scholarly journals Developing a new energy-saving, photosynthesis-promoting environmental control system for greenhouse production based on a heat pump with a heat storage system

2013 ◽  
Vol 69 (2) ◽  
pp. 81-92 ◽  
Author(s):  
Yasunaga IWASAKI ◽  
Masaki AIZAWA ◽  
Chie YOSHIDA ◽  
Masuyuki TAKAICHI
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Heat Pump ◽  
Heat Storage ◽  
Environmental Control ◽  
Storage System ◽  
Greenhouse Production ◽  
New Energy

scholarly journals Development and installation of control system for a test rig interconnecting a micro Gas Turbine, a Heat Pump and a PCM Storage system

2019 ◽  
Vol 113 ◽  
pp. 01003
Author(s):  
Iacopo Rossi ◽  
Romain Caillere
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Heat Pump ◽  
Storage System ◽  
Electrical Energy ◽  
Operating Conditions ◽  
Lower Amount ◽  
Test Bed ◽  
Micro Gas Turbine ◽  
Electrical Energy Production

The need to enhance flexibility on current power plant is linked to the strong penetration of non-dispatchable sources in the current energy network, which causes a dramatic need for ancillary services to sustain the grid operability. A framework including a micro Gas Turbine (mGT), a Heat Pump (HP) and a PCM Storage is considered to enhance plant flexibility while facing grid and price fluctuations during day operations. The system so composed is devoted to electrical energy production only. A proper use of the HP allows, for instance, to heat up the compressor intake temperature whilst the system is operating at minimum load. The system can then produce a lower amount of energy in order to be more competitive in the infra-day energy market. At the same time, the cold storage is charged and the stored energy can be later used to power up the system during the peak hours by cooling the compressor intake. This work presents then the installation of the control system devoted to the management and the control of such complex system. The test-bed is defined to test different operating conditions and to validate the operating framework of the whole compound.

Study on Key Techniques of Control System for Dry-Mixed Mortar Production Line

2011 ◽  
Vol 71-78 ◽  
pp. 4184-4187
Author(s):  
Huan Zhang
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Production Line ◽  
Raw Material ◽  
Level Of Automation ◽  
Technology Process ◽  
New Energy ◽  
Mixed Mortar ◽  
Key Techniques ◽  
And Control

As a new energy-saving and environmental protection building material, dry-mixed mortar has been promoting actively in China. The key techniques of control system for dry-mixed mortar production line were introduced in this paper, which was mainly based on PLC and smart weighing instrumentation. Firstly, the technology process and control demands were presented. Secondly, control system configuration, control strategy were proposed in detail. Finally, the key intelligent adjust algorithms were described as well. The practical operation verifies that the control system is highly reliable and stable, and it greatly enhances the level of automation and weighing accuracy of the raw material and meets the equipments requirements of energy-saving and green running.

Research on Control System of Energy-Saving Greenhouse

2013 ◽  
Vol 448-453 ◽  
pp. 1312-1315
Author(s):  
Qun Li
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Humidity Sensor ◽  
Environmental Parameters ◽  
Single Chip ◽  
Greenhouse Production ◽  
Temperature And Humidity ◽  
Digital Temperature Sensor ◽  
The Cost ◽  
Energy Intensive Industries

Energy-saving and environmental protection has become the theme of the 21st century. Greenhouse is an energy-intensive industries. Every year, 35% of energy consumption on agricultural production is used for greenhouse heating in the world, which accounts for 15-40% of the cost of greenhouse production. For improving energy efficiency and protecting the environment, the reasonable control of greenhouse environmental parameters is significant. The design of solar greenhouse real-time environment monitoring and automatic control system is based on 8051 single-chip in the thesis. The temperature and humidity signal are obtained from DS18B20 digital temperature sensor and IH3605 humidity sensor. When the greenhouse temperature exceeds the set temperature, the device can be started by perform timely processing, then the user can read LED digital display temperature and humidity values.

Energy Regulation Based Close-Loop Variable-Speed Valve-Controlled-Motor System

2011 ◽  
Vol 328-330 ◽  
pp. 1904-1907
Author(s):  
Ming Xu ◽  
Bo Jin
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Motor System ◽  
Safety Valve ◽  
Energy Regulation ◽  
Variable Speed ◽  
Throttle Valve ◽  
New Energy ◽  
Valve Control ◽  
Loop Scheme

A new energy-saving method with an energy regulation device (ERD) is presented. The ERD is composed of an accumulator, a proportional throttle valve and a safety valve. Due to the addition of the proportional throttle valve, the ERD becomes a flow-controllable element. It can adjust energy according to the system demand. The principle of energy regulation based close-loop variable-speed valve-controlled-motor is discussed in detail. And it can be conclude that the proposed close-loop scheme can gain a good response as the valve control system while the power is less obviously.

scholarly journals Seasonal Performance of a Combined Solar, Heat Pump and Latent Heat Storage System

2014 ◽  
Vol 48 ◽  
pp. 689-700 ◽  
Author(s):  
Christian Winteler ◽  
Ralf Dott ◽  
Thomas Afjei ◽  
Bernd Hafner
Keyword(s):  
Latent Heat ◽  
Heat Pump ◽  
Heat Storage ◽  
Storage System ◽  
Latent Heat Storage ◽  
Solar Heat ◽  
Seasonal Performance

scholarly journals Optimization-Based Control Concept with Feed-in and Demand Peak Shaving for a PV Battery Heat Pump Heat Storage System

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2098 ◽  
Author(s):  
Ronny Gelleschus ◽  
Michael Böttiger ◽  
Thilo Bocklisch
Keyword(s):  
Model Predictive Control ◽  
Heat Pump ◽  
Predictive Control ◽  
Degrees Of Freedom ◽  
Heat Storage ◽  
Storage System ◽  
Energy Storage System ◽  
Electricity Sector ◽  
Storage Device ◽  
Flexibility Options

The increasing share of renewable energies in the electricity sector promotes a more decentralized energy supply and the introduction of new flexibility options. These flexibility options provide degrees of freedom that should be used optimally. Therefore, in this paper, a model predictive control-based multi-objective optimizing energy management concept for a hybrid energy storage system, consisting of a photovoltaics (PV) plant, a battery, and a combined heat pump/heat storage device is presented. The concept’s objectives are minimal operation costs and reducing the power exchanged with the electrical grid while ensuring user comfort. In order to prove the concept to be viable and its objectives being fulfilled, investigations based on simulations of one year of operation have been carried out. Comparisons to a simple rule-based strategy and the same model predictive control scheme with ideal forecasts prove the concept’s viability while showing improvement potential in the treatment of nonlinear system behavior, caused by nonlinear battery losses, and of forecast uncertainties.

Dynamic suboptimal control of a heat pump/heat storage system

2007 ◽  
Vol 9 (4) ◽  
pp. 341-355 ◽  
Author(s):  
M. Zaheeruddin ◽  
V. G. Gourishankar ◽  
R. E. Rink
Keyword(s):  
Heat Pump ◽  
Heat Storage ◽  
Storage System ◽  
Suboptimal Control

Design and Application of a Seasonal Solar Soil Heat Storage System Applied in Greenhouse Heating

2014 ◽  
Vol 672-674 ◽  
pp. 21-25
Author(s):  
Liang Zhang ◽  
Peng Xu ◽  
Jia Chen Mao ◽  
Xu Tang
Keyword(s):  
Solar Energy ◽  
Energy Saving ◽  
Air Temperature ◽  
Indoor Air ◽  
Solar Collector ◽  
Heat Storage ◽  
Storage System ◽  
Control Subsystem ◽  
And Control ◽  
Design And Application

A seasonal solar soil heat storage (SSSHS) system applied in greenhouse heating has been designed and introduced. The system consists of solar collector subsystem, soil heat storage subsystem, greenhouse heating subsystem, hydronic subsystem and control subsystem. By applying soil heat storage, solar energy stored in the soil under the greenhouse can be transferred and utilized in winter to realize the utilization of cross-seasonal energy. TRNSYS is used to simulate the process and effect in the system of the solar energy collection and soil heat storage in Shanghai, and the simulation is calibrated to improve the precision of the TRNSYS model. When the indoor air temperature of the greenhouse is kept at 12°C throughout the year, the energy saving by using the SSSHS system in Shanghai can be 46.2kWh/(m2∙year).

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