Experimental optimization of the Si photovoltaic panels cooling system on maximum allowable temperature criteria

With the world’s energy crisis aggravation, the wind turbine technology is undergoing a rapid and continual development all over the world. At present, the increase of the single-system capacity is becoming a major trend of the development of the wind turbine technology, however, how to design a cooling system to keep the whole turbine working in a allowable temperature environment is a critical problem. In this paper, a cooling system of a 3MW wind-driven generator is given and numerical simulation is conducted at 100% load, and then an improvement structure is proposed according to the calculation results. The results show that the windings and stator teeth can be cooled down effectively by the improving method. The improving cooling system removes the over-temperature problem of high temperature zone and allows the temperature of the generator to be less than the limit of 120°C as required.

Download Full-text

Conceptual Thermosyphonic Loop Cooled Thermoelectric Power Cogeneration System for Automotive Applications

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.663.294 ◽

2014 ◽

Vol 663 ◽

pp. 294-298

Author(s):

Jason Sim ◽

Rozli Zulkifli ◽

Shahrir Abdullah

Keyword(s):

Thermoelectric Power ◽

Cooling System ◽

Heat Sinks ◽

Polar Solvents ◽

Cooling Systems ◽

Thermoelectric Modules ◽

Cogeneration System ◽

Evaporative Cooling System ◽

Allowable Temperature ◽

Better Than

Thermoelectric cogeneration may be applied to the exhaust of an automobile to generate additional electric power, by applying a temperature differential across the thermoelectric power generation modules. To obtain maximum net power, the highest allowable temperature difference should be obtained. Therefore, a cooling system should be employed to ensure that the cold side of the thermoelectric modules remain as cold as possible. An evaporative cooling system patented by Einstein and Szilard is used as a base for a non-parasitic cooling system to be used together with thermoelectric modules. The cooling system utilizes the same heat which powers the thermoelectric modules as a power source. By utilizing the high solubility of ammonia in water, the solubility dependency with temperature, and usage of polar and non-polar solvents to direct the flow of ammonia as a coolant, it is possible to create a cooling system which performs better than passive heat sinks, but negates the power requirements of active cooling systems.

Download Full-text

Combined Cooling and Power Management Strategy for a Standalone House Using Hydrogen and Solar Energy

Hydrogen ◽

10.3390/hydrogen2020011 ◽

2021 ◽

Vol 2 (2) ◽

pp. 207-224

Author(s):

Hugo Lambert ◽

Robin Roche ◽

Samir Jemeï ◽

Pascal Ortega ◽

Daniel Hissel

Keyword(s):

Fuel Cell ◽

Power Management ◽

Heat Pump ◽

Air Conditioning ◽

Cooling System ◽

Electricity Production ◽

Photovoltaic Panels ◽

Adsorption Cooling System ◽

Combined Cooling ◽

And Storage

Tropical climate is characterized by hot temperatures throughout the year. In areas subject to this climate, air conditioning represents an important share of total energy consumption. In some tropical islands, there is no electric grid; in these cases, electricity is often provided by diesel generators. In this study, in order to decarbonize electricity and cooling production and to improve autonomy in a standalone application, a microgrid producing combined cooling and electrical power was proposed. The presented system was composed of photovoltaic panels, a battery, an electrolyzer, a hydrogen tank, a fuel cell, power converters, a heat pump, electrical loads, and an adsorption cooling system. Electricity production and storage were provided by photovoltaic panels and a hydrogen storage system, respectively, while cooling production and storage were achieved using a heat pump and an adsorption cooling system, respectively. The standalone application presented was a single house located in Tahiti, French Polynesia. In this paper, the system as a whole is presented. Then, the interaction between each element is described, and a model of the system is presented. Thirdly, the energy and power management required in order to meet electrical and thermal needs are presented. Then, the results of the control strategy are presented. The results showed that the adsorption cooling system provided 53% of the cooling demand. The use of the adsorption cooling system reduced the needed photovoltaic panel area, the use of the electrolyzer, and the use of the fuel cell by more than 60%, and reduced energy losses by 7% (compared to a classic heat pump) for air conditioning.

Download Full-text

Theoretical Analysis of Photovoltaic Panels Using a Spray Cooling System with a Shallow Geothermal Energy Heat Exchanger

Proceedings of EuroSun 2018 ◽

10.18086/eurosun2018.11.15 ◽

2018 ◽

Author(s):

Jyun-De Liang ◽

Li-Hao Yang ◽

Ching-Yi Tseng ◽

Sih-Li Chen

Keyword(s):

Heat Exchanger ◽

Theoretical Analysis ◽

Geothermal Energy ◽

Cooling System ◽

Spray Cooling ◽

Photovoltaic Panels ◽

Shallow Geothermal Energy

Download Full-text

A High Angle, Double Tilting Cold Stage for the AEI EM7

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052262 ◽

1974 ◽

Vol 32 ◽

pp. 450-451

Author(s):

P.R. Swann ◽

A.E. Lloyd

Keyword(s):

Habit Plane ◽

Temperature Control ◽

Tilt Angle ◽

Cooling System ◽

Thermal Drift ◽

High Angle ◽

Cold Stage ◽

High Degree ◽

Better Than

Figure 1 shows the design of a specimen stage used for the in situ observation of phase transformations in the temperature range between ambient and −160°C. The design has the following features a high degree of specimen stability during tilting linear tilt actuation about two orthogonal axes for accurate control of tilt angle read-out high angle tilt range for stereo work and habit plane determination simple, robust construction temperature control of better than ±0.5°C minimum thermal drift and transmission of vibration from the cooling system.

Download Full-text

A conduction-cooled stage for high-resolution Cryo-SEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100131048 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1282-1283

Author(s):

John G. Sheehan

Keyword(s):

High Resolution ◽

Liquid Nitrogen ◽

Mechanical Stability ◽

Cooling System ◽

Cold Trap ◽

Nitrogen Gas ◽

Particulate Suspensions ◽

Advantages And Disadvantages ◽

Convection Cooling ◽

Styrene Butadiene

The goal is to examine with high resolution cryo-SEM aqueous particulate suspensions used in coatings for printable paper. A metal-coating chamber for cryo-preparation of such suspensions was described previously. Here, a new conduction-cooling system for the stage and cold-trap in an SEM specimen chamber is described. Its advantages and disadvantages are compared to a convection-cooling system made by Hexland (model CT1000A) and its mechanical stability is demonstrated by examining a sample of styrene-butadiene latex.In recent high resolution cryo-SEM, some stages are cooled by conduction, others by convection. In the latter, heat is convected from the specimen stage by cold nitrogen gas from a liquid-nitrogen cooled evaporative heat exchanger. The advantage is the fast cooling: the Hexland CT1000A cools the stage from ambient temperature to 88 K in about 20 min. However it consumes huge amounts of liquid-nitrogen and nitrogen gas: about 1 ℓ/h of liquid-nitrogen and 400 gm/h of nitrogen gas. Its liquid-nitrogen vessel must be re-filled at least every 40 min.

Download Full-text