Intelligent Technology (IT) in the Hotel energy saving
processing)
Plus additional difficulty, but due to the difficulty of situation in some cases some work-around may be enough decision, i.e. making action correct (+).
Ideas about bug fixing may occur at any stage of the debugging process, but only one may be implemented, which 1) fixes the class of bugs which the described one belongs to, and doesn’t introduce other bugs in other places and/or with other input data.
Experience and knowledge of the program play key roles in all stages of debugging. This knowledge can help both in getting the program snapshot and in searching for the bug’s origin. Examples of key places to look include the start of user input processing, multi-functional procedures, etc. Therefore, the following ideas can be useful to keep in mind.
The Keil burner program interface is shown in figure 3.21.
Figure 3.21 keil program burning interface
Build smarter debugging tools. Since these tools would be used in almost all stages of debugging, it would be useful to “teach” them the program and the program itself should help debuggers.
Figure 3.22 Air conditioning thermostat display
Create a system/DB of key documentation about the program useful in debugging, for example “If there is a problem in aspect A, then look (set breakpoints, etc.) in key places.
Figure 3.23 LCD display interface
3.6 Client (Computing) Software
Client is a piece of computer hardware or software that accesses a service made available by a server. Also known as hotel room management system. It is used with the lower computer RCU module. The main function of the host computer in the hotel room control system is to collect the status information of each room collected by the lower computer and display various information desktop computers in the client software.
Figure 3.24Client Computing
The front-end client’s client software needs real-time display of hotel room related status information. Host stated to actual needs of hotel or customers, CAN bus can be sent to the next bit crew the appropriate control commands, indirect control room equipment. Data can be shared between computers in the housekeeping and engineering departments.
- In hotel power saving intelligent technology application
The intelligent Building Design Standard “(GB / T50314-2006) defines intelligent building as” structure, system of building platform and information usage system, construction. Equipment management system and public security system. Through information technology, automatic control technology, computer technology ,construction technology and another aspects of the comprehensive application of the formation of a “safe, efficient, convenient, energy saving, environmentally friendly and healthy building environment” another advanced techniques to apply automatic monitoring of the efficient management and construction equipment, decrease building power consumption and better the Building comfort and etc.
4.1 HVAC system’s Energy saving control
Heating, ventilation and Air conditioning HVAC is the technology of indoor and vehicular environment comfort. Stated to on average, hotel energy consumption ratio: HVAC, large central A.C system cooling source, fan coil system-wide end of the system plus an fresh air system) 40-50% of consumption of lighting consumption
Figure3.25 Basic HVAC system
Accounting for the 20-30% of drainage equipment and water supply accounted for 10-15%, other mechanical and electrical equipment accounted for 15-20%. Obviously, HVAC system energy consumption is the total building energy consumption [8]. Therefore, the energy-saving design of air conditioning system is reasonable whether the entire building can achieve the key energy-saving goals.
4.1.1 Refrigeration unit’s power saving control
As the power consumption of heat and source tools occupies a huge proportion of A.C system, minimize power consumption is one of important aspects of power-saving A.C system. Individual types of projects load characteristics are different. The big load carrying capacity of a hotel building usually occurs at the dusk or at night, the chiller configuration not be only meet the huge load requirements, but also to match some loads. The cold source of group control skill, efficiency of refrigerationunit that can be maximized and the energy waste caused by operation of redundant cold-water unit can be avoided. Formula for calculating cooling load of air conditioning mentioned below:
In the case of full load operation, the total air conditioning system cooling capacity to meet the cooling load, to avoid energy waste, to save energy. By adjusting the operating status of the host, increasing the cooling efficiency and reducing the energy consumption of the cooling water pump, energy saving can be achieved in a single unit [9].
4.2.2 Chilled water pump’s power saving control
If you use a chilled water pump and a differential pressure bypass system, adjust the setting of the differential pressure bypass valve and the number of chilled water pumps to reduce energy consumption, based on the chiller operation. Meet current job stress and chilled water flow.
4.2.3 Cooling tower’s power saving control
The number of cooling towers used depends on the cooler’s cooling water temperature requirements. When the cooling tower outlet temperature is higher than the set temperature, open the cooling tower. The cooling tower can stop when the cooling tower outlet temperature is below the set temperature. If the cooling tower uses a two-speed motor, the number of running cooling towers should also be determined in conjunction with high / low speed transitions.
When the outdoor temperature is low, the natural cooling of the cooling water circuit to meet the chiller requirements of the cooling water temperature, cooling tower fan does not need to open. By running, the minimum number of units to control the cooling water pump cooling water flow and temperature requirements, thereby reducing energy consumption [4].
4.2.4 Air handling unit’s power saving control
According to the “Design Standard for Energy Efficiency of Public Buildings” (GB50189-2005), the air-conditioning system should adopt the entire air-conditioning system instead of the fan disk in larger rooms or spaces and in air-conditioned areas where more personnel or centralized control of temperature and humidity are required Tube system. Therefore, the hotel building in the lobby, large conference room, banquet hall and other large public places often use the air handler to achieve energy-saving effect. Air processor mode can flexibly adjust the proportion of new return air; in the transitional season can achieve fresh air supply, to save energy. In summer and winter, the fresh air will be the cooling and heating load, so the proportion of fresh air should be reduced to the minimum necessary to prevent unnecessary energy consumption, and before the delayed spring and autumn, the outdoor air.
The temperature is lower than the indoor air temperature. Outdoor fresh air can be used as a natural indoor cooling source, rather than refrigerant coolant. Shorten the cooling of the annual run time. Through the air handler air vents and buildings to set the temperature and humidity sensors, the use of construction equipment monitoring technology to detect indoor and outdoor temperature and humidity, indoor and outdoor air ratio calculation, automatic control of fresh air reflux ratio, and always maintain the efficient operation of the air handler State, reduce energy consumption(8)..
4.2.5 Fan coil unit + fresh air handling unit’s power saving control
In order to make the running time of the system more reasonable, and reduce the energy consumption of buildings, schedule control of fan coil of the hotel elevator and other public areas is necessary and corresponding timing opening and closing settings should be performed according to the functional area set by the fan coil unit.
4.3 Guest room system power saving control
The hotel guest rooms are the longest time guests stay, a direct impact on the guests stay experience and evaluation of hotel rooms. Therefore, the energy-saving control room system must be based on comfort, both to meet the comfort requirements of customers, but also to minimize energy consumption, reduce waste of resources, control the hotel’s operating costs.
Room control system according to the status of the room decided to take what kind of control strategy, that check-in, rental, availability, check-out, maintenance, cleaning, room control system must be with the hotel management system.
This room control system can get the status of rooms and room staff basic information. So that the system can take a reasonable control strategy to enable hotel managers to easily, control the status of the room through the software, both to meet the guests comfort requirements, but also to achieve energy-saving purposes (10). Like other regions, air conditioning and lighting electricity consumption is the main energy consumption. So the room energy saving is mainly reflected in the control of air conditioning and lighting equipment; the same time, the curtains, doors and windows open and closed state will also affect the room temperature efficiency And air-conditioning efficiency, so the detection of curtains and the state of the window can also achieve the purpose of energy-saving. Room.
4.3.1 Lighting control
The room control system can control all the lighting circuits in the room with a key and set the lighting circuit to open and close the automatic control. The brightness of the light in different scene modes, such as occupancy, entertainment, reading, rest and other different modes for guests’ convenience Control the room and get the best light and energy savings in different situations.(7)In addition, with infrared sensors and illuminance sensors, the room control system determines the activity of guests and the intensity of natural light. Automatically shut down the hotel non-activity area lights, indoor lighting brightness adjustment, to achieve the purpose of comfort and energy saving.
4.3.2 Window status inspection and room curtain control
As mentioned above, when the air conditioner is lowered by 1 ° C, the energy consumption will increase by 5-8%. Similarly, in the case of cooling or heating, the indoor temperature is higher or lower than 1 ℃ will produce more energy consumption of air conditioning. Enclosed room can add insulation. In the absence of room curtains and without curtains, the room curtains closed, the room control system is not closed, the remote control room curtains closed, the room control system can be remote curtains to make the room temperature in summer is lower, the winter is higher, lower Air conditioning energy consumption. Therefore, by checking the status of doors and windows in the room control system, hotel managers can be reminded to open and close the doors and windows of each room to prevent the doors and windows from being opened incorrectly, resulting in the increase of energy consumption of the air-conditioners for saving energy
4.3.3 Air conditioning control of room
Occupancy of guest
Room air-conditioning room control skills can achieve network control .And check the hotel front desk rooms open; wind speed, transitional state and room temperature can be measured. The room air remote control through linkage with the hotel management system. According to the state of the room is set the air conditioning project.(8) In order to ensure guests get the best experience, guests are mainly responsible for air conditioning operation, In case guests from all over the country often do not understand the most comfortable local temperature conditions will set the room temperature is too high or too low, resulting in both Not comfortable, but also a waste of energy. Medical experts pointed out that the summer air conditioning temperature is the most appropriate body 24-27 ℃, 26 ℃ is the comfortable human sensing temperature, the minimum should not be less than 22 ℃, indoor and outdoor temperature is not high above 5 ℃, night air conditioning not less than 24 ℃ .
(b) Rental status wait
Because of the temperature, change has the characteristic of lag such as room temperature comfort is low, the guest rooms at the set temperature after a certain periodcannot achieve comfortable state. Air conditioning may be set to high or low temperature reaches the set value will be because the temperature is not appropriate to adjust the air conditioning in the indoor temperature setting value, so repeatedly the guests, cannot get a comfortable temperature, but also a waste of energy. (9)Therefore, the rent and the guests from the real state, the system will automatically adjust the air conditioning control room to insulation operation mode, when the room temperature reaches the setting off solenoid valve, a low speed fan operation; when the temperature from 2℃, open solenoid valve, and the fan runs at low speed, and so forth. The room temperature preservation mode can keep in a comfortable temperature, and run in the state of low energy consumption, after the arrival of guests in air conditioning can quickly reach the guest set temperature, temperature to prevent large lag caused waste of energy, and bring a better experience.
(c) Retirement state
Room control system can be check-out 1-2 hours before or check-out time at the hotel automatically updates, guests automatically updated without air-conditioning will be set to the guest phone in the pattern, because the temperature changes lag, the comfortable room will not be affected Any way, while saving energy.
(d) Cleaning and maintenance status
The room control system can determine the status of the room and the information entered into the room based on information set by the network or card. In the maintenance state, according to the hotel administrator or maintenance personnel access time set time, automatically exit the insulation mode; turn off the room air conditioning. In clean conditions, guest rooms are kept warm while the room temperature control panel is not authorized to control the air conditioners. Room control system can be based on the information granted to the different control authority, to achieve the purpose of energy-saving air-conditioning. (11)
4.4 Lighting system’s power saving control
According to the hotel interior time and the use of different regions, intelligent lighting method for intelligent control of lighting. In the design of lighting under the premise of making maximum usage natural light. Natural daylight is low; lighting is turned on, allowing natural light to be fully coordinated with the summer shade. Based on the building personnel activities and the main work situation, set the appropriate lighting partitions. t through lighting testing and personnel testing, and a series of lighting modes, control the opening and closing of light and glaze. Illuminate when desired to change the misuse of constant lighting For stairs, large spaces, sidewalks halls and another public places to take light control, voice control, timing, sensing and another power-saving control skills(9). Set the time with photoelectric control or natural lighting. Garden lighting and road lighting brightness control or time program control. Floodlights the scenery and brightness by the time control. Parking takes time to process control.
4.5 Power saving control of water supply and drainage system
The two important frequency transformation control of pump are drainage system and water supply. Frequency conversion control technique can save power from four aspects: (a) Speed requirement to save power. Frequency conversion drainage system and water supply can cardinally arrange power supply frequency as stated in the expanse of water runout rate. The output of water is lessen, water pump speed is lowered, therefore it decrease the production power of the pump. (b) Soft start. Starting current of ACmotor:. Starting current can be diminish by inverter by lowering the starting voltage to realize the soft start of the motor. (c) Increase the power factor. In the motor circuit, the motor as an inductive load, the power factor is generally low. In the frequency control circuit, the use of diode rectifier circuit to improve the system’s power factor. (10) To save design redundancy, frequency control can save design redundancy under extreme conditions.
Conclusion
The hotel energy consumption can be exponentially reduce by the use of intelligent skills the ，reduction in maintenance costs hotel operation，improvement of hotel content, and enhancement of guest’s experience. Intelligent skills should be naturally unite under the administration of the hotel management, so management and technology can be merge together to assure that buildings attain effective energy efficiency. In hotel energy saving, evolution in intelligent skills will make a greater support.
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