Air conditioner energy efficiency ratio calculation method based on comfort level, refrigerating system and experiment module

Abstract

The invention belongs to the technical field of comprehensive environment control based on human body comfort, and particularly relates to an air conditioner energy efficiency ratio calculation method based on comfort, a refrigerating system and an experiment module. The air conditioner energy efficiency ratio COP is calculated according to the following formula: COP = 2.012-0.066 T outdoor air + 0.118 T indoor air under the refrigeration working condition; and under the heating working condition, COP is equal to 3.628 T to 0.037 T of indoor air and 0.051 T of outdoor humidity. According to the air conditioner energy efficiency ratio calculation method based on the comfort level, the function of rapidly calculating the air conditioner energy efficiency ratio in practice can be achieved based on the coupling correlation angle of the comfort level and the energy efficiency ratio, and the calculation result is efficient and accurate; and finally, basic support is provided for development of thermal comfort air conditioning equipment and a detection device thereof in regions with hot summer and cold winter under the energy-saving background.

Description

Technical Field

[0001] The present invention belongs to the technical field of comprehensive environmental control based on human comfort, and specifically relates to a method for calculating air-conditioning energy efficiency ratio based on comfort, a refrigeration system and an experimental cabin. Background Art

[0002] Air conditioning equipment is usually used in hot summer and cold winter areas to assist in maintaining the home thermal environment to ensure that the indoor environmental indicators remain within the comfortable range. However, when selecting air conditioning equipment, it is usually only based on the capacity and energy efficiency ratio of the rated working conditions in the sample, and there is a lack of reference for the fluctuation of equipment performance due to changes in the indoor and outdoor thermal environment parameters of the region. Therefore, establishing the coupling correlation law between the performance coefficient of air conditioning equipment and the thermal comfort index can predict the actual operating energy efficiency of air conditioning equipment under multiple working conditions under the premise of meeting the thermal comfort of the regional indoor environment, and provide basic support for the development of thermal comfort air conditioning equipment and its detection device under the background of energy saving. However, there are currently few related studies on the region, and they mainly focus on the research of regional thermal comfort characteristics or air conditioning equipment energy efficiency characteristics, and lack relevant research on the coupling correlation characteristics of comfort and energy efficiency ratio. In terms of standards, there is a lack of evaluation method standards for indoor thermal comfort and air conditioning equipment energy efficiency created in hot summer and cold winter areas, which leads to a lack of reference for the promotion of related research work. Therefore, it is urgent to solve. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a method for calculating the energy efficiency ratio of air conditioners based on comfort. The method can realize the rapid calculation function of the energy efficiency ratio of air conditioners in practice based on the coupling correlation angle of comfort and energy efficiency ratio. The calculation results are efficient and accurate, and ultimately provide basic support for the development of thermal comfort air-conditioning equipment and detection devices thereof in the context of energy saving in hot summer and cold winter areas.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for calculating the energy efficiency ratio of an air conditioner based on comfort, characterized in that the energy efficiency ratio COP of the air conditioner is calculated by the following formula:

[0006] Under refrigeration conditions:

[0007] COP=2.012-0.066T 室外干 +0.118T 室内空 ;

[0008] Under heating conditions:

[0009] COP=3.628-0.037T 室内空 +0.051T 室外湿 ;

[0010] Where:

[0011] T 室外干 Indicates the outdoor air dry bulb temperature, unit: °C;

[0012] T 室内空 Indicates the indoor air temperature, unit: °C;

[0013] T 室外湿 Indicates the outdoor air wet bulb temperature in °C.

[0014] Preferably, a refrigeration system, which applies a method for calculating the energy efficiency ratio of an air conditioner based on comfort, is characterized in that it includes a bench compressor, an oil separator, a first switch valve V1, a condenser, a second switch valve V2, a liquid storage device, a subcooler, a drying filter, a flow meter F, a pre-valve temperature and pressure measuring point, a throttling expansion valve MV, a third switch valve V3, a fourth switch valve V4, an indoor unit, a fifth switch valve V5, an outlet temperature and pressure measuring point, a sixth switch valve V6 and an intake temperature and pressure measuring point arranged in sequence along the refrigerant travel path, and then returns to the bench compressor to form a main line; and also includes a first branch and a second branch, the first branch is connected in series with a seventh switch valve V7 and an inlet temperature and pressure measuring point in sequence, and the first branch The pipe outlets at both ends of the road are respectively connected to a section of the main road between the oil separator and the first switch valve V1 and an end of the main road between the third switch valve V3 and the fourth switch valve V4; an eighth switch valve V8 is arranged on the second branch road, and the pipe outlets at both ends of the second branch road are respectively connected to a section of the main road between the second switch valve V2 and the liquid reservoir and a section of the main road between the outlet temperature and pressure measuring point and the sixth switch valve V6; it also includes a heat load simulation module, the inlet of the heat load simulation module is connected to a section of the main road between the throttling expansion valve MV and the third switch valve V3 through a ninth switch valve V9, and the outlet is connected to a section of the main road between the sixth switch valve V6 and the intake air and pressure measuring point through a tenth switch valve V10.

[0015] Preferably, the heat load simulation module includes a heat exchange coil, and the heating operation of the heat exchange coil is realized by the heating coil, and the cooling operation of the heat exchange coil is realized by the cooling coil supplied by the water-cooled compression condensing unit.

[0016] Preferably, a first electromagnetic switch valve SV1 is arranged at the outlet of the bench compressor, and a second electromagnetic switch valve SV2 is arranged at the outlet of the drying filter.

[0017] Preferably, primary filters are provided at both the inlet and the outlet of the bench compressor.

[0018] Preferably, an eleventh switch valve V11 and a twelfth switch valve V12 are respectively arranged at the inlet and the outlet of the oil separator.

[0019] Preferably, an experimental cabin, which applies the refrigeration system, is characterized in that it includes an outer cabin body and an isolation room located in the outer cabin body, the isolation room constitutes an indoor room, and the space between the isolation room and the outer cabin body forms an outdoor simulation room; a spray device with a simulated rain and / or snowfall environment is arranged on the top of the outdoor simulation room, and the outdoor simulation room is also provided with an infrared radiation lamp, a local blowing device, a simulated wet load module and an outdoor air handling unit; a floor heating module for heating is arranged in the indoor room; and it also includes a fresh air duct, one end of which is connected to the indoor room, and the other end of which passes through the isolation room and the outer wall of the outer cabin in sequence and then is connected to the external environment.

[0020] Preferably, the outdoor air handling unit includes a fan, a humidifying coil, a rear electric heating module and an evaporating coil.

[0021] The beneficial effects of the present invention are:

[0022] 1. High calculation accuracy.

[0023] During calculation, the present invention can predict the actual operating energy efficiency of air-conditioning equipment under multiple working conditions under the premise of meeting the thermal comfort of the regional indoor environment by establishing the coupling correlation law between the performance coefficient of air-conditioning equipment and the thermal comfort index. Ultimately, it provides basic support for the development of thermal comfort air-conditioning equipment and its detection device in hot summer and cold winter areas under the background of energy saving, and the calculation accuracy is precise and efficient.

[0024] 2. The calculation method is fast and simple.

[0025] The device of the present invention can continuously simulate the air-conditioning cop while maintaining the environmental conditions of the comfort test. The synchronous simulation process can ensure that the calculation method can obtain the real-time final value by algebraic means because only specific parameters need to be input. The calculation process is simple and fast, which also ensures the accuracy and efficiency in engineering calculations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a pipeline arrangement state diagram of the refrigeration system of the present invention;

[0027] Figure 2 It is a pipeline arrangement state diagram of the experimental cabin of the present invention.

[0028] The actual correspondence between the reference numerals and component names of the present invention is as follows:

[0029] a-indoor room; b-outdoor simulation room; c-refrigeration system;

[0030] 10-bench compressor; 20-oil separator; 30-condenser; 40-liquid storage; 50-subcooler; 60-drying filter; 70-indoor unit; 80-heat load simulation module; 81-heat exchange coil; 82-heating coil; 83-cooling coil; 90-primary filter;

[0031] 100-outer cabin; 110-spraying device; 120-infrared radiation lamp; 130-local blowing device; 140-simulated wet load module; 150-outdoor air handling unit; 151-fan; 152-humidifying coil; 153-rear electric heating module; 154-evaporating coil; 160-floor heating module; 170-fresh air duct; 180-sensor module. DETAILED DESCRIPTION

[0032] For ease of understanding, here we combine Figure 1-Figure 2 The specific structure and working mode of the present invention are further described as follows:

[0033] The design purpose of the experimental cabin of the present invention is to simulate the environment of the indoor room a where the personnel are located, and to have the ability to create the environmental conditions such as indoor temperature, humidity, wind speed, radiation temperature, air pressure, etc.; at the same time, it can also simulate the external climate environment of the indoor room a accordingly, so as to achieve the simulation experiment effect. In actual operation, the outdoor environment simulated by the experimental cabin is the different temperature and humidity environment corresponding to each season of spring, summer, autumn and winter; of course, it can also simulate extreme weather under natural conditions, such as rain, snow, sunshine, wind and other extreme environments, so as to conduct research on human comfort in the environment of both the outdoor simulation room b and the indoor room a. At the same time, combined with the parameters such as the cooling capacity and energy efficiency ratio of the room refrigeration system c, the relationship between comfort and air conditioner energy efficiency is studied and tested.

[0034] Thus, the above structure is formed as follows Figure 1-Figure 2 After the device is installed, the final functions include:

[0035] 1) Human comfort evaluation function

[0036] 1.1) This function is used to statistically record and measure the user's subjective comfort under actual conditions by means of measurement, investigation, evaluation, etc. under the conditions of the simulated indoor and outdoor unit use environment of the air conditioner. At the same time, the present invention can simulate the decoration conditions of various actual home environments and test the distribution of temperature, humidity and wind speed of room a on the indoor side.

[0037] from Figure 1-Figure 2From the structure in the figure, it can be seen that the entire experimental cabin consists of two parts: the indoor room a that simulates the actual home use environment and the outdoor simulation room b. The indoor room a is a simulation room used to simulate the user's living environment, and the outdoor simulation room b is used to simulate various outdoor environmental temperature, humidity and other changes. The practical area of ​​the indoor room a is fixed, and the indoor temperature and humidity control range is the conventional room temperature and humidity range. The outdoor simulation room b is used to simulate different climatic environments in which the outdoor unit actually operates. The environment has various outdoor environmental conditions such as specific temperature, humidity, wind, sunshine (local), rainfall (local), and snowfall (local).

[0038] When designing specifically, Figure 2 As shown, it includes an outer cabin 100 and an isolation room located in the outer cabin 100, the isolation room constitutes an indoor room a, and the space between the isolation room and the outer cabin 100 forms an outdoor simulation room b. At the same time, a spray device 110 with a simulated rain and / or snowfall environment is arranged on the top of the outdoor simulation room b, and an infrared radiation lamp 120, a local blowing device 130, a simulated wet load module 140 and an outdoor air handling unit 150 are also provided. The outdoor air handling unit 150 includes a fan 151, a humidifying coil 152, a rear electric heating module 153 and an evaporating coil 154. A floor heating module 160 for heating is set in the indoor room a; one end of the fresh air duct 170 is connected to the indoor room a, and the other end passes through the isolation room and the outer wall of the outer cabin 100 in sequence and then connects to the external environment.

[0039] 1.2) It can realize human comfort testing and research, including the testing and analysis of temperature field, temperature, humidity and wind speed at designated points. It can objectively evaluate human comfort when indoor air conditioners blow air in different directions according to different requirements, and provide conditions for subjective evaluation.

[0040] 1.3) While conducting human comfort tests, simulate the cooling and heat absorption and heat dissipation of the air conditioner to the indoor and outdoor environments respectively, and accurately and steplessly adjust the cooling and heat output values. Dynamic coupling comfort research and air conditioner energy efficiency ratio, control characteristics (including heating and cooling rate / amplitude test, temperature deviation test, power consumption test / power consumption characteristic analysis, etc.) and other studies.

[0041] 1.4) The present invention can evaluate the indoor thermal environment of the air-conditioning room according to GB / T 33658-2017 "Indoor Human Thermal Comfort Environment Requirements and Evaluation Methods", and rely on temperature fluctuations, temperature uniformity, vertical air temperature difference, wind sensation index DR and even theoretically predicted thermal sensation PMV to comprehensively construct the equivalent space temperature, so as to conduct a star rating evaluation of the indoor thermal comfort environment. When used specifically, it is possible to consider placing a dynamic display screen in the indoor side room a, so that customers can make a sensory evaluation of "comfortable" or "uncomfortable" immediately after on-site experience, and dynamically display statistical data to evaluate the quantity and proportion of "comfortable" and "uncomfortable" to facilitate actual sampling and verification. The interface of the dynamic display screen can be selected according to the ASHRAE comfort diagram or the GB / T33658-2017 standard, and is used to three-dimensionally display the spatial outline of the entire experimental cabin and the indoor side room a falling into the experimental cabin.

[0042] 2) Energy saving evaluation function:

[0043] The present invention can also measure the cumulative power consumption of the unit by studying the climatic conditions and outdoor working conditions of the product in a typical city, and simulate the operation according to the scenarios that change in each time period every day, so as to facilitate comparison and find ways to improve the energy saving of the product, so as to enhance the competitiveness of the product. In actual operation, the UP table of the PID adjustment table can be considered to input the curve of the climate of the day (except snowfall and rainfall) in multiple segments, so as to simulate the continuous changes of the natural environment.

[0044] Based on the above statement, if Figure 1-Figure 2 As shown, the actual working process of the refrigeration system c and the experimental cabin of the present invention is as follows:

[0045] The test chamber consists of two parts: indoor room a that simulates the actual home environment and outdoor simulation room b that simulates various outdoor environmental temperature and humidity changes.

[0046] The indoor temperature and humidity control range of the indoor room a is usually: dry bulb temperature: 16-30℃; relative humidity: 20%-100%. For example, in the summer when the outdoor ambient temperature is 37℃, the dry bulb temperature in the cabin is 37℃; the relative humidity is 70%; the outdoor wind speed is 1.5m / s; the air conditioner in the indoor room a needs to cool. The cooling capacity is configured according to the area in the room, and the cooling capacity requirement is 2800w; at this time, the energy efficiency ratio of the simulated air conditioner is 2.8, and the heat dissipation of the heat load simulation module 80 is 1000w, and so on.

[0047] At this time, the working mechanism of the experimental cabin of the present invention is as follows:

[0048] The evaporating coil 154 in the outdoor air handling unit 150 is connected to the normal temperature compression condensing unit and the low temperature compression condensing unit, and is selected and switched according to the different evaporating temperatures of the evaporating coil 154. In view of the above-mentioned operating temperature requirement of 37°C, the normal temperature compression condensing unit is selected this time, and the cooling capacity of the unit is input to the outdoor air handling unit 150 through the evaporating coil 154. Since the cooling capacity cannot be continuously and steplessly adjusted, the heat of the rear electric heating module 153 is used to control the dry-bulb temperature in the outdoor simulation room b. The wet-bulb temperature in the outdoor simulation room b is achieved by controlling the humidifying coil 152 in the outdoor air handling unit 150, and then controlling the wet steam entering the outdoor simulation room b. The sunlight intensity of the outdoor simulation room b is achieved by adjusting the illumination of the infrared radiation lamp 120. The wind speed in the outdoor simulation room b is achieved by adjusting the local blowing device 130. The indoor room a is arranged as follows Figure 1 The refrigeration system c shown in the figure, when working, adjusts the evaporation temperature of the indoor unit 70 of the indoor room a through the throttling expansion valve MV; and adjusts the cooling capacity of the indoor unit 70 through the rotation speed of the bench compressor 10. At the same time, by measuring the flow rate of the refrigerant of the refrigeration system c and the enthalpy difference of the inlet and outlet refrigerant of the indoor unit 70, the cooling capacity entering the indoor room a can be adjusted steplessly and accurately according to the research requirements. Then, according to the preset energy efficiency ratio of the air conditioner in the comfort test, the heat that should enter the outdoor simulation room b under the energy efficiency ratio can be obtained, and finally a closed-loop human comfort assessment + air conditioning energy efficiency ratio relationship test is completed.

[0049] Designated point measurement means: after the working conditions are stable, the temperature uniformity of the environment can be measured through the temperature field thermocouple set in the indoor room a. The temperature and humidity of the designated point in the environment can be measured through the temperature sampling sensor. The wind speed at the designated point can be measured through the anemometer. The radiation temperature at the designated point can be measured through the black ball temperature sensor. The above measurement points can be Figure 2 As shown, a set of sensor modules 180 are used for integration. By analyzing and comparing these parameters at the measuring points, an objective evaluation of human comfort can be formed, and conditions for subjective evaluation can be provided; of course, other known sensor testing methods can also be used to achieve data collection.

[0050] The working principle of the present invention when the air conditioner in the indoor room a needs to heat is the same as that described above and will not be described in detail.

[0051] While conducting human comfort tests, by simulating the heat absorption and heat dissipation of the air conditioner to the indoor and outdoor environments respectively, the output values ​​of the cooling and heat can be accurately and steplessly adjusted accordingly, so as to realize the dynamic coupling comfort research and the energy efficiency ratio and control characteristics of the air conditioner.

[0052] Under the aforementioned working principle, the specific process of simulating the cooling and heating of the indoor environment (i.e., the indoor room a) and the heat and cold discharge of the outdoor environment (i.e., the outdoor simulation room b) of the present invention is as follows:

[0053] A. When the indoor room a is cooled and the outdoor simulation room b releases heat;

[0054] The refrigerant discharged from the bench compressor 10 passes through the primary filter 90, and then passes through the inlet temperature and pressure measuring point formed by the first pressure gauge P01 and the first thermometer T01, and then enters the first electromagnetic switch valve SV1 and the eleventh switch valve V11 in the open state, and then enters the oil separator 20. At this time, the twelfth switch valve V12, the first switch valve V1 and the second switch valve V2 are opened, and the seventh switch valve V7 is closed. The refrigerant flows through the condenser 30, the liquid storage tank 40 and the subcooler 50 in sequence, and then flows through the drying filter 60, the second electromagnetic switch valve SV2 and the flowmeter F, and then passes through the valve pre-temperature and pressure measuring point formed by the second pressure gauge P02 and the second thermometer T02, and enters the throttling expansion valve MV. Subsequently, the high-pressure refrigerant is throttled into a low-pressure gas-liquid two-phase refrigerant state, and then flows through the third switch valve V3 and the fourth switch valve V4 in sequence, and then enters the indoor unit 70. The indoor unit 70 is used to simulate the air conditioning of the indoor room a. After the refrigerant exchanges heat with the air in the indoor room a in the indoor unit 70, it becomes a low-pressure superheated gas, and then flows in sequence through the fifth switch valve V5, the outlet temperature and pressure measuring point composed of the fourth pressure gauge P04 and the fourth thermometer T04, the sixth switch valve V6, the primary filter 90 and the suction temperature and pressure measuring point composed of the fifth pressure gauge P05 and the fifth thermometer T05, and is re-inhaled into the stand compressor 10 to complete a refrigeration cycle.

[0055] At this time, by frequency conversion to adjust the capacity of the bench compressor 10, the cooling output of the indoor unit 70 can be adjusted steplessly. The heat discharged into the outdoor simulation room b is realized by the heat load simulation module 80. The heat load simulation module 80 is made into the type of an air-conditioning outdoor unit and is placed in the outdoor simulation room b as a whole. The heat load simulation module 80 is bridged in the corresponding pipeline of the refrigeration system c through the ninth switch valve V9 and the tenth switch valve V10, and has a built-in heating coil 82 and a heat exchange coil 81. The heat exchange coil 81 is connected to the bench of the refrigeration system c through multiple valves.

[0056] When the indoor room a is cooled and the outdoor simulated room b releases heat, the air conditioning energy efficiency ratio COP under the cooling condition can be obtained simultaneously. The experimental process is as follows:

[0057] The refrigerant selected is R410a;

[0058] The refrigerant mass flow rate Q entering the indoor unit 70 mF01 =0.035kg / s, measured by flow meter L;

[0059] Refrigerant liquid specific enthalpy h before entering the throttling expansion valve MV f1 , after measuring the relevant pressure and temperature at the temperature and pressure measuring point before the valve, the physical property table is consulted to obtain; during the experiment, the temperature before the valve T02 = 43 ° C; the pressure before the valve P02 = 3061.99 kPa, and the table is consulted to obtain h f1 =271.34 kj / kg;

[0060] Specific enthalpy of refrigerant gas leaving the indoor unit 70 f2 , after measuring the relevant pressure and temperature at the outlet temperature and pressure measuring point, the physical property table is consulted to obtain; during the experiment, the refrigerant temperature T04 leaving the indoor unit 70 is 20℃; the refrigerant pressure P04 leaving the indoor unit 70 is 1147.16kPa, and the table is consulted to obtain h f2 =433.23 kj / kg;

[0061] Then the cooling capacity Φoa entering the indoor unit 70 is:

[0062] Φoa=Q mF01 ·(h f2 -h f1 )=0.035×(433.23-271.34)=5.666kW;

[0063] When the above measurement points are running stably, the heat discharged into the outdoor simulation room b can be adjusted by the heating coil 82 in the heat load simulation module 80. The electric heating amount Qr put into the heating coil 82 is the heat discharged into the outdoor simulation room b. The heating amount is adjusted until the power meter displays the required value. Qr = 8.1kW during the experiment;

[0064] but:

[0065] The simulated air conditioning energy efficiency ratio: COP = Φoa / (Qr-Φoa) = 5.666 / (8.1-5.666) = 2.33;

[0066] Through further research on the experimental chamber, it is known that the actual thermal sensation index TSV of residents in hot summer areas under the experimental simulation environment will correspond to both an indoor air temperature and an outdoor air dry bulb temperature. The COP of the unit at each operating point has the following relationship with the indoor air temperature and the outdoor air dry bulb temperature:

[0067] COP=2.012-jT 室外干 +kT 室内空 .

[0068] Therefore, the experimental cabin of the present invention can dynamically adjust the COP of the simulated air-conditioning unit to continuously change, so that after each acquisition of COP, the corresponding TSV value can be obtained by conventional sensory evaluation to form a set of judgment samples. 室内空 and outdoor air dry bulb temperature T 室外干 , we can continuously obtain judgment samples to form a large data set, that is, we can fit the values ​​of coefficients j and k, and finally get the COP of the air conditioner corresponding to different indoor air temperatures T 室内空 and outdoor air dry bulb temperature T 室外干 The performance curve of is as follows:

[0069] COP=2.012-0.066T 室外干 +0.118T 室内空 .

[0070] B. When the indoor room a is heating and the outdoor simulation room b is releasing cooling:

[0071] The refrigerant discharged from the bench compressor 10 passes through the oil separator 20. At this time, the first switch valve V1 and the second switch valve V2 are closed, and the seventh switch valve V7 is opened. The refrigerant flows through the fourth switch valve V4, the indoor unit 70, the outlet temperature and pressure measuring point, and the eighth switch valve V8 in sequence, and then continues to flow through the liquid storage tank 40, the subcooler 50, and then flows through the drying filter 60, the flow meter F, passes through the valve pre-temperature and pressure measuring point, and then passes through the throttling expansion valve MV. At this time, the high-pressure liquid is throttled into a low-pressure gas-liquid two-phase refrigerant state, and then flows through the ninth switch valve V9 into the heat exchange coil 81 in the heat load simulation module 80 of the outdoor simulation room b, and then flows through the tenth switch valve V10, and finally through the suction temperature and pressure measuring point, and finally sucked into the bench compressor 10 to complete a refrigeration cycle.

[0072] At this time, since the third switch valve V3 and the sixth switch valve V6 are closed, the heat output of the indoor unit 70 can be adjusted steplessly by adjusting the capacity of the bench compressor 10 by frequency conversion. The coldness discharged into the outdoor simulation room b is realized by the heat load simulation module 80; the heat load simulation module 80 has a built-in heating coil 82 and a heat exchange coil 81; the heat exchange coil 81 is connected to the bench of the refrigeration system c through multiple valves. Through the built-in heating coil 82 and the built-in cooling coil 83, the coldness of the heat exchange coil 81 can be adjusted steplessly; at the same time, the cooling coil 83 realizes refrigeration through a water-cooled compression condensing unit. Since the present invention can simulate the coldness discharged into the outdoor simulation room b, and then through the built-in heating coil 82 and the cooling coil 83 in the heat load simulation module 80, the purpose of steplessly adjusting the heat of the heat exchange coil 81 can be achieved. At this time, the electric heating amount input by the heating coil 82, the cooling amount of the cooling coil 83, and the cooling amount of the heat exchange coil 81 are added together to obtain the final cooling amount discharged into the outdoor simulation room B. Therefore, in addition to the human comfort research, the present invention can further derive the relationship between comfort and air conditioning energy efficiency ratio when conducting comfort research.

[0073] When the indoor room a is heated and the outdoor simulated room b releases cold air, the air conditioning energy efficiency ratio COP under heating conditions can be obtained simultaneously. The experimental process is as follows:

[0074] The refrigerant selected is R410a;

[0075] The refrigerant mass flow rate Q entering the indoor unit 70 mF01 =0.027kg / s, measured by flow meter L;

[0076] The specific enthalpy of the high pressure gas of the refrigerant entering the indoor unit 70 is h r1 , after measuring the relevant pressure and temperature at the inlet temperature and pressure measuring point, the physical property table is consulted to obtain; during the experiment, the inlet temperature T03 = 78.1℃; the inlet pressure P03 = 2138.13kPa, and the table is consulted to obtain h r1 =480.92 kj / kg;

[0077] The refrigerant liquid specific enthalpy h leaving the indoor unit 70 r2 , after measuring the relevant pressure and temperature at the outlet temperature and pressure measuring point, the physical property table is consulted to obtain; during the experiment, the refrigerant temperature T04 leaving the indoor unit 70 is 32.88℃; the refrigerant pressure P04 leaving the indoor unit 70 is 2125.43kPa, and the table is consulted to obtain h r2 =253.33 kj / kg;

[0078] Then the heating amount Φob entering the indoor unit 70 is:

[0079] Φob=Q mF01 ·(h r1 -hr2 )=0.027×(480.92-253.33)=6.069kW;

[0080] At the same time, continue to calculate the refrigerant high-pressure liquid specific enthalpy h of the liquid pipe of the heat exchange coil 81 entering the outdoor simulation room b l1 , after measuring the relevant pressure and temperature at the temperature and pressure measuring point before the valve, the physical property table is consulted to obtain the result; during the experiment, the temperature before the valve T02 = 30.5℃; the pressure before the valve P02 = 2118.19kPa, and the table is consulted to obtain h l1 =248.53kj / kg.

[0081] The specific enthalpy of the low-pressure gas of the refrigerant leaving the heat exchange coil 81 of the outdoor simulation room b is h l2 , after measuring the relevant pressure and temperature at the suction air and pressure measuring point, the physical property table is consulted to obtain; during the experiment, the suction pressure P05 = 573.13 kPa; the suction temperature T05 = -2 ° C; the table is consulted to obtain h l2 =425.76kj / kg.

[0082] Then the cooling capacity Φoc of the heat exchange coil 81 in the outdoor simulation room b is:

[0083] Φoc=Q mF01 ·(h l2 -h l1 )=0.027×(425.76-248.53)=4.73kW;

[0084] Then, by simulating the cold amount discharged into the outdoor simulation room b, the heat of the heat exchange coil 81 is steplessly adjusted by relying on the built-in heating coil 82 and cooling coil 83 in the heat load simulation module 80.

[0085] At this time, the electric heating amount Qr of the heating coil 82 is 0.82kW, which is a stepless input value;

[0086] The cooling capacity of the cooling coil 83 is Φf = 1.21 kW, which is a non-adjustable constant value;

[0087] The final cooling capacity Φa discharged into the outdoor simulation room b is:

[0088] Φa=Φoc+Φf-Qr=4.73+1.21-0.82=5.12kW;

[0089] Therefore, when the indoor environment is in heating condition, the COP calculation result is as follows:

[0090] COP=Φob / (Φob-Φa)=6.069 / (6.069-5.12)=6.4;

[0091] Through further research on the experimental cabin, it is known that the actual thermal sensation index TSV of residents in cold winter areas under the experimental simulation environment will correspond to both an indoor air temperature and an outdoor air wet bulb temperature. At this time, the COP of the unit at each operating point has the following relationship with the indoor air temperature and the outdoor air wet bulb temperature:

[0092] COP=3.628-mT 室内空 +nT 室外湿 .

[0093] Therefore, the experimental cabin of the present invention can dynamically adjust the COP of the simulated air-conditioning unit to continuously change, so that after each acquisition of COP, the corresponding TSV value can be obtained by conventional judgment method to form a set of judgment samples. 室内空 and the outdoor air wet bulb temperature T 室外湿 , a large data set can be obtained, that is, the values ​​of coefficients m and n can be fitted, that is, the COP corresponding to different indoor air temperatures T can be finally obtained. 室内空 and the outdoor air wet bulb temperature T 室外湿 The performance curve of is as follows:

[0094] COP=3.628-0.037T 室内空 +0.051T 室外湿 .

[0095] Of course, in actual operation, TSV can also be obtained through the following formula to form a more accurate coupling between comfort and related temperature:

[0096] For summer conditions, that is, the cooling condition of the air-conditioning unit, the calculation formula of TSV is:

[0097] TSV = 0.4256PMV + 0.3194;

[0098] For winter conditions, that is, the heating condition of the air conditioner, the calculation formula of TSV is:

[0099] TSV = 0.6638PMV + 0.6164;

[0100] Where:

[0101] PMV is a theoretical prediction of thermal sensation.

[0102] It can be seen from the above that the refrigeration system c and even the experimental cabin of the present invention provide more effective hardware support. The advantage of the device of the present invention is that it can test the relationship between the air conditioning energy efficiency ratio and the comfort working condition without relying on the air conditioners actually sold on the market. The energy efficiency ratio of the air conditioners actually sold has a small error specified by the standard. For example, the nominal COP value is 3, and the standard allows a deviation of ±5% in the cooling capacity. The power consumption of the air conditioner, the standard allows a deviation of ±5%, so the COP of the actual air conditioner is not necessarily accurate 3, so the use of traditional units will produce certain deviations in the comfort research and the relationship between the air conditioner COP and other studies. At the same time, due to the comprehensiveness of the comfort research requirements, for high-energy consumption air conditioners eliminated by the energy efficiency standards, the corresponding units cannot be purchased on the market. At this time, using the device of the present invention, it is still possible to simulate an air conditioner with the corresponding energy efficiency, which is also more conducive to the research on comfort and air conditioning energy efficiency ratio. For more efficient air conditioner products that exceed the low energy efficiency standards that have not yet been developed or mass-produced in the industry, the device of the present invention can also timely and targetedly simulate qualified air conditioners, which further provides a stable and reliable basic support for the research on comfort and air conditioning energy efficiency.

[0103] Of course, for those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, but also includes the same or similar methods that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description.

[0104] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0105] The technical parts not described in detail in the present invention are all well-known technologies.

Claims

1. A method for calculating air conditioning energy efficiency ratio based on comfort, characterized in that: The air conditioning energy efficiency ratio COP is calculated by the following formula: Under refrigeration conditions: COP=2.012-0.066T 室外干 +0.118T 室内空 ; Under heating conditions: COP=3.628-0.037T 室内空 +0.051T 室外湿 ; Where: T 室外干 Indicates the outdoor air dry bulb temperature, unit: °C; T 室内空 Indicates the indoor air temperature, unit: °C; T 室外湿 Indicates the outdoor air wet bulb temperature in °C.

2. A refrigeration system, wherein the refrigeration system applies the air conditioning energy efficiency ratio calculation method based on comfort as described in claim 1, characterized in that: The invention comprises a bench compressor (10), an oil separator (20), a first switch valve V1, a condenser (30), a second switch valve V2, a liquid storage device (40), a subcooler (50), a drying filter (60), a flow meter F, a pre-valve temperature and pressure measuring point, a throttling expansion valve MV, a third switch valve V3, a fourth switch valve V4, an indoor unit (70), a fifth switch valve V5, an outlet temperature and pressure measuring point, a sixth switch valve V6 and an intake temperature and pressure measuring point, which are arranged in sequence along the refrigerant travel path and then return to the bench compressor (10), thereby forming a main line; and further comprises a first branch and a second branch, wherein the first branch is connected in series with a seventh switch valve V7 and an inlet temperature and pressure measuring point in sequence, and the pipe openings at both ends of the first branch are respectively connected to the oil separator. The invention relates to a main pipe section between the separator (20) and the first switch valve V1 and one end of the main pipe section between the third switch valve V3 and the fourth switch valve V4; an eighth switch valve V8 is arranged on the second branch, and the two end pipe openings of the second branch are respectively connected to a section of the main pipe section between the second switch valve V2 and the liquid storage device (40) and a section of the main pipe section between the outlet temperature and pressure measuring point and the sixth switch valve V6; and also includes a heat load simulation module (80), the inlet of the heat load simulation module (80) is connected to a section of the main pipe section between the throttling expansion valve MV and the third switch valve V3 through a ninth switch valve V9, and the outlet is connected to a section of the main pipe section between the sixth switch valve V6 and the intake temperature and pressure measuring point through a tenth switch valve V10.

3. The refrigeration system according to claim 2, characterized in that: The heat load simulation module (80) includes a heat exchange coil (81), and relies on a heating coil (82) to achieve a heating operation on the heat exchange coil (81), and relies on a cooling coil (83) supplied by a water-cooled compression condensing unit to achieve a cooling operation on the heat exchange coil (81).

4. The refrigeration system according to claim 2, characterized in that: A first electromagnetic switch valve SV1 is arranged at the outlet of the bench compressor (10), and a second electromagnetic switch valve SV2 is arranged at the outlet of the drying filter (60).

5. The refrigeration system according to claim 2, characterized in that: Primary filters (90) are provided at the inlet and outlet of the bench compressor (10).

6. The refrigeration system according to claim 2, characterized in that: An eleventh switch valve V11 and a twelfth switch valve V12 are arranged at the inlet and outlet of the oil separator (20) respectively.

7. An experimental chamber, wherein the refrigeration system according to claim 2 is applied to the experimental chamber, characterized in that: The invention comprises an outer cabin (100) and an isolation room located in the outer cabin (100), wherein the isolation room constitutes an indoor room (a), and the space between the isolation room and the outer cabin (100) forms an outdoor simulation room (b); a spray device (110) having a simulated rain and / or snowfall environment is arranged on the top of the outdoor simulation room (b), and an infrared radiation lamp (120), a local blowing device (130), a simulated wet load module (140) and an outdoor air handling unit (150) are also arranged in the outdoor simulation room (b); a floor heating module (160) for heating is arranged in the indoor room (a); and the invention also comprises a fresh air duct (170), wherein one end of the fresh air duct (170) is connected to the indoor room (a), and the other end of the fresh air duct (170) sequentially passes through the isolation room and the outer wall of the outer cabin (100) and is connected to the external environment.

8. The experimental chamber according to claim 7, characterized in that: The outdoor air handling unit (150) comprises a fan (151), a humidifying coil (152), a rear electric heating module (153) and an evaporating coil (154).

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