Discussion on campus energy efficiency management solutions based on cloud platform management

Ren Yunye (Ankerui Electric Co.
, Ltd.
) Abstract In response to the call of the state to build a green campus, effectively improve the level of energy utilization in colleges and universities, and promote the rational allocation of energy resources in
schools.

In view of the problem of large energy consumption of college campuses, this paper takes the process of building an intelligent comprehensive energy efficiency management platform on a campus as an example, and details the platform construction system, technology, function and physical architecture, as well as energy data collection, energy efficiency management, energy operation monitoring and other functions, the use of the system effectively improves the energy use efficiency of colleges and universities, promotes the construction of green campus, and responds to the national policy call for
the construction of a "two-type society" and a green campus.

Keywords Energy efficiency management Energy conservation and emission reduction Universities Cloud platform I.
Introduction Energy is an important material foundation for
developing the national economy and improving people's lives.

With the development of the national economy, the proportion of building energy consumption in the total energy consumption of society has risen steadily, and the restriction effect of energy pressure on economic development has become increasingly obvious, so it is urgent to reduce building energy consumption
.

As one of the important components of large-scale public institutions, universities have a large amount of buildings, high energy consumption, and serious energy waste
.

In response to the call of the national policy, through the establishment of a scientific campus energy management system to build a conservation-oriented campus, to achieve the purpose of energy conservation and emission reduction, the implementation of the scientific concept of development, to a certain extent, can alleviate the current energy pressure facing China, to help achieve sustainable economic development
.

Colleges and universities are the main front for cultivating talents and promoting China's scientific progress, is a cradle for cultivating talents, and an innovation base for scientific research work, and carries out in-depth construction of thrifty campuses in China's colleges and universities, disseminates the fine tradition of thrift and thrift, sets an example of conservation for students, and creates a campus cultural atmosphere
of energy conservation and environmental protection.

Therefore, it is very important
to build a set of campus comprehensive energy monitoring and management platform to realize the unified management and centralized control of campus energy, realize the reliable, stable, clean and efficient supply of energy, and reduce the energy consumption of university buildings.

Second, the case study to a university as an example, the school adheres to the concept of "green, energy-saving, sustainable development", and has built a number of landmark and exemplary green energy-saving projects
on campus.

Such as the campus historical protection landmark building auditorium, the use of authentic air ducts of fresh air pre-cooling (hot) air conditioning ventilation system, seat air supply system, building energy-saving materials and insulation of the envelope structure and other energy-saving systems and measures; The newly built Zhenhe Building adopts energy-saving systems and measures
such as atrium composite ventilation, ice storage and air conditioning, inverter water supply, and natural lighting in the underground parking garage.

Solar photovoltaic technology, ground source heat pump, low-radiation energy-saving exterior window, building shading, roof greening, light pipes, energy-saving lighting, radiant air conditioning terminal system are also used in Wenyuan Building, Rising Sun Building, Swimming Pool, Environment Building, Teaching Building, Library and other building units
.

In the process of renovation, the student bathroom adopts a series of effective energy-saving equipment
such as solar hot water, electric heat storage boiler, reclaimed water treatment and reuse, heat recovery and utilization of bath wastewater, and IC card use system.

In terms of hydropower systems, the school has an energy management system and installed a remote meter reading device
.

Remote meter reading has a special person for maintenance, not only real-time monitoring of power system data, but also retaining data records
.

For the transient and unmeasurable phenomena caused by network failures and other issues, the energy management center will solve
them in a timely manner.

In terms of water supply system, the school's existing water supply mode is municipal water supply, and some buildings use reclaimed water recycling systems
.

The school has established a remote monitoring and meter reading system for water metering devices in each campus, collecting water consumption data from various buildings and departments, with a collection frequency of 1 time per day and a collection time of zero per
day.

From the perspective of air conditioning system, the operation and maintenance of the air conditioning system of each building of the school is responsible for by the logistics department, and the operation personnel usually only do simple start-stop operations, and the specific operation control is realized
by the controller that comes with the equipment.

Although this mode of operation is convenient for operation and management, it does not guarantee good operation
.

The auditorium and administrative building adopt multi-line and air-cooled heat pump units, which control their own system, and the energy efficiency management system can collect real-time operation conditions, and achieve energy consumption
under the premise of ensuring the effect of air conditioning control system through centralized control, indoor air conditioning, and zoning management optimization.

Most of the teaching buildings and office buildings use split air conditioning, and all control operations are completed by remote control, and students and faculty members control
themselves as needed.

Users often set the temperature setting value too low or too high, so that the air conditioner is in an over-temperature operation for a long time, resulting in waste
of electricity.

In addition, the air conditioner is always in the live state, and even if it is not used, it will consume power
due to standby.

From the perspective of lighting systems, most of the school's architectural lighting systems are manually controlled and do not use technologies
such as voice control and light control.

Therefore, there are often corridors with bright light during the day, offices that use internal shading, and still turn on the lamp to consume electricity, resulting in a large number of lighting system power consumption
.

Using Ankerui Electric's "electronic remote water meter", combined with the campus energy efficiency management platform, the water consumption, water pressure and other data in each scene are monitored and partitioned
.

In response to the new demands put forward by the construction of the university, we will continue to play a good role
in the long term ahead.

With the acceleration of energy transformation and the deepening of power reform, in order to meet the new needs of campus energy management, energy-saving work and energy-saving campus construction, Ankerui has developed a comprehensive solution for energy efficiency management in the education industry by virtue of its years of accumulation in the field of energy management, using the Internet of Things, cloud computing, big data, mobile data and power parameter sensing technology, providing real-time online monitoring of campus energy consumption, statistical analysis of energy consumption data, Folding standard comparison, performance analysis, energy consumption ranking, energy saving evaluation and other functions
.

2.
1 System Architecture Figure 1 Acqua Energy Efficiency Management Scheme Topology Acquarium Education Industry Energy Efficiency Management Scheme consists of
equipment layer, transport layer, data layer and service layer.

The equipment layer (terminal equipment such as water and electricity meters, air conditioning controllers, etc.
) is networked via RS485 dedicated line or wireless (Lora) communication group
.

The transport layer (edge computing gateway) can collect terminal device data through RS485 dedicated line or wireless communication, and transmit data to the data layer
through the campus network by Ethernet or 4G or NB.

The data layer (generally deployed in the campus server) handles the upload data of the transport layer and serves the service layer business, and can do data docking
with the campus card system and other related systems.

The service layer (usually deployed in the campus server) provides data viewing, prepaid management, malignant load management, schedule management, distributed photovoltaic monitoring and other functions
.

2.
2 Platform function diagram 2 AcrelEMS-EDU campus comprehensive energy efficiency management platform cockpit display map Home/comprehensive data: comprehensive display of campus energy consumption overview, including abnormal alarm situation (data abnormality / equipment abnormality), water, electricity and other energy use, campus 3D model customization, and can be added to the campus energy data dynamic display
.

Figure 3 AcrelEMS-EDU campus 3D model diagram Comprehensive monitoring of electricity: monitoring and analysis of energy consumption at all levels of campus 35KV-10KV-0.
4KV; monitoring and analysis of power quality of incoming lines and power quality of key laboratories; monitoring and alarming of the environment in the substation and distribution room; and monitoring of transformers to ensure the safety and stability
of power consumption.

Integrated water monitoring: first-level metering of the total water intake covering all buildings on campus; Secondary metering
of water inlet from a single building.

Individual experimental buildings carry out three-level metering monitoring
.

Through the real-time analysis of water balance through the measurement data of the first-level, second-level and third-level water meters, the alarm can be immediately issued when there is an abnormal water condition
.

Commercial/dormitory prepaid: Prepaid management
of water and electricity consumption for all types of shops on campus.

For studentsDormitory electricity consumption is carried out for timed electricity control, monitoring of illegal electrical appliances and prepaid management
.

Distributed photovoltaic monitoring: provide photovoltaic power plant operation monitoring, inverter operation monitoring, power station power generation statistics, inverter power generation statistics, photovoltaic power station distribution monitoring, inverter curve analysis and other functions
.

Air conditioning energy-saving supervision: to achieve the central air conditioning energy monitoring and split air conditioning electricity monitoring and control
.

Intelligent supervision of street lamps/lighting: Realize the power monitoring and lighting control of indoor lighting and outdoor street lamp lighting, and can be automatically managed or remote group control management
according to pre-set logic.

Campus energy consumption analysis: It can realize energy consumption supervision, energy consumption inquiry, energy consumption alarm, energy consumption publicity, energy consumption audit and other functions, which can help schools clearly and directly understand the energy consumption situation, and assist schools to do a good job in audit publicity
.

Campus energy analysis report: can conduct professional analysis of the overall energy consumption, overall supervision and measurement equipment working status, year-on-year data, chain data, etc.
, to help the school understand the comprehensive energy efficiency of the
campus.

Integrated mobile terminal: Relevant personnel can log in to the energy control system at any time through the mobile phone client to realize the functions of metering, monitoring, control, status feedback, alarm and other functions of various energy systems on campus, and to supervise
the energy consumption of campus water and electricity in real time.

2.
3 Typical hardware Fourth, discuss and think about the construction of green campus, the traditional energy consumption collection and management methods have defects such as poor immediacy, cumbersome collection, low degree of automation, etc.
, which are far from meeting the current energy conservation and emission reduction management needs
.

The existing school energy consumption monitoring platform in the market, such as the AcrelEMS-EDU university comprehensive energy efficiency management platform, improves the collection, statistics and analysis system of energy metering data, and realizes the functions of prepaid management of electricity consumption in dormitory shops, control of public equipment such as street lamp air conditioning, and comprehensive supervision of water use, which is of great practical significance
for campus energy conservation and emission reduction.

Therefore, the establishment of a comprehensive energy efficiency management platform for universities with perfect functions, accurate measurement, reliable and high efficiency is an urgent need
to change the extensive management of energy consumption in colleges and universities and achieve the overall goal of campus energy conservation and emission reduction.

At the same time, as an important base for the dissemination of new technologies and new ideas, the school will run the concept of conservation through campus construction and student education through such management methods, so that energy conservation becomes a habit and thrift becomes a virtue, which also has far-reaching educational significance
.

About the Author Ren Yunye, male, Acquaray Electric Co.
, Ltd.
, application engineer, engaged in the research of comprehensive energy efficiency solutions in universities
.