33 results about "Energy system design" patented technology

The invention discloses a calculating method for determining cooling and heating load of a building in a hot-summer and cold-winter zone by utilizing a pivot element decoupling method. Factors influencing the cooling and heating load of the building are divided into two main types: the self attribute parameter and the operation attribute parameter of the building. The calculation is conducted by the following steps: according to the indoor comprehensive heat dissipation power, calculating the benchmark of the cooling and heating load; according to the work and rest time in the building, calculating the radiation coefficient and the temperature difference coefficient; according to the orientation, the window-wall ratio, the external wall heat resistance and the window heat resistance of the building, calculating the correction factors of the orientation, the window-wall ratio, the external wall heat resistance and the window heat resistance in sequence; according to the coupling influence of the self attribute parameter and the operation attribute parameter, calculating the coupling influence factor; finally calculating the average cold and hot power of unit area of the building in summer (winter) and the cooling (heating) capacity in various time periods of a typical day. The calculating method can meet the precision requirements of engineering application, quickly and economically calculate the cooling and heating load of the typical building in the hot-summer and cold-winter zone, guide the distributed energy system design, and provide reference for system operation and optimization.

The invention discloses a rural residential building low-carbon energy system optimization method based on multi-objective optimization, and the method comprises the steps: building a rural building structure thermophysical property parameter and an internal energy system operation mode according to a rural typical building structure; based on the building structure parameters and the system internal energy operation mode, building energy requirements are obtained and comprise the air conditioner cold / heat load requirement, the electric load and the hot water load; establishing a mathematical programming model with the guidance of optimization design of a building energy system constructed by multi-objective optimization, and realizing a global optimal solution of the model through an optimization algorithm. Through the optimization method, a low-carbon sustainable energy system can be provided for rural residence construction, and compared with a traditional energy system design, the method gives consideration to economic benefits and low-carbon requirements, and has high application value.

The invention discloses a collaborative optimization comprehensive energy system design scheme obtaining method and system, and the method comprises the steps: determining the types and number of alternative equipment, and taking the total amount as the number of equipment during optimization; according to the number and the type of the equipment, determining the number and the type of variables including an equipment sequence, equipment capacity and operation parameters by using a unified model; based on the unified model of the equipment, expressing the structure of the comprehensive energysystem as a chain structure; performing simulating in a chain operation mode of a chain structure to obtain operation data, and solving variables to obtain a sorting result of equipment in the chain structure by taking a structure sequence, installed capacity and control parameters of the equipment as the variables and taking primary energy consumption, energy supply cost and carbon emission as targets; and obtaining a system design result according to the solving result. The invention discloses an integrated design method, and aims to fundamentally solve the problem of independent optimization failure caused by multi-equipment multi-working-condition, complex and variable structure and multi-energy-flow operation strong coupling.

According to the natural gas distributed energy region user cooling, heating and power load prediction method and system provided by the invention, on the basis of the climate characteristics of the target region and various urban functional buildings, the hourly cooling, heating and power load of the standard building model of each region is obtained through simulation calculation, so that in thenatural gas distributed energy system design and planning stage, according to the proportion of standard buildings in regional users, hourly cooling, heating and power load characteristics of the regional users are effectively predicted, accurate and reliable regional user load prediction data can be provided in the design and planning stage of the natural gas distributed energy system, and on the basis, an improved configuration scheme and an optimized operation strategy of the energy system are studied; and the advantages of high efficiency, economy, environmental protection and reliabilityof the distributed energy system are fully achieved.

The invention provides a data correction method of a high-altitude propeller wind tunnel test for influence of Reynolds number. The data correction method comprises the following steps: according to the similarity criterion of an advance ratio and a tip Mach number, experimental parameters of the high-altitude propeller scale model wind tunnel test are determined; the wind tunnel test of the propeller scale model is carried out; a tension coefficient experimental value C<T,exp> and a power coefficient experimental value C<P,exp> are measured; the tension coefficient experimental value and thepower coefficient experimental value are corrected; and a corrected propeller propulsion efficiency is calculated according to a propeller propulsion efficiency formula. The invention takes into account the difference between the Reynolds number experimental value under the condition of the equal advance ratio and the equal tip Mach number and the Reynolds number under the real working condition of the high-altitude propeller; more accurate aerodynamic performance experimental data such as the high-altitude propeller tension coefficient, the power coefficient and the propulsion efficiency is obtained by using the proposed correction method; so reliable basic data is provided for designing a propulsion system and an energy system of a high-altitude low-dynamic aircraft.

The invention belongs to the technical field of airplane local hydraulic energy system design, and particularly relates to an integrated hydraulic oil tank. The integrated hydraulic oil tank comprises a barrel, a piston, a gas-phase end plate, a corrugated pipe, an oil-phase end plate and a heat exchanger; the piston is arranged in the barrel and can axially slide along the barrel; the gas-phase end plate blocks one end of the barrel, and a gas cavity is formed between the gas-phase end plate and the piston; the corrugated pipe is arranged in the gas cavity, one end of the corrugated pipe is connected with the piston, the other end of the corrugated pipe is connected with the gas-phase end plate, and the corrugated pipe is filled with pressurized air; the oil-phase end plate blocks the other end of the barrel, and an oil cavity is formed between the oil-phase end plate and the piston; and the heat exchanger is arranged in the oil cavity and connected to the oil-phase end plate.

The invention provides a high-altitude propeller wind tunnel test data correction method aiming at the influence of a tip Mach number, which comprises the following steps of: determining test parameters of a wind tunnel test of a high-altitude propeller scaling model according to an advance ratio and a Reynolds number similarity criterion; performing the wind tunnel test on the propeller scaling model to obtain a tension coefficient test value C<T, exp> and a power coefficient test value C<p, exp>; and correcting the tension coefficient test value and the power coefficient test value, and calculating according to a propeller propulsion efficiency formula to obtain a corrected propeller propulsion efficiency. According to the high-altitude propeller wind tunnel test data correction method,the difference between a tip Mach number test value under the conditions of equal advance ratio and equal Reynolds number and a tip Mach number under the real working condition of a high-altitude propeller is considered, and the provided high-altitude propeller wind tunnel test data correction method is utilized to obtain accurate aerodynamic performance test data such as a tension coefficient, apower coefficient, a propulsion efficiency and the like of the high-altitude propeller, so that reliable basic data are provided for the design of a propulsion system and an energy system of a high-altitude low-dynamic aircraft.

The present invention discloses a method for design of photoelectric micro power system based on model analysis and pertains to the technical field of photoelectricity. According to the node composition and functional requirements of the integrated photoelectric micro power sensor, the present invention divides the sensor into four parts: energy conversion subsystem, energy storage subsystem, energy management subsystem and sensor nodes. The energy parameters of these four parts are analyzed. According to the power supply method to sensor nodes from the photoelectric micro power system, a design model for the relations between different energy parameters of the photoelectric micro power system is established. According to the functional requirements of the photoelectric micro power and theenvironmental features of the areas where micro power is used, system design parameters are determined. From system design parameters and micro power design model, the area of photovoltaic cell and the cell circuit of micro power system are determined, thus completing the design of integrated sensor photoelectric micro power system. The present invention uses a design model to greatly simplify system design process and establish a universal design method for the design of photoelectric micro power system.

The invention discloses an impact-resistance optimization design method of multilevel energy absorption of a railroad train. A one-dimensional longitudinal flexible dynamic model which can accuratelyreflects critical responses of the railroad train in a crash process is established, and mainly consists of a coupler contact end part unit, a rigid connection unit, a coupler spring element and a train body rod element. Main technology of the method includes longitudinal load-deformation feature extraction of a single-section train body, global optimization method-based reverse calculation of mechanical properties of stiffness and damping parameters of the simplified nonlinear train body rod element, establishment of a one-dimensional longitudinal flexible dynamic model of a whole-array formation and train energy absorption system parameter optimization process building. The method increases an accuracy rate of the one-dimensional simplified model on predicting train formation dynamic-response information, also greatly saves single-analysis machine time, solves the problem that synchronous optimization of energy absorption parameters of whole-formation trains is always limited by too-long consumed single-analysis time in the past, and can be used for crash energy system design and parameter optimization of a train design stage.

The invention discloses a calculation method for determining building cooling and heating loads in hot summer and cold winter regions by using a principal component decoupling method, and divides factors affecting building cooling and heating loads into two categories: building own attribute parameters and operating attribute parameters. Calculation is carried out according to the following steps: Calculate the benchmark of cooling and heating load based on the indoor comprehensive heat dissipation power; calculate the radiation coefficient and temperature difference coefficient based on the building’s work and rest time; Calculate their correction coefficients in turn; calculate the coupling influence coefficient according to the coupling influence of its own attribute parameters and operating attribute parameters; finally calculate the average cooling and heating power per unit area of ​​the building in summer (winter) season and the cooling ( heat) amount. The invention can not only meet the precision requirements of engineering applications, but also quickly and economically calculate the cooling and heating loads of typical buildings in hot summer and cold winter regions, guide the design of distributed energy systems, and provide a basis for system operation optimization.

The invention relates to the field of natural gas energy utilization, and concretely relates to a comprehensive energy utilization system for natural gas storage and peak shaving, and a gas storage and peak shaving method. The system comprises a crude oil reservoir, a natural gas refining unit, a natural gas storage reservoir and a natural gas utilization unit which are sequentially connected through pipelines; and the natural gas utilization unit comprises chemical production equipment, an urban natural gas pipe network and a power conversion unit. Compared with like systems and methods in the prior art, the system and the method of the invention have the following advantages: through unified design and comprehensive management of natural gas source storage and utilization, exchange and comprehensive utilization of various energy sources such as crude oil, natural gas, electric energy and heat energy are achieved, the energy utilization efficiency is improved, and a new scheme is provided for design of a distributed energy system.