Energy Efficiency Analysis of Piston Type Air Compressor

2014 ◽  
Vol 981 ◽  
pp. 769-773
Author(s):  
Su Lu Zheng ◽  
Yun Yan Mao ◽  
Xiang Ping Wang ◽  
Zhi Yun Zheng ◽  
Shen Xi He ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Rotational Speed ◽  
Exhaust Valve ◽  
Valve Lift ◽  
Optimal Conditions ◽  
Intake Valve ◽  
Air Compressor ◽  
Relationship Of ◽  
The Relationship ◽  
Energy Efficiency Analysis

In the paper,the relationship of the energy efficiency and its impact factor such as intake valve lift ,exhaust valve lift, clearance volume and rotational speed has been researched and the optimal conditions of the air compressor running was found . By adjusting the parameters of intake valve lift, exhaust valve lift, clearance volume and rotational speed, the total energy of a W-1.6/5 compressor could be reduced by 10.9%.

Design and Dynamic Analysis of an Innovative Axial Shift Valvetrain System (ASVS) for Variable Stroke Engine

2021 ◽  
pp. 146808742110653
Author(s):  
Jingchen Cui ◽  
Liping Chen ◽  
Wuqiang Long ◽  
Xiangyu Meng ◽  
Bo Li ◽  
...  
Keyword(s):  
Contact Force ◽  
Engine Speed ◽  
Exhaust Valve ◽  
Valve Lift ◽  
Intake Valve ◽  
Power Performance ◽  
Working Cycle ◽  
Valve Motion ◽  
Axial Shift ◽  
Stroke Engine

A variable valvetrain system is the key part of the variable stroke engine (VSE), which could achieve higher power performance and low-speed torque. An innovative axial shift valvetrain system (ASVS) was put forward to meet the air-charging requirements of a 2/4-stroke engine and complete a changeover within one working cycle. Two sets of intake and exhaust cam profiles for both intake and exhaust sides in the 2/4-stoke mode were designed for 2/4-stoke modes. Furthermore, a simulation model based on ADAMS was established to evaluate the dynamic valve motion and the contact force at different engine speeds. The dynamic simulation results show that the valve motion characteristics meet the challenges at the target engine speed of 3000 r/min. In two-stroke mode, the maximum intake valve lift could achieve 7.3 mm within 78°CaA, and the maximum exhaust valve lift could achieve 7.5 within 82°CaA on the exhaust side. In four-stroke mode, the maximum intake valve lift can achieve 8.8 mm within 140°CaA, and the maximum exhaust valve lift can achieve 8.4 mm within 140°CaA. The valve seating speeds are less than 0.3 m/s in both modes, and the fullness coefficients are more than 0.5 and 0.6 in the 2-stroke and 4-stroke mode, respectively. At the engine speed of 3000 r/min, the contact force on each component is acceptable, and the stress between cam and roller can meet the material requirement.

scholarly journals Influence of EEDI (Energy Efficiency Design Index) on Ship–Engine–Propeller Matching

2019 ◽  
Vol 7 (12) ◽  
pp. 425 ◽  
Author(s):  
Ren ◽  
Ding ◽  
Sui
Keyword(s):  
Energy Efficiency ◽  
Co2 Emission ◽  
Greenhouse Gas Emission ◽  
Propulsion System ◽  
Matching Theory ◽  
Matching Process ◽  
Marine Diesel ◽  
Energy Efficiency Design Index ◽  
Relationship Of ◽  
The Relationship

With the increasingly strict international GHG (greenhouse gas) emission regulations, higher requirements are placed on the propulsion system design of conventional ships. Playing an important role in ship design, construction and operation, ship–engine–propeller matching dominantly covers the CO2 emission of the entire ship. In this paper, firstly, a ship propulsion system matching platform based on the ship–engine–propeller matching principle and its application on WinGD 5 × 52 marine diesel engine have been investigated. Meeting the energy efficiency design index (EEDI) regulation used to calculate the ship CO2 emission is essential and ship–engine–propeller matching has to be carried out with EEDI into consideration. Consequently, a procedure is developed combining the system matching theory and EEDI calculation, which can provide the matching results as well as the corresponding EEDI value to study the relationship between EEDI and ship–engine–propeller matching. Furthermore, a comprehensive analysis is performed to obtain the relationship of EEDI and system matching parameters, such as ship speed, effective power and propeller diameter, reflecting the trend and extent of EEDI when changing these three parameters. The results of system matching parameters satisfying different EEDI phases indicate the initial value selection in matching process to provide reference for the design of ship, engine and propeller under the EEDI regulations.

scholarly journals CONCEPTED QUALITY CATEGORY IN THE CONCEPT OF SMART CITIES AND SUPPLY CHAINS

2020 ◽  
Author(s):  
N. Ostrovskaya ◽  
◽  
S. Barykin ◽  
K. Borodina ◽  
◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Quality Management ◽  
Energy Conservation ◽  
Smart City ◽  
Smart Cities ◽  
Quality And Safety ◽  
Energy Services ◽  
Quality Category ◽  
Relationship Of ◽  
The Relationship

In the article, the authors consider the main provisions of the concept of «quality». Make a connection between quality and safety, which is important for smart city projects and energy conservation. The article discusses the relationship of quality management with energy conservation, energy efficiency and energy services

Using turbidity and particle counts to monitor Cryptosporidium removals by filters

2002 ◽  
Vol 2 (3) ◽  
pp. 65-71 ◽  
Author(s):  
P.M. Huck ◽  
B.M. Coffey ◽  
W.B. Anderson ◽  
M.B. Emelko ◽  
D.D. Maurizio ◽  
...  
Keyword(s):  
Cryptosporidium Parvum ◽  
Operating Conditions ◽  
Optimal Conditions ◽  
Optimal Operating ◽  
Filter Performance ◽  
Particle Counts ◽  
Pre Treatment ◽  
Relationship Of ◽  
The Relationship ◽  
Filter Cycle

Physicochemical removal of protozoan pathogens is receiving increased attention because of the difficulty of chemically inactivating these organisms, particularly Cryptosporidium parvum. Most studies that have examined the removal of these and other pathogens by filtration have been conducted under steady-state conditions with optimized pre-treatment. The research on which this paper is based evaluated the removal of Cryptosporidium and surrogates at various points in the filter cycle and under non-optimal conditions, at several pilot plants. The focus of this paper is on the relationship between removals of Cryptosporidium, and turbidity and particle counts. Under stable or optimal operating conditions all pilot plants produced similar low filter effluent turbidity and particle counts. Average Cryptosporidium removal varied among locations, however, by more than two log units. Cryptosporidium removal was impaired under all of the non-optimal conditions. Particle and turbidity performance was also worse, but the relationship of these parameters to Cryptosporidium removal varied. Particle counts show greater promise than turbidity as a tool to monitor filter performance in real time for possible deterioration in Cryptosporidium removal capability.

scholarly journals Furnace ecology

2018 ◽  
pp. 50-57
Author(s):  
S. L. Rovin ◽  
L. E. Rovin ◽  
L. N. Rusaya ◽  
O. V. Gerasimova
Keyword(s):  
Energy Efficiency ◽  
Complex Systems ◽  
High Efficiency ◽  
Environmental Parameters ◽  
Gas Purification ◽  
Minimal Energy ◽  
Gas Cleaning ◽  
Relationship Of ◽  
The Relationship

The article studies the issues of dust and gas cleaning of emissions from smelting units, the analysis of the relationship of furnaces energy efficiency and their environmental parameters, the complex systems that insure high efficiency of gas purification which are aspirated from the melting units are provided, with minimal energy and investment costs.

Mixing Effect and Energy Efficiency Analysis for Different Lances in Steel Converter Process

2011 ◽  
Vol 317-319 ◽  
pp. 1462-1473
Author(s):  
Dong Xu ◽  
Da Qiang Cang ◽  
Li Xue Qin ◽  
Jian Feng Duan
Keyword(s):  
Energy Efficiency ◽  
Gas Flow ◽  
Mixing Time ◽  
Energy Utilization ◽  
Lance Height ◽  
Utilization Factor ◽  
Mixing Effect ◽  
Steel Converter ◽  
Relationship Of ◽  
The Relationship

The mixing effect in steel converter process is very important to the fluid flow and mass transfer in bath and directly affects the chemical reaction and temperature homogeneity in the industry steel process. The cold model was employed to research the relationship of mixing time, agitation power, lance type, operation parameters, bath shape et al. According to the results, the mixing time of the bath decreases with larger gas flow rate and bigger diameter of the bath. Increasing the nozzle inclination properly is benefit for decreasing the mixing time and improving the agitation of the bath. The relationship of mixing time and lance height is complicated, because the mixing time is fluctuant by the lance rising. By introduce the relative energy utilization factor, the agitation power utilization was analyzed and compared under different conditions. The energy efficiency is higher with larger nozzle inclination as well as the bigger ratio of diameter and depth of the bath.

Study on Room Air Conditioner Dehumidification Capacity

2013 ◽  
Vol 448-453 ◽  
pp. 3386-3391
Author(s):  
Qian Wang ◽  
Qing Lin Meng
Keyword(s):  
Energy Efficiency ◽  
Water Flow ◽  
Flow Rate ◽  
Calculation Method ◽  
Water Flow Rate ◽  
Air Conditioner ◽  
Efficiency Ratio ◽  
Single Room ◽  
Relationship Of ◽  
The Relationship

Room air conditioner is widely used in a single room or other enclosed spaces to increase the comfort of the environment. It adjusts the temperature and humidity to maintain the comfort for humans; dehumidification is a very important function of room air conditioner. This paper demonstrated the relationship among dehumidification capacity, entering air parameters, and evaporative temperature, presented the calculation method of maximum condensate water flow rate in certain condition, discussed the interaction of energy efficiency ratio and dehumidification capacity, and gave the relationship of condensate water flow rate and evaporative temperature using a specific compressor model. It is suggested that a balance should be made between dehumidification capacity and energy efficiency ratio for room air conditioner operating requirement.

scholarly journals Renewable energy innovation in Europe: Energy efficiency analysis

2021 ◽  
Vol 234 ◽  
pp. 00021 ◽  
Author(s):  
Svitlana Kolosok ◽  
Iuliia Myroshnychenko ◽  
Halyna Mishenina ◽  
Inessa Yarova
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Efficiency Analysis ◽  
Energy Productivity ◽  
Regulatory Policies ◽  
Fiscal Incentives ◽  
Energy Innovation ◽  
The Relationship ◽  
Efficiency Indicators ◽  
Energy Efficiency Analysis

In this manuscript, we investigate the importance of renewable energy innovation for achieving inclusive and sustainable goals and the state’s energy security. Emphases in research are made on investigation the effect of regulatory policies and fiscal incentives on achieving renewable energy targets. Exploiting energy data for 28 European countries over the period 1990–2018, we assess the relationship between the volumes of renewable energy and energy efficiency. The statistical analysis we performed in Python. Our results indicate that the share of energy from renewable positively correlates with all energy efficiency indicators except energy productivity.

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