inductors ◽  
Temperature Applications

A wide range pressure sensor is designed based on the theoretical basis of LC series resonance circuit model to realize the wireless passive measurement in the harsh environment, such as high temperature and high pressure. The capacitive pressure sensitive device is devised by the technology of high-temperature co-fired ceramics (HTCC) to form nine density cavities in zirconia ceramic substrates, and thick film technology to print capacitance plates and planar spiral inductors. The theoretical calculation and simulation analysis of the designed sensor are made respectively under high pressure (10MPa) and temperature (600 °C), the results of which verify the feasibility of the design in a wide range of pressure for high-temperature applications, and provide the reliable theory basis for the fabrication of wide range pressure sensor.

scholarly journals Autoclave design for high pressure-high temperature corrosion studies

2015 ◽  
Vol 13 (4) ◽  
pp. 539-555 ◽  
Author(s):  
B.A. Lasebikan ◽  
A.R. Akisanya ◽  
W.F. Deans
Keyword(s):  
Aqueous Solution ◽  
High Pressure ◽  
High Temperature ◽  
Corrosion Behaviour ◽  
Testing Machine ◽  
Content Type ◽  
High Pressure High Temperature ◽  
Corrosion Studies ◽  
Wide Range ◽  
Design Pressure

Purpose – The purpose of this paper is to develop an autoclave that can be used to assess corrosion behaviour of suitable material in high-pressure–high-temperature (HPHT) environments. Many new discoveries of oil and gas field are in HPHT environments. The development of such fields requires appropriate selection of materials that are able to withstand not just the service loads but also corrosive production fluids in the HPHT environment. Design/methodology/approach – The exposure of material samples to elevated pressure and temperature is usually done using an autoclave. The suitability of an existing autoclave for HPHT corrosion studies is provided together with suggestions on necessary design modifications. An alternative design of the autoclave is proposed based on functionality requirements and life cycle cost assessment. Findings – It is concluded that the existing autoclave was unsuitable for HPHT corrosion tests, and modifications were very expensive to implement and/or not foolproof. A new autoclave was designed, manufactured, tested and successfully used to study the effect of aqueous solution on the corrosion of a pipe subject to a combination of axial tension, internal pressure and elevated temperature. Research limitations/implications – The maximum design pressure of 15 MPa is more than sufficient for high-pressure corrosion studies in aqueous solution where partial pressure of the dissolved gas is one of the main controlling parameters. However, the design pressure is only suitable for corrosion studies in a seawater environment of up to 1,500 m water depth. Originality/value – A new design of autoclave together with all the necessary piping, assembly and control system is proposed for HPHT corrosion studies. The autoclave can be used as standalone or integrated with a mechanical testing machine and thus enables corrosion studies under a wide range of loading.

scholarly journals A simple and low-cost chip bonding solution for high pressure, high temperature and biological applications

Lab on a Chip ◽  
2017 ◽  
Vol 17 (4) ◽  
pp. 629-634 ◽  
Author(s):  
M. Serra ◽  
I. Pereiro ◽  
A. Yamada ◽  
J.-L. Viovy ◽  
S. Descroix ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Low Cost ◽  
Biological Applications ◽  
High Pressure High Temperature ◽  
Wide Range ◽  
Materials Used

An adhesive-based strategy for the low-cost and reversible sealing of a wide range of materials used in microfluidics, requiring only the application of manually-achievable pressures.

Research and Development of a Rubber O-Ring Sealing Device for High Pressure Vessels

2013 ◽  
Author(s):  
Fan Zhou ◽  
Zhiping Chen ◽  
Haigui Fan
Keyword(s):  
High Pressure ◽  
Pressure Vessel ◽  
Axial Stress ◽  
Element Model ◽  
Pressure Vessels ◽  
Internal Diameter ◽  
High Pressure Vessel ◽  
Threaded Connections ◽  
Wide Range ◽  
Sealing Device

An O-ring made of rubber exhibits excellent sealing performance with a wide range of applications. The highest sealing pressure can be up to 400MPa. The temperature ranges from −60 °C to 200 °C and the medium is low-corrosiveness. This paper proposes an O-ring sealing device for high pressure vessels, which can be opened and operated outside a cylinder. There are no bolts bearing the axial stress under the internal pressure load, and the sealing efficiency of this device is guaranteed by the dimension chain. The whole sealing device has no threaded connections except for the oriented screw which does not bear load under the working conditions. Based on this newly developed sealing device, a high pressure vessel with the design pressure of 60 MPa and the internal diameter of 700 mm used to simulate 6000 m deep sea environment is developed and investigated. This paper firstly introduces the rationale behind the design of the sealing structure for this high pressure vessel, and then discusses a finite element model of the cylinder end for this high pressure vessel and the stress classification method which is used to evaluate the safety of the critical sections. Lastly, the paper presents a set of experimental devices and a series of experiments which were carried out. The results show that the proposed sealing structure can be used in high pressure vessels. The results also verify the assumption of triangle contact pressure distribution between the shear ring and the cylinder end. It is hoped that this study will be of interest and value to researchers when they design the similar structures in the future.

scholarly journals A framework for the technical evaluation of residential buildings’ energy retrofit

2019 ◽  
Vol 111 ◽  
pp. 03025
Author(s):  
Annamaria Belleri ◽  
Chiara Dipasquale ◽  
Jennifer Adami
Keyword(s):  
Heat Pump ◽  
Energy Efficient ◽  
Cooling System ◽  
Residential Buildings ◽  
Building Energy ◽  
Energy Performance ◽  
Hot Water ◽  
Photovoltaic System ◽  
Performance Levels ◽  
Wide Range

Despite a wide range of energy-efficient technologies, financial products and public incentives are already available, the private as well as the public sector are struggling to invest in energy efficient solutions for buildings. The primary barriers are the high initial cost and the uncertain payback period of the energy refurbishment. Allowing for different scenario testing and considering interactions among different building energy systems, building energy simulation tools can help investors overcoming such barriers by offering support to the technical planning of energy refurbishment kits through quantitative information rather than qualitative. The energy performance and comfort of three reference multifamily residential buildings typologies were evaluated considering three envelope retrofitting performance levels (high-medium-low insulated and airtight) and different heating and domestic hot water systems (heat pump, boiler, district heating). The tested envelope retrofitting performance levels allow for heating need reduction between 50% and 90% compared to the reference case. The active cooling system is not accounted for and building energy simulations outputs include thermal comfort evaluation and overheating risk assessment during the summer season. The potential of photovoltaic system combined with heat pump is evaluated in the three reference cases leading to up to 30% of load coverage.

scholarly journals A dynamic model of an innovative high-temperature solar heating and cooling system

2016 ◽  
Vol 20 (4) ◽  
pp. 1121-1133 ◽  
Author(s):  
Annamaria Buonomano ◽  
Francesco Calise ◽  
Maria Vicidomini
Keyword(s):  
High Temperature ◽  
Simulation Model ◽  
Flat Plate ◽  
Cooling System ◽  
Energy Performance ◽  
Economic Feasibility ◽  
Solar Heating ◽  
Hot Water ◽  
Solar Collectors ◽  
Heating And Cooling

In this paper a new simulation model of a novel solar heating and cooling system based on innovative high temperature flat plate evacuated solar thermal collector is presented. The system configuration includes: flat-plate evacuated solar collectors, a double-stage LiBr-H2O absorption chiller, gas-fired auxiliary heater, a closed loop cooling tower, pumps, heat exchangers, storage tanks, valves, mixers and controllers. The novelty of this study lies in the utilization of flat-plate stationary solar collectors, manufactured by TVP Solar, rather than concentrating ones (typically adopted for driving double-stage absorption chillers). Such devices show ultra-high thermal efficiencies, even at very high (about 200?C) operating temperatures, thanks to the high vacuum insulation. Aim of the paper is to analyse the energy and economic feasibility of such novel technology, by including it in a prototypal solar heating and cooling system. For this purpose, the solar heating and cooling system design and performance were analysed by means of a purposely developed dynamic simulation model, implemented in TRNSYS. A suitable case study is also presented. Here, the simulated plant is conceived for the space heating and cooling and the domestic hot water production of a small building, whose energy needs are fulfilled through a real installation (settled also for experimental purposes) built up close to Naples (South Italy). Simulation results show that the investigated system is able to reach high thermal efficiencies and very good energy performance. Finally, the economic analysis shows results comparable to those achieved through similar renewable energy systems.

scholarly journals Experimental Assessment of a Multi-Variable Control Strategy of a Micro-Cogeneration Solar-ORC Plant for Domestic Application

2021 ◽  
Vol 312 ◽  
pp. 08006
Author(s):  
Diego Vittorini ◽  
Fabio Fatigati ◽  
Davide Di Battista ◽  
Marco Di Bartolomeo ◽  
Roberto Carapellucci
Keyword(s):  
High Temperature ◽  
Flat Plate ◽  
Thermal Power ◽  
Energy Performance ◽  
Hot Water ◽  
Small Scale ◽  
Domestic Hot Water ◽  
Wide Range ◽  
Electrical Generation ◽  
Operating Points

Suitability to off-design operation, applicability to combined thermal and electrical generation in a wide range of low temperatures and pressures and compliance with safety and environmental limitations qualify small-scale Organic Rankine Cycle plants as a viable option for combined heat and power generation in the residential sector. As the plants scale down, the electric and thermal output maximization has to account for issues, spanning from high pump power absorption, compared to the electric output of the plant, to intrinsically low plant permeability induced by the expander, to the intermittent availability of thermal power, affected by the heat demand for domestic hot water (DHW) production. The present paper accounts for a flat-plate solar thermal collector array, bottomed by an ORC unit featuring a sliding vane expander and pump and flat-plate heat exchangers. A high-temperature buffer vessel stores artificially heated water – electric heaters, simulating the solar collector - and feeds either the hot water line for domestic use or the ORC evaporator, depending on the instantaneous demand (i.e., domestic hot water or electric power), the temperature conditions inside the tank and the stored mass availability. A low-temperature receiver acts like the heat sink of the ORC unit and harvests the residual thermal power, downstream the expander: a dedicated control, modelled to properly modulate the mass addition/subtraction to this storage unit allows to restore the operating points of the cycle and to limit the incidence of off-design operation, via real-time adjustment of the cycle operating parameters. Indeed, the possibility of continuous ORC generation depends on (i) the nature of the demand and (ii) the amount of hot water withdrawn from the high-temperature buffer vessel. The time-to-temperature for the mass stored inside the buffer affects the amount of ORC unit activations and eventually the maximum attainable generation of electric energy. The plant energy performance is experimentally assessed, and various characteristic operating points are mapped, based on test runs carried out on a real-scale ORC pilot unit.

scholarly journals Subcritical Water Extraction of Natural Products

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4004
Author(s):  
Yan Cheng ◽  
Fumin Xue ◽  
Shuai Yu ◽  
Shichao Du ◽  
Yu Yang
Keyword(s):  
High Pressure ◽  
Natural Products ◽  
Ionic Liquids ◽  
High Temperature ◽  
Subcritical Water ◽  
Water Extraction ◽  
Organic Modifiers ◽  
Subcritical Water Extraction ◽  
Green Extraction ◽  
Wide Range

Subcritical water refers to high-temperature and high-pressure water. A unique and useful characteristic of subcritical water is that its polarity can be dramatically decreased with increasing temperature. Therefore, subcritical water can behave similar to methanol or ethanol. This makes subcritical water a green extraction fluid used for a variety of organic species. This review focuses on the subcritical water extraction (SBWE) of natural products. The extracted materials include medicinal and seasoning herbs, vegetables, fruits, food by-products, algae, shrubs, tea leaves, grains, and seeds. A wide range of natural products such as alkaloids, carbohydrates, essential oil, flavonoids, glycosides, lignans, organic acids, polyphenolics, quinones, steroids, and terpenes have been extracted using subcritical water. Various SBWE systems and their advantages and drawbacks have also been discussed in this review. In addition, we have reviewed co-solvents including ethanol, methanol, salts, and ionic liquids used to assist SBWE. Other extraction techniques such as microwave and sonication combined with SBWE are also covered in this review. It is very clear that temperature has the most significant effect on SBWE efficiency, and thus, it can be optimized. The optimal temperature ranges from 130 to 240 °C for extracting the natural products mentioned above. This review can help readers learn more about the SBWE technology, especially for readers with an interest in the field of green extraction of natural products. The major advantage of SBWE of natural products is that water is nontoxic, and therefore, it is more suitable for the extraction of herbs, vegetables, and fruits. Another advantage is that no liquid waste disposal is required after SBWE. Compared with organic solvents, subcritical water not only has advantages in ecology, economy, and safety, but also its density, ion product, and dielectric constant can be adjusted by temperature. These tunable properties allow subcritical water to carry out class selective extractions such as extracting polar compounds at lower temperatures and less polar ingredients at higher temperatures. SBWE can mimic the traditional herbal decoction for preparing herbal medication and with higher extraction efficiency. Since SBWE employs high-temperature and high-pressure, great caution is needed for safe operation. Another challenge for application of SBWE is potential organic degradation under high temperature conditions. We highly recommend conducting analyte stability checks when carrying out SBWE. For analytes with poor SBWE efficiency, a small number of organic modifiers such as ethanol, surfactants, or ionic liquids may be added.

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