69 results about "Solar heating system" patented technology

The utility model discloses a heat pump heat supply device and a solar heating system comprising the heat pump heat supply device in the field of thermal devices, which comprise a compressor, an evaporation heat exchanger, a condensation heat exchanger, an expansion valve, a medium inlet, a medium outlet, a water supply port and a water return port, the output end of the heating circulating pump is connected with a water supply port, and the evaporation heat exchanger comprises an evaporator refrigerant inlet, an evaporator refrigerant outlet connected with an air suction port of the compressor, an evaporator water inlet connected with the output end of the evaporation side circulating pump and an evaporator water outlet communicated with a medium outlet. The condensing heat exchanger comprises a condenser refrigerant inlet connected with the compressor exhaust port, a condenser refrigerant outlet communicated with the evaporator refrigerant inlet, a condenser water inlet communicated with the water return port and a condenser water outlet connected with the water supply port, and the medium outlet is communicated with the water return port. According to the utility model, the problem of heating under the condition that the temperature of the heat storage water tank is lower can be solved.

The invention discloses a structure for consolidating and reinforcing a soft foundation through solar heat and an operation mode of the structure. The structure comprises a soft foundation drainage consolidation system, a solar heating system, a vacuum pressure system, a water filling pipe bag load increasing structure, a stacking structure and a foundation soil layer. The lower part of the soft foundation drainage consolidation system is inserted into the foundation soil layer, and the upper part of the soft foundation drainage consolidation system is arranged on the top surface of the foundation soil layer; the solar heating system and the vacuum pressure system are respectively connected with the soft foundation drainage consolidation system; the stacking structure and the water filling pipe bag load increasing structure are sequentially arranged on the upper portion of the soft foundation drainage consolidation system from bottom to top, the vacuum pressure system is arranged on the top face of the stacking structure, and the solar heating system is arranged on the top face of the foundation soil layer. The deep soft foundation is reinforced through combination of the drainage wall, a common drainage plate and solar thermal consolidation, the reinforcing effect is good, and the method is economical.

The invention discloses a discharged water temperature abnormity identification and emergency processing method, device and equipment and a storage medium, and the method comprises the steps: collecting dam front vertical water temperature data, synchronously integrating data of a water quality sensor and a meteorological station, building a three-dimensional dynamic water temperature digital twinborn model based on a numerical model, real-time mapping and simulation of the fluid-heat-solid coupling effect of the reservoir area are achieved; setting a basic threshold according to a downstream ecological target, generating a dynamic threshold interval in combination with a seasonal probability distribution model, a meteorological disturbance factor and a water quality association rule, and dividing into multi-stage early warning according to water temperature deviation; when a preset early warning level is triggered, the digital twinborn model automatically adjusts the position of layered water taking equipment, a tail water mixing device or a solar heating system is started, and an ecological water supplementing strategy is linked; future water temperature changes are rehearsed through a digital twinborn model, and multiple sets of regulation and control plans are generated. According to the invention, a'monitoring-analysis-decision-execution 'full-closed-loop system is constructed, and accurate recognition and efficient processing of abnormal water temperature are realized.

The invention belongs to the technical field of heat storage systems in solar heating systems, and particularly relates to a composite phase change material and a preparation method and application thereof. The composite phase change material is prepared from the following components in percentage by mass: 4% of expanded graphite, 1%-5% of modified expanded graphite and the balance of 1-octadecanol, totaling 100%, the modified expanded graphite is expanded graphite modified by an aluminate coupling agent. Through the synergistic effect of the modified expanded graphite and the expanded graphite, the heat transfer performance of the composite phase change material can be effectively improved; after 200 times of thermal cycles, the phase change temperature and phase change latent heat of the composite phase change material are almost unchanged, and the composite phase change material shows good thermal cycle stability.

The invention relates to an emergency ecological pond pretreatment system for a constructed wetland, which comprises: a facultative anaerobic zone used for enabling a water body to enter a facultative anaerobic environment for denitrification reaction; the filler aeration area is connected with the facultative anaerobic area through a water inlet gate, and biodegradable organic pollutants in the water body are removed through the combined action of oxygenation and microorganisms; the settling zone is connected with the filler aeration zone and comprises a sludge treatment system; the water outlet area is communicated with the settling area and is used for lifting outlet water to each subsurface flow wetland treatment unit through a lifting pump; wherein a solar heating plate is arranged at the upper parts of the facultative area and the filler aeration area, so that a closed area is formed and is used for heating a water body. By adopting a form of combining with the constructed wetland, the problem that the quality of effluent of the constructed wetland is unstable is solved, meanwhile, the solar heating system is additionally arranged to heat a water body, the dependence of the water quality improvement effect of the constructed wetland on the temperature can be reduced, the occupied area is greatly reduced, and great market application prospects are achieved.

A pool system may include a solar heating system for heating water of a swimming pool or spa comprising. The solar heating system includes a collector which may receive water from the swimming pool or spa and heat a flow of water from the swimming pool or spa using solar radiation. The solar heating system includes one or more control devices, which may control a flow rate of water through the solar heating system and / or a pressure of water through the solar heating system.

The invention relates to a solar heating system (100), characterized in that it comprises: a solar water heater with integrated collector and storage (50, 51), including a water storage tank (50a, 51a) with a cold water inlet (50b, 51b) and a hot water outlet (50c, 51c), and a transparent surface (50d, 51d); a vacuum tube solar collector (40, 41), including a head collector (40a, 41a) with a cold heat transfer fluid inlet (40b, 41b) and a hot heat transfer fluid outlet (40c, 41c), and a plurality of vacuum tubes (40d, 41d), connected to the head collector (40a, 41a), containing a heat transfer fluid. The vacuum tubes (40d, 41d) extend above the transparent surface (50d, 51d), and the solar water heater with integrated collector and storage (50, 51) includes an internal heat exchanger (60, 61). Figure for the abstract: Figure 1

The utility model provides a double-heat-source heat pump air conditioning system. The utility model discloses a double-heat-source heat pump air-conditioning system. The air-conditioning system comprises a solar heating system, a cascade air-conditioning system, a geothermal source heating system and a user side energy supply system, wherein the solar heating system exchanges heat with the cascade air conditioning system, and the cascade air conditioning system exchanges heat with the user side energy supply system, so that heat obtained by the solar heating system is transferred to the user side energy supply system; and the geothermal source heating system exchanges heat with the cascade air conditioning system. The double-heat-source heat pump air-conditioning system can effectively improve the heat exchange efficiency of solar energy and a geothermal source, provides hot water with higher temperature for users, and meets the use requirements of the users.

The invention belongs to the technical field of trough type solar heat supply, and particularly relates to a trough type solar heat supply system based on a water working medium, which comprises a cold water tank, a water inlet pipe communicated with external cold water supply is arranged at one end of the cold water tank, and a circulating water pipe communicated with the inside is fixedly mounted at one end, far away from the water inlet pipe, of the cold water tank. A filter, a circulating water pump and an electric control valve are sequentially mounted on the circulating water pipe, and a plurality of groove type heat collectors are mounted on the circulating water pipe; a water medium circulates into the groove type heat collector or the electric heater through the circulating pump to achieve temperature rise, hot water is extremely prone to being close to a boiling state due to the fact that the heating target temperature or the altitude of part of areas is high, water vaporization in the state can cause unstable pressure in the system, and heating is not stable. And aggregation of the bubbles in the heat collecting pipe can cause the problems of heat exchange efficiency reduction, non-uniform temperature and the like.

The utility model belongs to the technical field of trough type solar heat supply, and particularly relates to a trough type solar heat supply system based on a water working medium, which comprises a cold water tank, one end of the cold water tank is provided with a water inlet pipe communicated with external cold water supply, and one end of the cold water tank far away from the water inlet pipe is fixedly provided with a circulating water pipe communicated with the inside. A filter, a circulating water pump and an electric control valve are sequentially mounted on the circulating water pipe, and a plurality of groove type heat collectors are mounted on the circulating water pipe; water media circulate into the groove type heat collector or the electric heater through the circulating pump to achieve temperature rise, hot water is extremely prone to be in a boiling state due to the fact that the heating target temperature or the altitude of part of areas is high, and water vaporization in the state can cause unstable pressure in the system. And aggregation of the bubbles in the heat collecting pipe can cause the problems of heat exchange efficiency reduction, non-uniform temperature and the like.

System (100) for a solar thermal storage capsule, wherein the system (100) comprises: a Scheffler solar concentrator (102) configured to direct concentrated solar flux onto a container of water; and a heat storage capsule comprising a shell enclosing a removable tube (104) arranged in a cantilever configuration, the removable tube containing a phase-change material (106), wherein heated water from the receiver transfers heat energy to the phase change material (106) to store latent heat during a charging phase, and wherein the removable tube (104) is removable to release the stored heat energy to heat water when no solar energy is available.

The utility model discloses a biomass-assisted solar heating system, and belongs to the technical field of biomass-assisted solar heating. The device comprises a heat storage water tank, wherein the connecting end of the heat storage water tank is respectively communicated with an outdoor solar circulating system and a heat plate heat exchange circulating system. According to the utility model, the heat storage water tank, the outdoor solar circulating system, the heat plate heat exchange circulating system, the outdoor solar heat collecting pipe, the solar circulating pump, the heat plate heat exchanger, the heat plate heat exchange circulating pump, the indoor heat dissipation circulating system, the biomass boiler, the light heating circulating pump and the indoor heating radiator or floor heating are matched; heat collected by solar energy can be mainly used when sunlight is sufficient in the daytime, and in cloudy and rainy days or at night, a biomass boiler is used for assisting a solar system to provide needed heat for a building together.

1. The name of the design product: solar heating intelligent controller. 2. The use of the design product: for the normal operation and temperature adjustment equipment of the solar heating system temperature and auxiliary equipment. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to a solar heat supply system design method and device, electronic equipment and a storage medium, and the method comprises the steps that heat collection characteristic parameters are determined, and a heat collection characteristic parameter set containing a plurality of heat collection characteristic parameters is obtained; determining energy storage characteristic parameters, and obtaining an energy storage characteristic parameter set comprising a plurality of energy storage characteristic parameters; obtaining a plurality of characteristic parameter combinations based on the heat collection characteristic parameter set and the energy storage characteristic parameter set; determining a performance combination corresponding to the feature parameter combinations based on the feature parameter combinations and the heat income and expenditure data obtained hourly; determining an annual cost value meeting functional and economic standards and reaching a single solar energy assurance rate, obtaining a candidate characteristic parameter combination corresponding to each solar energy assurance rate, and obtaining a target characteristic parameter combination corresponding to a target solar energy assurance rate; based on the target characteristic parameter combination and the building area, the heat collector area and the water tank volume are determined, and the accuracy of determining the heat collector area and the water tank volume is improved.

The utility model discloses an intelligent sewage treatment system for plateau alpine regions, which comprises a pre-treatment system, a plurality of anaerobic tanks, a biochemical tank, a water collecting tank and a post-treatment system which are positioned below an overburden layer and are arranged side by side, and a biogas heating system, a solar heating system and a breeze power generation heating system are arranged above the overburden layer. A liquid inlet pipe in the biogas heating system is communicated with the treatment tank in the pretreatment system, a liquid outlet pipe is communicated with the front end of the anaerobic tank, the biogas heating system collects biogas generated in the anaerobic tank, heat energy is generated through combustion, liquid entering from the liquid inlet pipe is heated, and the liquid flows out through the liquid outlet pipe after being heated; a water inlet pipe and a water outlet pipe of the solar heating system are respectively communicated with the water collecting tank and the anaerobic tank; and the breeze power generation heating system supplies heat energy to the interior of the anaerobic tank through electrification. The temperature during sewage treatment is automatically and intelligently controlled, so that the sewage temperature is suitable for microbial activity, and the device can normally operate in winter in high-cold and high-altitude areas.

The invention provides a heat storage tank applied to a solar heating system and a preparation method of a high-thermal-conductivity composite phase-change material.The heat storage tank comprises a tank body, a horizontal heat exchange top plate is fixedly arranged at the upper end of the interior of the tank body, and a horizontal heat exchange bottom plate is fixedly arranged at the lower end of the interior of the tank body; a heat storage bin is arranged between the heat exchange top plate and the heat exchange bottom plate, and a heat exchange pipeline is arranged in the heat storage bin; the heat storage bin is filled with a high-thermal-conductivity composite phase change material, and the high-thermal-conductivity composite phase change material is prepared by compounding a phase change material and a high-thermal-conductivity adsorption material; a heat medium inlet is fixedly formed in the top end of the heat storage tank, and a heat medium outlet is fixedly formed in the bottom end of the heat storage tank. According to the heat storage tank, more suitable high-heat-conduction adsorption materials are selected to be compounded with phase change materials, and through the special internal structure design of the heat storage tank, the heat storage efficiency and the overall performance of the system are remarkably improved, and the problems that the heat conduction performance is poor, and the heat storage density is low are solved.

An efficient and energy-saving series solar heating system includes a water storage tank, a circulation pipe, a heater unit, a stop valve, and a circulation water pump; the water outlet end of the circulation pipe is arranged at the bottom end of one side of the water storage tank and is connected to the side wall surface of the water storage tank; the return water end of the circulation pipe is arranged at the middle end of one side of the water storage tank and is connected to the side wall surface of the water storage tank; a plurality of heater units are arranged in an array, two adjacent heater units are arranged end to end through the circulation pipe, and a plurality of heater units are arranged in series through the circulation pipe; the stop valve is arranged at the return water end of the circulation pipe; the circulation water pump is arranged at the return water end of the circulation pipe and is arranged on one side of the stop valve. The present invention can adjust the number of heater units, perform modular assembly, and the assembly process is simple; a single heater unit has a large heat exchange area and high heat exchange efficiency.

The invention provides a solar heat supply system, which relates to the technical field of photovoltaic thermal power, and comprises a heat collector, a water pump and a heat exchanger which are arranged on a heat collection loop; the control module is connected with the temperature detection device, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the water pump, and the control module is used for controlling the temperature of the water pump according to temperature data detected by the temperature detection device in combination with an anti-freezing control strategy. And the opening and closing states of the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve and the operation state of the water pump are controlled. The electromagnetic valve and the water pump are controlled through the control module based on the temperature, accurate anti-freezing control is achieved, pipeline freezing is avoided, and the operation efficiency of the heat supply system is improved.

The utility model relates to a solar heating system, in particular to the technical field of solar heating anti-freezing, in particular to a heating anti-freezing system of an all-glass vacuum tube heat collector, which solves the problem of over-high anti-freezing energy consumption, improves the anti-freezing capability, ensures the system stability and improves the anti-freezing effect. Comprising a solar heat collector, a buffer water tank, a heat collection circulating pump and an electric three-way valve, a water inlet of the buffer water tank is communicated with an outlet of the solar heat collector through a water supply pipeline, a water outlet of the buffer water tank is sequentially communicated with an inlet of the heat collection circulating pump and an inlet of the electric three-way valve, and a first outlet and a second outlet of the electric three-way valve are jointly communicated with a water return pipeline through a first branch and a second branch respectively. The other end of the water return pipeline is communicated with a water return port of the solar heat collector; a check valve is arranged on the first branch, and the buffer water tank communicates with a heating tail end through a heat supply circulation pipeline.

This utility model discloses an auxiliary heat source device for a solar heating system, including a collector manifold and collector pipes. One end of the collector manifold has a first outlet pipe, which is connected to the heating network via a four-way connector. One end of the four-way connector is connected to an electric water heater via a first water supply pipe, and the other end is connected to a gas water heater via a third water supply pipe. On cloudy or snowy days, the collector pipes and collector manifold are not used. Water in the tank flows along a second water supply pipe to the electric water heater for heating. Hot water from the electric water heater flows along the first water supply pipe to the heating network for heating. Water in the tank flows along a fourth water supply pipe to the gas water heater for heating. Hot water from the gas water heater flows along the third water supply pipe to the heating network for heating, ensuring continuous heating from the heating network and guaranteeing people's normal lives.

The invention belongs to the technical field of animal husbandry breeding sheds, and provides an animal husbandry shed integrating phase change energy storage and solar heat supply, which comprises a phase change energy storage system, a solar heat supply system, a soil heat storage system and a heat preservation shed, the solar heat supply system is connected with the soil heat storage system and used for transferring heat to the soil heat storage system and the phase change energy storage system. The soil heat storage system is located below the heat preservation shed. The solar heat supply system is arranged at the top of the heat preservation shed; according to the animal husbandry shed integrating phase change energy storage and solar heat supply, the phase change energy storage system, the solar heat supply system and the soil heat storage system are integrated, the energy utilization efficiency is improved, the operation cost is reduced, the environmental conditions in the animal husbandry shed are remarkably improved, and a more comfortable environment is provided for growth of animals.

An automatic anti-freezing solution supplementing device for a solar heating system is integrally a three-way shell, the three-way shell comprises a straight pipe and a branch pipe, an inner cavity of the straight pipe is communicated with an inner cavity of the branch pipe, and two ports of the straight pipe are an inlet and an outlet respectively. The end opening of the branch pipe is a pressure guiding opening, a control cavity and a valve element are sequentially arranged on the pressure guiding opening inwards, the control cavity drives the valve element to reciprocate in the axial direction of the branch pipe, and when the valve element moves to the lowest point in the straight pipe, the inlet is closed. Through reasonable arrangement of component structures, an outlet of the pressure difference control valve and a pressure guide opening are connected with a water pipe, and pressure in a straight pipe and a control cavity is adjusted according to pressure of the water pipe, so that the control cavity drives a valve element to reciprocate in the axial direction of a branch pipe, start and stop of an automatic anti-freezing solution supplementing device are controlled, and pipe network pressure is maintained within a set working condition; the heat supply quality of the system is guaranteed, the overall structure is simple, cost is low, and operation is easy; the problems that a hot water supply system is poor in stability, and an existing self-control water supplementing system is complex in operation and high in cost are solved.

The invention relates to a solar heating system (100), characterized in that it comprises: a solar water heater with integrated collector and storage (50, 51), including a water storage tank (50a, 51a) with a cold water inlet (50b, 51b) and a hot water outlet (50c, 51c), and a transparent surface (50d, 51d); a vacuum tube solar collector (40, 41), including a head collector (40a, 41a) with a cold heat transfer fluid inlet (40b, 41b) and a hot heat transfer fluid outlet (40c, 41c), and a plurality of vacuum tubes (40d, 41d), connected to the head collector (40a, 41a), containing a heat transfer fluid. The vacuum tubes (40d, 41d) extend above the transparent surface (50d, 51d), and the solar water heater with integrated collector and storage (50, 51) includes an internal heat exchanger (60, 61). Figure for the abstract: Figure 1

The utility model discloses a solar heating system, and belongs to the technical field of heating. The utility model solves the problem that the maintenance cost of the whole system is increased due to frost crack of a solar hot water pipeline easily caused by the influence of cold weather in winter when solar hot water is used for heating in northern areas at present. A solar heat collection device is connected with a cold and hot air conversion box, the cold and hot air conversion box is connected with a home-entry fan, the home-entry fan is connected with a hot air distribution header, and the hot air distribution header is respectively connected with a direct blowing nozzle, a hot air storage tank, a hot air heater, a hot air floor heater, a hot air indoor partition wall and a hot air indoor gable wall. The hot air storage tank, the hot air heater, the hot air floor heater, the hot air indoor partition wall and the hot air indoor gable wall are connected with the indoor cold air combiner box, the indoor cold air combiner box is connected with the cold air fan, and the cold air fan is connected with the cold and hot air conversion header. The heat supply system cannot be damaged in a low-temperature environment, and is low in operation cost and maintenance cost.

The utility model relates to a regional comprehensive energy heat supply system based on multi-energy complementation, which comprises a hot water supply main pipeline, a solar heating system, a heat pump system, a gas / fire coal heating system and an electric heating system, and is technically characterized in that the electric heating system is connected with a wind power generation system; the solar heating system, the heat pump system, the fuel gas / fire coal heating system and the electric heating system are sequentially used for heating, in the process, the solar heating system and the heat pump system serve as clean energy for preheating, the fuel gas / fire coal heating system and the electric heating system strengthen heating, and high-temperature heat supply is achieved. And the temperature of the hot water shunted from the third shunting pipeline, the second shunting pipeline and the first shunting pipeline is sequentially reduced, and the hot water can be shunted to different demand areas, so that different heat supply according to specific heat energy demands is realized, the heat supply pressure is reduced, and heat energy waste is avoided.

A system for providing supplemental heating to a hot water heater and an electric heat pump includes a solar thermal collector, a solar thermal storage vessel, a first water circulating system, a second water circulating system, and a controller. The first water circulating system circulates water between the solar thermal storage vessel and the solar thermal collector. The second water circulating system circulates heated water between the solar thermal storage vessel, the hot water heater, and a heat exchanger associated with the heat pump. The controller is configured to cause water circulation between the hot water heater and the solar thermal storage vessel so as to raise a temperature of water in the solar thermal storage vessel and / or in the hot water heater, and to cause circulation of heated water from the hot water heater to the heat exchanger to provide auxiliary heat for the heat pump.

The invention discloses an integrated solar heating system and relates to the technical field of solar energy utilization, the integrated solar heating system comprises a heating system and a control box, the heating system comprises a water tank, a liquid level pipe is arranged on one side of the water tank, a first pipeline, a second pipeline and a third pipeline are arranged on the other side of the water tank, the first pipeline is connected with tap water through a third electric gate valve, and the second pipeline is connected with a heat exchanger; a fourth pipeline, a fifth pipeline and a sixth pipeline are arranged on the heat exchanger, the fifth pipeline is connected with a solar two-way vacuum heat collecting pipe, the solar two-way vacuum heat collecting pipe is connected with the heat exchanger through the sixth pipeline, a water supplementing tank is installed on the fifth pipeline, a rack circulating pump is installed on the sixth pipeline, and the third pipeline is connected with a household boiler through a first electric gate valve. The household boiler is connected with the radiator through the seventh pipeline. The fourth pipeline is connected with the radiator through the circulating heat pump. Compared with the prior art, the integrated solar heating system has the advantages of being compact in structure, small in occupied area and convenient to install and maintain.

The utility model provides a shell type low-temperature nuclear reactor coupling solar heating system, and belongs to the technical field of new energy and renewable energy application. In the shell type low-temperature nuclear reactor coupling solar heating system, a steam outlet of a steam turbine in a power generation system, a condenser, a steam generator, a superheater and a steam inlet of the steam turbine are sequentially connected, the steam turbine is connected with a power generator and supplies power to the power generator, and a nuclear energy heating system is connected with the steam generator. The solar heating system is connected with the superheater and can heat the saturated steam in the superheater into superheated steam, the heat supply system comprises a heat exchanger, the heat exchanger is provided with a hot water channel and a cold water channel, an inlet of the hot water channel is communicated with a steam extraction outlet of the steam turbine, and an outlet of the cold water channel is communicated with a steam extraction outlet of the steam turbine. An outlet of the hot water channel communicates with an outlet of the condenser. The cold water channel communicates with the heat exchange station. The heat supply system is arranged, so that the energy utilization rate of the whole system can be fully utilized.

The utility model relates to a coupling phase change heat storage heating system, which comprises a coupling heat storage box, a solar heating system, a heat pump heating system and an electric heating system, and has the technical key points that the coupling heat storage box comprises a circular box body, a box cover, and a first concentric partition, a second concentric partition and a third concentric partition which are sequentially arranged in the circular box body from inside to outside; the first heating area, the second heating area and the third heating area are used for storing water and heat, and a solar heating system, a heat pump heating system and an electric heating system are used for achieving coupling phase change heating and heat storage of the first heating area, the second heating area and the third heating area through a multi-ring-shaped design structure. And the heating water can be finally conveyed to the heating water output pipeline through the first branch, the second branch and the third branch. When rapid heating is needed, the first heating area is rapidly heated through the electric heating system, heating water is output through the first branch, and the direct heating requirement is met. Under the condition of meeting heat storage and rapid heating, the system is convenient to switch, small in switching part and long in maintenance period.

The present invention relates to a transportable sargassum drying machine that comprises several subsystems incorporated to achieve the objective of the invention. These subsystems consist of transportation and stabilization, a solar heating system that includes cylindrical parabolic solar heaters that heat thermal oil up to a temperature of 330° C.; hot air generation, which is directed to the conveyor belt and buckets to dry the sargassum; a drying process in which hot air from the radiators passes through the conveyor belt, evaporating moisture from the sargassum as it is transported; a multi-stage conveyor belt system with three conveyor belts, achieving a moisture content of 14% or less; a packing process where the sargassum is transported to a packing machine for shipping and transport; and power supply, where the machine's electrical devices are powered by photovoltaic solar panels attached to the side walls of the trailer.