JP2013079784A - Air conditioning start-up time diagnostic method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning start-up time diagnostic method which determines the propriety of an air conditioning start-up time in an interim period for a building, and optimizes the start-up time to improve energy efficiency.SOLUTION: By an air conditioning start-up time scatter diagram regarding one building on which mean start-up times and room temperatures in an air conditioning system are drawn with the air conditioning mean start-up times set on a lateral axis and room temperatures one hour before start-up of an air conditioning device set on a longitudinal axis, the propriety of improvement about the start-up time of the air conditioning device included in the building is determined. By an external cooling operation situation diagram on which air conditioning start-up times and the room temperatures and external air temperatures one hour before the start-up of air conditioning are drawn with air conditioning systems set on a lateral axis and air conditioning start-up times and temperatures set on one side and other side, respectively on a longitudinal axis, which air conditioning system is to be improved is determined.

Description

  The present invention relates to a method for diagnosing the start-up time of an air conditioner in each air-conditioning system in a building, and more particularly to an air-conditioner start-up time diagnosis method for determining the suitability of the start-up time of an air conditioner in an intermediate period.

  Increasing global environmental issues require building energy conservation and energy efficiency optimization in buildings. In order to reduce energy, it is required to improve various energy efficiencies. For this purpose, a building energy management system (hereinafter abbreviated as “BEMS”) has been introduced, and air conditioning equipment and lighting equipment, etc. in the building facilities are targeted. By monitoring the situation and performing their operation control, the indoor environment and the energy consumption situation are optimized to reduce energy.

  For example, in Patent Document 1, as a building energy management device for setting the actual value of energy used in a building to a target value or less, the actual value of energy used in the building is input at the present time. A collating means for collating the actual value with a target value for a predetermined period, and the result of the collation by the collating means is a monthly cumulative graph, a daily cumulative graph, or a time cumulative graph. There is disclosed a configuration including display control means for displaying a current state with respect to a value on a display unit.

  Patent Document 2 discloses an energy monitoring apparatus that monitors energy consumption in a facility such as a business building, and displays energy consumption information related to energy consumption in the facility on a display means. This is a selection screen for selecting the measurement category when displaying the energy consumption information related to energy consumption in the market, and can be selected by separating the measurement category of the upper hierarchy by predetermined elements in the lower hierarchy A selection screen display means for displaying a selection screen on which the measurement means are hierarchized, and the display means displays a selection screen in which each of the hierarchical measurement sections is selectable, and a desired screen is displayed on the selection screen displayed by the selection screen display means. Selection means for selecting a weighing category, and energy consumption of the weighing category selected by the selection means And energy consumption information display means for displaying the energy consumption information on the display means, is configured to include a disclosed.

  Further, Patent Document 3 discloses a measurement target as a graph display device for an energy management system that can easily perform a graph display for performing a desired evaluation based on a large amount of measurement data from a large number of measuring instruments in a facility. The energy management in the facility is performed in which the graph display for performing the desired evaluation based on the measurement data obtained from a large number of measuring instruments provided for is interactively performed with the operator using the input means and the display means. A graph display device for an energy management system, an original graph storage means for storing various original graphs prepared in advance for performing a desired evaluation in which a measurement name or a time axis is defined for each axis; Displays measurement data storage and storage means for storing and storing measurement data sent from each measuring instrument, and a graph list stored in the original graph storage means The measurement data stored in the measurement data storage means relating to the measurement name of the original graph selected by the operator and the measurement data stored in the measurement data storage means are displayed to the operator and set to each axis of the original graph. A configuration is disclosed that includes means for prompting data selection, and graph display means for prompting an operator to instruct execution of graph display using the selected original graph and measurement data, and performing display according to the instruction.

JP 2008-236904 A JP 2007-199783 A JP 2005-259062 A

  By the way, building management companies that specialize in building management (hereinafter abbreviated as “buildings”) manage multiple buildings, etc., and optimize the indoor environment and energy efficiency for each building. Things are going on. In order to optimize this kind of energy efficiency, for example, in the energy management device described in Patent Document 1, a target value for a predetermined period is set, and the collation result obtained by collating the target value with the actual value is displayed in a monthly format. Displaying in a cumulative graph or the like is performed.

  On the other hand, in order to optimize the indoor environment of a building, it is necessary to grasp the indoor environment of each room individually. Also, because the indoor environment differs depending on the location of the building, etc., building management companies that manage multiple buildings need to understand the indoor environment of each room for each individual building. . Then, based on the grasped data such as the indoor environment, the operation of the air-conditioning equipment and the lighting equipment for adjusting the indoor environment and energy efficiency is adjusted.

  The building management company, etc., explains to the owner of the building how to adjust the operation of the air conditioner and the like to optimize the grasped indoor environment and energy efficiency. At this time, it is necessary to have materials that make it easier for the owner to understand.

  By the way, in an office building where the number of visitors is reduced or absent at night, the air conditioner is generally activated at the time of work. However, as described above, each room is in an individual environment, and in order to optimize energy efficiency, it is necessary to individually judge the air conditioning system arranged in each room and the building. . One way to improve energy efficiency is to optimize the start-up time of each room or air conditioning system individually. In particular, since the room environments are different from each other, for example, changes in the environmental temperature due to cold air at night are different. Therefore, it is necessary to optimize the activation time for each air conditioning system. At this time, it is preferable that there is a material serving as an index for optimizing the activation time.

  Therefore, the present invention pays attention to the fact that BEMS is introduced in many buildings, and based on various measurement data obtained by BEMS, whether or not the start time of the air conditioner in the building is appropriate. The purpose of this is to provide an air-conditioning start-up time diagnostic method that makes it possible to make this determination.

  As a technical means for achieving the above object, the air-conditioning start-up time diagnosis method according to the present invention uses the air-conditioning start-up average time at which the air-conditioning apparatus for one building starts up for the period to be judged on the horizontal axis. , The room temperature at the time one hour before the air conditioning start-up average time is set on the vertical axis, the air-conditioning startup scatter diagram in which the values for each air-conditioning system are drawn, and the air-conditioning system is set on the horizontal axis The air conditioning startup time is set on one of the vertical axes, and the temperature is set on the other, and the air conditioning startup time, the room temperature 1 hour before the startup, and the outside air temperature 1 hour before the startup are drawn for each air conditioning system. It consists of an external cooling operation status diagram, and it is possible to improve the startup time for the optimization of energy efficiency for the values within the desired changeable range in the drawing of the air conditioning startup scatter diagram. Judging that there is It is characterized by determining whether to change the starting time for any of the air conditioning system by FIG.

  For one building, the BEMS collects data on the room temperature of each room, the start / stop information of the air conditioner, and the outside air temperature of the building. The relationship between the start time of the air conditioner of these data and the room temperature one hour before the start time is drawn on the air conditioning start time scatter diagram. For example, when the room temperature range of 22 ° C. to 26 ° C. is set as a changeable range, it can be determined that there is a possibility that the activation time can be optimized for a room or an air conditioning system whose drawn value is within this range. In this case, in the air-conditioning startup scatter diagram, it is unknown which room or air-conditioning system the value included in the changeable range is. For this reason, the external cooling operation state diagram is referred to.

  In the outside cooling operation state diagram, the air conditioning start time, the outside air temperature and the room temperature one hour before the air conditioning start for the air conditioning system including each room are drawn. Among these, it is determined that the energy efficiency can be improved by delaying the air-conditioning start-up time for the air-conditioning system in which the room temperature one hour before the air-conditioning start-up is in the changeable range described above. If the difference from room temperature is small with reference to the outside air temperature, the decrease in room temperature is considered to be small one hour after the drawn data, that is, the air conditioning start-up time. It can be judged that a significant effect cannot be expected.

  According to the air-conditioning start-up time diagnostic method according to the present invention, it is possible to easily determine whether or not improvement of the air-conditioning start-up time for a building is necessary from the air-conditioning startup scatter diagram. And it can be easily judged which air-conditioning start time is changed about which air-conditioning system or room by the said external cooling operation condition figure. Therefore, energy efficiency can be improved by changing the air conditioning start time.

It is an example of the scatter chart at the time of the air-conditioning start-up used for implementation of the air-conditioning start-up time diagnosis method concerning this invention, and is data about one building. It is an external cooling driving | running state figure about the building shown in FIG. It is an external cooling driving | running state figure about another building.

  Hereinafter, the air-conditioning start-up time diagnosis method according to the present invention will be described in detail based on the illustrated preferred embodiment.

  FIG. 1 is a scatter diagram at the time of air conditioning start-up in October of 1999 that is used when implementing the air conditioning start-up time diagnosis method according to the present invention. The room temperature one hour before the start-up time is set, and the relationship between these times and the room temperature for each of the air conditioning systems is drawn. In addition, the hatched temperature range, that is, the room temperature range of 22 ° C. to 26 ° C. is defined as a changeable range. The changeable range is set to a desired range that is appropriate depending on the location conditions and usage of the building.

  FIG. 2 shows an external cooling operation situation diagram in October of the same year for the building on which the air-conditioning startup scatter diagram of FIG. 1 is drawn. In this external cooling operation state diagram, the horizontal axis indicates the air conditioning system, the vertical axis indicates the air conditioning start-up time, and the other vertical axis indicates the temperature. The air conditioning start time ( -) And room temperature (◯) one hour before the start-up of the air conditioner and outside air temperature (◇) one hour before the start-up. The hatched portion is a changeable range for the air conditioning start time.

  The suitability of the start time of the air conditioner is determined with reference to the air conditioning start-up scatter diagram and the external cooling operation status diagram created as described above.

  The air-conditioning start-up scatter diagram is used to determine whether or not the air-conditioning start-up time in the building needs to be improved. The start-up time can be changed for the air-conditioning system showing the values drawn in the changeable range. Judge. This air-conditioning start-up scatter diagram can be used to determine the entire building, but cannot determine whether the start time can be changed for any air-conditioning system. For this purpose, the outside cooling operation situation diagram for the building shown in FIG. 2 is used. In this external cooling operation situation diagram, since the air conditioning system is set on the horizontal axis, it is possible to easily grasp which air conditioning system the data included in the changeable range belongs to. Thereby, it becomes possible to improve about the air-conditioning system which can improve about starting time.

  In the external cooling operation state diagram shown in FIG. 2, since most of the air conditioning systems are included in the changeable range, it can be determined that there is a possibility of improvement for these air conditioning systems.

  FIG. 3 shows an external cooling operation state diagram for different buildings. In this building, there are few air conditioning systems included in the changeable range A, and this building is under good energy efficiency. It can be judged. For the building shown in FIG. 3, when the air-conditioning start-up scatter diagram as shown in FIG. 1 is drawn, since the value included in the changeable range A is small, it is necessary to improve the start-up time of the air conditioner for the building. It is judged that there is little sex.

  According to the air-conditioning start-up time diagnosis method according to the present invention, the energy efficiency is improved by optimizing the operation time of the air-conditioning apparatus. In addition, it is easy to grasp the current problems regarding the activation time of the air conditioner, which contributes to the improvement of the operating efficiency of the air conditioner.

  A Changeable range

Claims (1)

For the period to be judged, set the average air conditioning start-up time at which the air conditioner for one building starts up on the horizontal axis, and set the room temperature at the time one hour before the air-conditioning start-up average time on the vertical axis, An air-conditioning startup scatter diagram depicting values for the air-conditioning system of
Each of the air conditioning systems is set on the horizontal axis, the air conditioning start-up time is set on one of the vertical axes, and the temperature is set on the other, and the air-conditioning start-up time and the room temperature, 1 hour before the start-up are set for each air-conditioning system. It consists of an outside cooling operation situation diagram depicting the outside air temperature one hour before,
Regarding the values within the desired changeable range on the drawing among the drawing values of the air-conditioning startup scatter diagram, it is determined that the startup time can be improved for optimization of energy efficiency,
An air-conditioning start-up time diagnosis method for determining which air-conditioning system to change the start-up time according to the external cooling operation state diagram.

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