Technical Terms
Energy Consumption Itemized Measurement, Energy Management Status With the rapid development of the national economy, the people's living standards continue to improve, the demand for all types of energy consumption also continues to increase to the energy supply has brought great pressure.
Chinese Name
Energy Consumption Itemized Measurement
Discipline
Energy Science
Purpose
Energy Consumption Management
Category
Scientific and Technical Terminology
Status Quo of Energy ManagementEnergy Consumption Itemized Measurement System PolicySystem Design IdeaMain Functions of SoftwareThe TA Says
Status quo of energy management
Looking at the whole situation of energy consumption in comparison, large and medium-sized buildings are large energy-consuming; for this reason, the national requirements for energy conservation in buildings to reduce energy consumption is also increasingly high, the relevant policies and regulations came into being.
According to statistics, the building's energy consumption is mainly in air conditioning, lighting, hot water supply and other power equipment; according to the authoritative energy consumption survey report shows that, in China, the building envelope of the cooling and heat loss and ventilation and air conditioning system equipment energy consumption accounted for more than 50% of the energy consumption of lighting and power systems accounted for more than 30% of the energy consumption (the proportion of energy consumption of various buildings in the following table); the building energy-consuming project energy consumption use energy consumption Proportion of central air-conditioning refrigeration, heat, ventilation 50 to 60% lighting, advertising 20 to 25% of the boiler heating, hot water 5 to 10% of the power of fresh air, water supply, elevators, etc. 5 to 10% of the building's own heat preservation 5 to 10% This shows that the main energy consumption of building energy consumption, air conditioning and lighting, which happens to reflect the comfort of the two; if you only pursue comfort without any energy-saving measures, preliminary estimates of energy consumption per square meter per year, the energy consumption of the building, the energy consumption of the building's energy consumption, the energy consumption of the building's energy consumption. Estimated annual energy costs per square meter at least in more than a hundred dollars; how to achieve both to meet the demand for use and comfort, but also scientific and reasonable energy saving has been our society as a whole to think about the problem.
Practical experience has proved that, with the hand off the water, do not turn on unmanned lights, to prevent (water, electricity, gas) run risk leakage, limiting air conditioning refrigeration (heat) upper and lower limit temperature, and develop a good use of the central air conditioning habits and other energy-saving habits have become recognized as effective means of energy saving; in the stage of vigorously promoting energy saving and emission reduction, to achieve the fastest, the most obvious energy-saving effect, not only the application of energy-saving lamps and lanterns, motor frequency conversion, water-saving sanitary ware and other equipment energy saving. In order to achieve the fastest and most obvious energy saving effect, it is not only the application of installing energy-saving lamps, motor frequency conversion, water-saving sanitary ware and other equipment energy-saving means, but also the need to have a set of comprehensive energy measurement and management system to manage the energy, quantify the energy consumption data, grasp the dynamic information of the energy consumption, find out the starting point of energy conservation, compare the difference of the energy saving effect, and set up a complete set of energy management and energy saving measures to strengthen the level of energy management, and enhance the efficiency of the management work; the use of quantitative assessment indicators of the energy consumption and the energy according to the quantity of charges and other economic indicators Leverage effect, promote the user's skills awareness, to achieve the overall energy saving purposes.
According to authoritative research, it is found that in the summer heat, due to the large number of air conditioners, especially central air conditioning, the power load increases dramatically. According to statistics, as long as the central air conditioning to strengthen the management, cancel the "apportionment by area" charge "pot of rice" practice, the introduction of scientific measurement and reasonable means of charging, so that users develop good habits of air conditioning, consciously take control of air conditioning using temperature combined with Measurement of how much to pay less energy-saving measures, you can achieve energy-saving results, in terms of the central air-conditioning, generally can achieve energy savings of 15 to 20%, and some are even able to achieve energy savings of 25 to 30%.
Shanghai River Luo comprehensive energy consumption itemized measurement, control and management system Introduction The "comprehensive energy measurement management system" developed by Shanghai River Luo Industry Co. Central air-conditioning metering system", "energy measurement and control management system" and other technologies in one comprehensive realization of energy classification, itemized, sub-household metering management of automated energy measurement collection, billing, monitoring and management system.
The system relies on the company has independent intellectual property rights "system software" for the management platform combined with advanced computer technology and network technology, combined with mature self-developed system hardware equipment, organically integrated into the "scientific measurement, reasonable charging, management of energy saving
The system software is a management platform that combines advanced computer technology and network technology with mature self-developed system hardware equipment to organically integrate the concept of "scientific measurement, reasonable charging, and energy-saving management", and to set up an energy operation system for the enterprise that automatically collects, on-line monitors, accurately counts, and reasonably evaluates, and effectively manages, the energy consumed by the enterprise for water, electricity, gas, and air conditioning.
The system utilizes computer technology, on-site energy consumption metering equipment, and bus-based communication networks to form a comprehensive energy management network; energy-consuming equipment is categorized or independently metered, metering data is automatically collected, and users of energy-consuming equipment can define their own metering ranges and monitoring areas. Measuring points, the region to realize the energy online dynamic monitoring, energy summary settlement, energy consumption indicators comprehensive assessment reference, historical data records query, energy consumption reports automatically generated. For the rational allocation of energy to provide decision-making basis for the automated management of energy to provide an effective means for the systematic quantification of energy consumption data, energy saving and reduction of energy consumption to provide a scientific means of management.
Energy consumption sub-metering system policy
On the building construction energy measurement and management system, has been for the national to local government departments in charge of the functions of the high attention; various regulations, standards, guidelines have been introduced. Is a green energy-saving buildings, intelligent energy-saving buildings, an important assessment indicators, from the practical point of view, the implementation of integrated energy management is the trend of the policy, the people's hearts, is the realization of property energy management to achieve energy saving, high efficiency, fairness, reasonableness, humane and an important initiative; more for the property to bring accurate, timely and accessible to the convenience of the case.
Some of its relevant content is excerpted as follows:
"The centralized central air-conditioning system of cold and heat metering and heating in the northern region of China, is an important building energy-saving measures. When the time and circumstances require and the corresponding conditions are available, the practice of setting up cold and heat metering devices according to different floors, different indoor areas, and different users or rooms is recommended." -- from "Energy Saving Design Standards for Public *** Buildings" GB 50189-2005 "
Establishment of a statistical system for energy consumption in governmental organizationsEstablishment of a statistical index system for energy consumption, carrying out of special surveys on energy consumption in governmental organizations, monitoring of the energy consumption of typical buildings, selection of high-energy-consuming buildings for The government will establish a statistical information management platform for energy consumption, incorporate the energy consumption of government organizations into the energy statistics system of the national economy, and carry out a nationwide energy consumption census" -- from the "Opinions on the Implementation of the Ten Key Energy Conservation Projects in the Eleventh Five-Year Plan". Project Implementation Opinions"
To realize the strict implementation of the 50% energy-saving standard for residential buildings and public **** buildings during the 11th Five-Year Plan period, to accelerate the reform of the heating system, and to increase the promotion of energy-saving technologies and products for buildings, aiming at controlling the energy consumption of warming, air conditioning, and lighting from the design stage, and to strengthen the metering and management of energy consumption. " -- from "the state issued a" energy-saving medium- and long-term special plan "" Article 38
The state takes measures to implement centralized heat supply buildings in steps to implement heat supply sub-metering, according to the heat consumption New buildings or energy-saving renovation of existing buildings shall, in accordance with the provisions of the installation of heat metering devices, indoor temperature control devices and heating system control devices. Specific measures shall be formulated by the competent construction department of the State Council in conjunction with the relevant departments of the State Council." -- from the "Chinese People's *** and State Energy Conservation Law"
Two, the strict implementation of air-conditioning temperature control standards All units in public *** buildings, including state organs, social organizations, enterprises and institutions and organizations and individual business households, in addition to hospitals and other special units, as well as in the production process on the temperature of the specific requirements and approval of the users, the indoor air-conditioning temperature setting shall not be lower than 26 degrees Celsius in summer, and the indoor air-conditioning temperature setting shall not be higher than 20 degrees Celsius in winter. [The General Office of the State Council on the strict implementation of the public **** building air conditioning temperature control standards notice] (xxvii) Control of indoor air conditioning temperature.
All units in public **** buildings, including state organs, social organizations, enterprises and public organizations and individual businessmen, except for specific purposes, the indoor air-conditioning temperature setting in summer shall not be lower than 26 degrees Celsius, and the indoor air-conditioning temperature setting in winter shall not be higher than 20 degrees Celsius. Relevant departments should accordingly revise and improve the public **** building indoor temperature related standards, and strengthen supervision and inspection. (36) Strengthening energy statistics and measurement management. The State Council's decision on strengthening energy conservation
System design ideas
1, system design energy metering system design
Overall follow the scientific management of energy consumption, promote independent energy conservation, quantify energy consumption data, reasonable measurement and charging, improve the efficiency of the management, promote the overall energy conservation, and strive to create a green and energy-efficient buildings as a principle. It focuses on the management core of scientific equipment configuration, effective management control, and management for energy saving. Designed to fully understand the water, electricity, heating professional design drawings, according to the requirements of the mission statement, combined with the principle of energy classification sub-metering, reasonable choice of metering points.
Air-conditioning energy metering first, the basement air-conditioning system of cold, heat source implementation of the system host to supply the main system of the design of the various channels of the design of the amount of points, the implementation of energy metering for the building of air-conditioning across the whole of the energy accounting basis. Secondly, each floor of the floor main pipe set measurement points. Finally, the end of the air conditioning fan coiler on the floor of the implementation of time measurement based on energy consumption measurement and networking online monitoring, to strengthen the control and management of the unit's energy consumption; to achieve the use of energy-saving end of the air conditioning temperature limitation (cooling is not less than 26 ° C, heating is not higher than 2026 ° C), the humanization of temperature regulation, and ultimately realize the use of air conditioning behavioral energy saving and energy saving management, to promote the overall energy efficiency The improvement of the overall energy-saving efficiency.
Electricity sub-metering is mainly on the first floor of the low-voltage distribution cabinets in the main circuit of each power consumption design points. According to the electrical design drawings, each floor power, lighting and other on-site distribution box main supply circuit by the basement substation low-voltage distribution cabinets in the main circuit of each feeder separate direct supply, so the measurement of electricity is mainly concentrated in the basement substation low-voltage distribution cabinets, mainly for the low-voltage distribution in the main circuit of each feeder. Cold water sub-metering according to the water professional design drawings, the first floor of the first floor bathroom water supply mains, air conditioning water supply mains and kitchen water supply mains design highlights. First to fifth floor bathroom water supply main design volume point.
2, the system equipment configuration
Central air-conditioning energy metering through the central air-conditioning water supply by installing a flow meter, in the supply and return pipes were installed temperature sensors, each metering point is configured with an air-conditioning billing settlement instrument; settlement instrument real-time collection of the flow of each household, the difference between the temperature of the data and settlements and the air-conditioning energy consumption according to the comprehensive calculation of the implementation of the unit price of the calculation of the cost, display.
Each air conditioning metering point of the equipment collectively referred to as "HOOLOE air conditioning billing meter", the working principle of the equipment, each set of "air conditioning billing meter" instrument includes: a settlement display meter, flow meter 1 (the program selects the) Each set of "air conditioning billing meter" includes: a settlement display meter, a flow meter (this program selects the "pipeline electromagnetic flow meter") and a pair of PT1000 high-precision temperature sensors.
Air-conditioning billing meter using AC220V dedicated power supply, power line using RVV3 × 1.0 specification wire, using RS485 bus form of networking communication, communication line using RVVSP2 × 1.0 specification wire, flowmeter, temperature sensors and the settlement of the display meter with the connecting line with the RVVP4 × 0.5 specifications of the wire. All wires need pipe laying.
Central air-conditioning end of the timing measurement of central air-conditioning system refers to the end of the fan coil, fan coil timing measurement, networking management, the use of "HOOLOE networking-type timing energy-saving thermostat" way referred to as "timing thermostat", mainly for offices, elevator halls, management rooms, and the temperature sensor. For offices, elevator halls, management rooms, conference rooms and other areas of the fan coiler thermostat, timing thermostat can achieve the traditional three-speed mechanical (electronic) thermostat all the local operations (open and close, wind speed settings, mode switching, temperature settings, room temperature display), but also locally display the actual use of each fan coiler time, in the energy management center can be remotely monitored coiler operating indicators and actual use of time, remote (point control, group control), remote (point control, group control), and the actual use of time, the actual use of the fan coiler thermostat. In the energy management center, it can remotely monitor the operation indexes of the coiler and the actual use time, remotely (point control, group control) fan coiler (opening and closing, air speed setting, mode switching, temperature setting), as well as self-control and manual control of arrears. The equipment is installed in 86-type electrical pre-buried bottom box, the wiring is the same as the traditional three-speed mechanical (electronic) thermostat, according to the different valve control line can be selected from the 5-wire or 7-wire design, timing thermostat is powered by 220V power supply taken from the fan coiler. In the system because of the number of thermostats, so, in the floor on the timing thermostat configuration "data concentrator" to implement group management.
Power energy metering smart meter using "HOOLOE data collector" to implement the collection. Collector upstream and downstream communication line using RVSP2 × 1.0mm specification wire; collector installed in the weak power room, the data collector to take 220V dedicated power supply, power supply line using RV3 × 1.0mm wire, all wires need to be laid in the pipe.
Water supply water metering data collection of the cold water meter at each water metering point were configured with network direct-reading water meter, the main metering parameter is "water consumption", the water meter is selected M-bus communication interface, labeled communication protocols, less than or equal to the 9600bps baud rate photoelectric direct-reading type of water meter, the meter meter reading with a system of The meter reading has the characteristics of systematic reading and dial displaying "0" error. The meter is installed in the pipeline of the water consumption point, and the "HOOLOE data collector" is installed in the weak power well of the floor, and the data collector is powered by 220V uninterrupted power supply.
System network structure: the program of this project metering system using RS485 bus network communication, from the management of the host connected to a system communication bus through the management of the partition; the entire system takes into full account the possibility of future system expansion and make the corresponding system capacity reserved; system management host is set up on the first floor of the monitoring center, the use of independent management of the host computer, the host is open for BA and other communication interfaces for third-party system integration. Third-party system integration of communication interfaces, the use of completely open database form for BA system call.
Metering system main equipment using 220V uninterruptible power supply centralized power supply, to ensure the stability of the entire system; the system adopts multi-level authority management and encryption processing, to protect the system and the security of the data 4, the system features a variety of functional characteristics of the flexible management mode: for different customer groups, diversified needs, the system can provide a variety of measurement, assessment management mode.
Flexible and variable management mode, i.e., variable configuration management mode: when the end user or user group changes, without changing the hardware equipment, under the premise of software reorganization, you can change the original user's measurement and assessment methods. Rich operation interface: there are a variety of ways to query at any time, displaying various types of users of energy use (historical, current and changing trends). Suggestions on the use of user energy consumption.
Basis for optimal allocation of energy: the system can be based on the use of energy consumption, timely summary of energy consumption data for the deployment of energy supply, related equipment operation (such as the number of units of equipment in operation, the capacity of the size of the real-time decision-making basis for the operation of the equipment in the most economical state, to achieve the effect of energy saving and prolonging the service life of the equipment.
Auxiliary system failure analysis: By comparing the energy consumption values of the relevant nodes, it can assist in judging the system equipment failure, blockage, leakage, preventing problems before they occur and improving the system's operational safety and management level.
Online monitoring and management: real-time control and management of the current working status of all metering points; stable performance: input signals, output signals are all optoelectronic isolation, data protection, redundancy processing, program self-recovery.
Stable and accurate data transmission: signal transmission using high-voltage lightning chip and optoelectronic isolation and other technologies, with a bus up to 10 kilometers above the RS485 network long-term stable operation experience to ensure the reliable collection of real-time data.
System security: The system adopts a series of security measures, such as: authority control, user login, real-time virus database upgrade, firewall and other measures to ensure data security. Important data are automatically backed up locally and off-site.
Independent Intellectual Property Rights: The core equipment of the system is designed, developed and produced by ourselves, with independent intellectual property rights, and the system is easy to modify and upgrade, and there is no intellectual property dispute.
System configuration is simple and universal: few network devices, simple system structure, powerful and reasonable configuration. The system hardware adopts a unified configuration, strong generality, fewer types of equipment, fewer spare parts, the system can be remotely maintained, the need to invest in the operation of fewer management personnel, low maintenance costs