32 results about "Longwave radiation" patented technology

The invention discloses a mesoscale numerical simulation method for climate effect evaluation of an onshore centralized photovoltaic power station. The mesoscale numerical simulation method comprises the following steps of: preprocessing multisource meteorological observation data of the onshore centralized photovoltaic power station; performing surface short-wave radiation parameterization by using comprehensive albedo and photoelectric conversion efficiency; performing direct explicit numerical parameterization on heat-sensitive flux by using wind speed, air density and short-wave radiation; performing latent heat flux, soil heat flux and long-wave radiation parameterization by using a difference comparison method; carrying out parameterization on the dragging effect of a photovoltaic panel by utilizing dynamic roughness; and quantitatively evaluating the climate effect of the photovoltaic power station through a sensitivity numerical simulation test. According to the method, the objective quantitative evaluation problem of the climate influence of the large photovoltaic power station is solved; and the simulation method has relatively high universality. By adopting the method, post-evaluation can be carried out on the climate effect of the built photovoltaic power station, pre-evaluation can be carried out on the climate effect of the power station to be built, and a basis is provided for site selection and construction of a climate-friendly power station.

The invention relates to a long-wave downlink radiation estimation method under cloudy days, a computer storage medium and electronic equipment, and the method comprises the steps: setting the weatherconditions of cloudy days, obtaining a simulation library through simulation according to the weather conditions, and building an estimation parameterization model based on the simulation library; acquiring the cloud top temperature, the cloud top height, the atmospheric total moisture content, the surface temperature and the surface emissivity by remote sensing; according to the cloud top temperature, the cloud top height, the atmospheric total water vapor content, the surface temperature and the surface emissivity which are obtained through remote sensing, estimating long-wave downlink radiation under cloudy days through an estimation parameterization model. According to the invention, an estimation parameterization model is established according to weather conditions; long-wave downlink radiation under cloudy days is estimated according to the model and the acquired cloud top temperature, cloud top height, atmospheric total moisture content, surface temperature and surface emissivity, calculation of long-wave downlink radiation under cloudy days is realized, and the defect that long-wave radiation under cloudy days cannot be effectively inverted in the prior art is overcome.

The invention discloses a pre-earthquake infrared long wave radiation (OLR) abnormal information detection method based on an autoregressive moving average model time sequence prediction model (ARIMA). According to the method, the precision of predicting the reference background value is obviously superior to that of a classical time sequence prediction model; particularly, the time sequence prediction precision becomes an important evaluation index of prediction performance, the fitting effect of a time sequence prediction model is directly related to the precision of a prediction result, andthe result has an important influence on subsequent infrared OLR abnormal information detection. Moreover, aiming at the problem that a classical time sequence prediction model method has defects inthe aspect of determining upper and lower thresholds, the method provides a relatively reasonable threshold determination strategy, so that an abnormal result detected by utilizing a high-precision reference background value and the reasonable upper and lower thresholds and an obtained conclusion are more reasonable.

The invention belongs to the field of fluorescent powder, and discloses gadolinium oxide-based up-conversion luminescence fluorescent powder and a preparation method thereof. The fluorescent powder has a molecular formula of Gd2O3:xTb<3+>, yHo<3+>, wherein Tb<3+> is an active ion, and is used as a luminescence center of the material, Ho<3+> is a sensitized ion, and can absorb energy and transfer energy to the Tb<3+> ion, x ranges from 0.002 to 0.06, y ranges from 0.002 to 0.04. The gadolinium oxide-based up-conversion luminescence fluorescent powder of the invention belongs to terbium holmium codoped Gd2O3:xTb<3+>, yHo<3+> up-conversion fluorescent powder; the fluorescent powder can realize long-wave radiation excitation from infrared light to green light, and the obtained 485 nm luminescence peak corresponds to the 5D4-7H6 transition radiation luminescence of the Tb<3+> ion.

The invention discloses a building material surface radiation absorption coefficient calculation method considering long and short wave difference, which comprises the following steps: S1, putting a building material test piece wrapped by a thermal insulation box in a surrounding open and unshielded natural environment, and establishing a thermal boundary equilibrium equation when only the upper surface of the building material test piece is in contact with the surrounding environment; s2, recording related data; s3, selecting a certain time period in the time section of continuous heating or continuous cooling of the building material test piece, and calculating the thermal change quantity Qs, the convective heat exchange quantity Qc and the thermal radiation quantity Isr of the building material test piece; s4, in a natural environment which is cloudy and rain-free at night and is open and free of shielding, the quantity of direct solar radiation and scattered solar radiation is zero, and the long-wave radiation absorption coefficient of the outer surface of the building material test block is calculated through a transformation formula; and S5, selecting system heat exchange in a certain time period in a natural environment which is sunny in the daytime and is open and unshielded in the surrounding, recording related data, and calculating the short-wave radiation absorption coefficient of the building material test piece.

The invention relates to a clear sky surface net long wave radiation integrated inversion method and system, and the method comprises the steps: firstly carrying out the processing of an MODIS long-time sequence data set and a surface long wave radiation measured data set of each actual measurement site in a plurality of actual measurement sites, so as to construct a total data set; and training the initial inversion model according to the data set to obtain an inversion model. And finally, taking the atmospheric top amplitude brightness and column water vapor content of the 29th, 31st and 32th wavebands of the MODIS at the position to be inverted as the input of an inversion model, and performing inversion to obtain clear sky surface net long wave radiation, thereby performing integrated inversion on the clear sky surface net long wave radiation. The method does not need to calculate clear sky surface net long-wave radiation after respectively inverting the surface upward long-wave radiation and the surface downward long-wave radiation, and can remarkably improve the inversion precision of the clear sky surface net long-wave radiation.

The invention discloses a device and method for testing emissivity of a pavement material, and belongs to the technical field of pavement material thermal radiation. The device and method aim at solving the technical problem that in the prior art, a standard testing method for the emissivity of the pavement material is lacked, and consequently a low-emissivity pavement or coating material cannot be selected preferably; a short-wave infrared light source irradiates a pavement material test piece, a long-wave radiation sensor detects long-wave radiation emitted by the pavement material test piece, and a radiation collecting instrument collects and processes data detected by the long-wave radiation sensor; and temperature sensor is arranged in the pavement material test piece, and a temperature collecting instrument collects and processes data detected by the temperature sensor. According to the device and method, the low-emissivity pavement or coating material can be selected preferablyby testing the emissivity of different pavement materials so as to relieve the heat island effect of a city; and the emissivity of a single pavement material can be tested, the emissivity of the testpiece containing a surface coating can be tested, and the applicability of the device and method is wider.

The invention belongs to the field of fluorescent powder, and discloses a molybdate matrix up-conversion luminescence fluorescent powder and a preparation method thereof. The fluorescence has a molecular formula: Me<1-x-y>MoO4:xTb<3+>,yHo<3+>, wherein Tb<3+> is an activating ion, Ho<3+> is a sensitizing ion, x is in a value range of 0.002 to 0.06, and y is in a value range of 0.002 to 0.04. The molybdate matrix up-conversion luminescence fluorescent powder provided by the invention belongs to terbium and holmium co-doped Me<1-x-y>MoO4:xTb<3+>,yHo<3+> up-conversion fluorescent powder; the fluorescent powder can achieved a long-wavelength irradiation from the infrared zone to the green light zone, and the obtained 485 nm of luminescent peak corresponds to the transition irradiation luminescence given off by Tb<3+> ions which transit from 5D4 to 7H6.

The invention discloses an emitted long wave radiation calculation method suitable for an AGRI instrument on an FY4A satellite. The emitted long wave radiation calculation method comprises the following steps of reading in IMAGER observation data; carrying out FY4-RTM mode simulation; carrying out statistical regression analysis, and exporting a regression coefficient; and calculating the long-wave radiation OLR emitted by the atmosphere top. The invention is suitable for the technical field of OLR calculation of meteorological satellites, OLR inversion is carried out by adopting multi-channel data, the influence of near-surface gas and water vapor on the radiation quantity can be better reflected, and the inversion precision is higher; meanwhile, channel information used in the method has extremely high correlation with OLR, by establishing a regression relation between satellite channel observation and OLR simulation, the atmospheric ejection long wave radiation flux-OLR is calculated according to the satellite channel radiance, limitation of an existing method is overcome, higher precision is obtained, meanwhile, the invention has a larger application range, and generalizability is high.

The invention provides Tm/Ho co-doped disulfide zirconium upconversion fluorescent powder, the chemical general formula of which is ZrS2: xTm<3+>, yHo<3+>, wherein ZrS2 is a substrate, Tm<3+> and Ho<3+> are doping ions, the value range of x is 0.002-0.06 and the value range of y is 0.002-0.04. The fluorescent powder can be excited by long-wave radiation from infrared rays to green light for blue-light short wave emission, so that the deficiencies of blue light materials in the existing luminescent materials can be overcome. The invention further provides a preparation method of the Tm/Ho co-doped disulfide zirconium upconversion fluorescent powder. The method can be used for preparing the Tm/Ho co-doped disulfide zirconium upconversion fluorescent powder which has the advantages of less surface defects, good degree of crystallinity and relatively intact crystal structure. In addition, the invention further provides an application of the Tm/Ho co-doped disulfide zirconium upconversion fluorescent powder in preparation of organic electroluminescence devices.

The invention discloses a light energy cascade power generation device and system for solar spectrum frequency division and residual light convergence and radiation coupling. The device divides solar spectrum radiation into two sections through a frequency division filter, the spectrum radiation with a shorter wavelength is matched with a first-stage photovoltaic cell, the spectrum radiation with a longer wave band is condensed through a light condenser after being reflected, and a structural absorber is heated. A structural absorber with an outer square column and an inner cylindrical cavity is specially designed so as to absorb long-wave radiation after frequency division. A radiator is arranged on the outer wall face of the structural absorber, and secondary photovoltaic cells are arranged on the periphery of the structural absorber. The whole system is formed by periodically arranging a plurality of devices and is supported by a periodic support, gradient conversion power generation of solar energy is achieved through solar radiation spectrum frequency division and residual light spectrum readjustment, and meanwhile the loss of the whole system in the light condensation process is reduced through the design method that frequency division is conducted firstly and then light condensation is conducted. The whole system conforms to the energy gradient utilization principle and has important application value.

The invention belongs to the field of phosphor powders, and discloses a neodymium-ytterbium codoped lanthanum fluoride upconversion phosphor powder and a preparation method thereof. The chemical formula of the phosphor powder is LaF3:mYb<3+>,nNd<3+>, wherein LaF3 is as matrix, Yb<3+> and Nd<3+> are ions of a luminescent center, m is in the range of 0.005-0.05, and n is in the range of 0.002-0.03. The neodymium-ytterbium codoped lanthanum fluoride upconversion phosphor powder can achieve exciting out blue light shortwave luminescence by longwave radiation. Therefore, the phosphor powder can make up blue light material deficiencies in conventional displaying and luminescent materials.

The invention provides a heat pump system achieving double-medium PVT coupling nocturnal radiation, a control method and an intelligent household electrical appliance. The heat pump system comprises afirst heat exchanger, an electronic expansion valve, an air source heat exchanger, a four-way reversing valve, a compressor, a PVT assembly and a heat storage water tank. The first heat exchanger isconnected with the compressor through the four-way reversing valve. The air source heat exchanger is connected with the four-way reversing valve. The air source heat exchanger is connected with the first heat exchanger, and the electronic expansion valve is arranged on a connecting pipeline of the air source heat exchanger and the first heat exchanger. The PVT assembly is connected with the air source heat exchanger and connected with the heat storage water tank. According to the heat pump system achieving double-medium PVT coupling nocturnal radiation, the control method and the intelligent household electrical appliance, by means of control of different operation modes, the functions of power generation, heating, refrigerating and hot water making are achieved; main energy of the systemis from solar radiation energy, long wave radiant energy in the sky and air energy, natural energy is fully utilized, and system energy consumption is reduced.

The invention belongs to the phosphor field, and discloses yttrium oxide phosphors for up-conversion luminescence, and a preparation method and an application thereof. The phosphors have a structural formula of Y2-x-yO3:xHo3+, yYb3+, wherein Ho3+ and Yb3+ are doping ions; x value ranges from 0.02 to 0.1; and y value ranges from 0.02 to 0.2. The yttrium oxide phosphors for up-conversion luminescence prepared by the invention can excite short-wavelength luminescence of blue light by long-wavelength radiation from infrared to green light, so that the phosphors can make up the insufficiency of blue light materials in present display and luminescent materials.

The invention discloses an anti-condensation radiation cooling device with multiple working modes. The anti-condensation radiation cooling device is characterized by comprising a reflecting plate (100), a first rotating connecting piece (200), a rotating shaft (300), a connecting structure (400), a second rotating connecting piece (500), a fixing structure (600), a metal pipe (700), a long-wave radiation transmitting pipe (800), sealing pieces (900) and a closed air layer (1000); the long-wave radiation transmitting pipe (800) is arranged at the outer side of the metal pipe (700), is not in direct contact with the metal pipe (700), and is coaxial with the metal pipe (700); the sealing pieces (900) are arranged at the two sides of the long-wave radiation transmitting pipe (800); and the metal pipe (700), the long-wave radiation transmitting pipe (800) and the sealing pieces (900) jointly surround the closed air layer (1000). The anti-condensation radiation cooling device solve the problem of condensation of a traditional radiation cooling system, switching between the global radiation cooling mode and the directional radiation cooling mode can be achieved, invalid radiation coolingis reduced, accurate utilization of radiation cooling capacity is achieved, and energy-saving significance is achieved.

The invention discloses a radiation transmission calculation method for processing solar radiation energy in the long-wave range. First, the short-wave and infrared radiation transmission equations are respectively solved to obtain the reflection and transmission functions of each layer of the atmosphere; The combined reflection and transmission functions of the multi-layer atmosphere are obtained from the reflection and transmission functions of the multi-layer atmosphere; finally, the radiation flux of the multi-layer atmosphere in the long-wave range is obtained from the joint reflection and transmission functions, and then the heating rate is obtained from the flux. The present invention adopts the accumulation method and superposition principle to deduce theoretically the long-wave radiation transmission scheme including solar radiation energy in the long-wave interval, and writes the FORTRAN program according to the theory, and designs a new radiation parameterization scheme to replace the original radiation parameterization in the model In this way, the radiation calculation error in the model can be reduced, the calculation accuracy can be improved, and the uncertainty of the radiation flux calculation can be reduced.