Influence of Microwave Radiation on the Freezing Rate of Water in a Heat Pump Installation

The article presents the data obtained as a result of an experiment to determine the eﬀect of microwave radiation on the freezing rate of water in a heat pump installation are presented. (Research purpose) The research purpose is in experimentally evaluating the eﬀect of microwave radiation on the speed of the water-ice phase transition to increase the eﬃciency of the heat pump unit by increasing the rate of water crystallization. (Materials and methods) The main criterion for conducting the experiment was the speed of the water-ice phase transition of ordinary water and water that passed through microwave radiation. The article presents an experimental installation for conducting experiments, consisting of a 90-liter freezer, a Danfoss TLES4F compressor with a cooling capacity of 91 Watts, a programmable Arduino controller with four connected sealed DS18B20 temperature sensors, a water tank made of food- grade plastic. The article presents the scheme of the experimental installation. The water was treated with microwave radiation for 12 seconds, the thickness of the water layer was 4-5 millimeters, and the power of the magnetron used was 750 Watts. (Results and discussion) There was conducted 20 experiments on obtaining thermal energy using the water-ice phase transition. Ten experiments with ordinary filtered water and ten experiments with water subjected to microwave radiation. (Conclusions) Water subjected to uniform microwave radiation cools to 0 degrees Celsius 23 minutes earlier than water that has passed only filtration, and performs a phase transition to a solid state 74 minutes faster. Microwave radiation can be used to increase the eﬃciency of a heat pump using the energy of the water-ice phase transition by accelerating the production of thermal energy from the heat carrier to the heat supply system.

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Design of a Heat Exchanger for Gathering Energy of the Water-Ice Phase Transition

Elektrotekhnologii i elektrooborudovanie v APK ◽

10.22314/2658-4859-2020-67-2-57-61 ◽

2020 ◽

Vol 67 (2) ◽

pp. 57-61

Author(s):

Irina G. Ershova ◽

Dmitriy V. Poruchikov ◽

Aleksey N. Vasil’ev ◽

Mikhail A. Ershov

Keyword(s):

Phase Transition ◽

Heat Exchanger ◽

Solar Collector ◽

Closed Loop ◽

Research Purpose ◽

Industrial Complex ◽

Water Tank ◽

Transfer Energy ◽

Water Ice ◽

Ice Phase

The heat exchanger for gathering energy of the water-ice phase transition belongs to refrigeration technology and can be used in agriculture, namely at the enterprises of the agro-industrial complex and in systems of thermal accumulators, as well as for heating industrial and infrastructure facilities. (Research purpose) The research purpose is in developing a heat exchanger scheme for gathering energy of the water-ice phase transition. (Materials and methods) Authors have identified analogues and a prototype and considered their shortcomings. (Results and discussion) It was found that the technical result is achieved in the heat exchanger for gathering energy of water-ice phase transition containing a tank, a pump, according to the utility model, equipped with evaporator, compressor, condenser, throttle valve, forming a closed loop, and a solar collector. The evaporator is designed as a silicone tube, located in a coil, on the surface of which ice is formed, and inside that circulates a refrigerant to transfer energy of water-ice phase transition. The article shows that the capacity is divided by a partition with insulating material, whose height does not reach upper edge, in two sections for water evaporator and ice collector, which are connected by a pipe with pump from the tank for collecting and melting the ice in the water tank with evaporator. A heater connected to a solar collector and installed in the container for collecting and melting ice. (Conclusions) The article presents the scheme of a heat exchanger for gathering energy of the water-ice phase transition, describes its structure and operating principle.

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Experimental Installation at the Water-Ice Phase Transition

Elektrotekhnologii i elektrooborudovanie v APK ◽

10.22314/2658-4859-2020-67-2-21-26 ◽

2020 ◽

Vol 67 (2) ◽

pp. 21-26

Author(s):

Andrey A. Novikov ◽

Irina G. Ershova

Keyword(s):

Phase Transition ◽

Heat Exchanger ◽

Solar Collector ◽

Heat Pumps ◽

Research Purpose ◽

Industrial Complex ◽

Silicone Tube ◽

Water Ice ◽

Experimental Installation ◽

Ice Phase

The article reviewes the specifics of electricity production in Russia. One of the most effective energy saving methods is the use of heat pump installations. Its main property is the ability to extract heat from the environment: soil, water, reservoirs, the surrounding air, and the sun. Existing heat pumps with a water-ice phase transition are not efficient enough and have a high installation cost due to its complexity. (Research purpose) The research purpose is in determining the parameters and operating modes of the experimental installation at the water-ice phase transition. (Materials and methods) The article presents analogs and a prototype of an experimental installation at the water-ice phase transition. (Results and discussion) The article presents a scheme and an experimental installation for generating energy for the water-ice phase transition, consisting of a tank, pump, refrigerant, evaporator, compressor, condenser, throttle valve, and solar collector. The heat exchanger was manufactured as a flexible corrugated silicone tube with a metal insert, in which antifreeze circulates and ice forms on the surface. It was found that the received energy accumulates inside the silicone tube and is sent to the consumer’s heat exchanger in the form of hot liquid antifreeze. A heater connected to a solar collector was used as a heat source for melting ice. (Conclusions) It has been revealed that the designed installation scheme is made to design heat pumps that consume energy from the water-ice phase transition for heating agricultural, industrial, and infrastructure facilities; at the enterprises of the agro-industrial complex, in systems of thermal accumulators, as well as for obtaining a water-ice mixture for cooling products in agricultural production (milk, for example).

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The Initial Requirements for the Heat Exchanger for Gathering Phase Transition Energy

Elektrotekhnologii i elektrooborudovanie v APK ◽

10.22314/2658-4859-2020-67-2-51-56 ◽

2020 ◽

Vol 67 (2) ◽

pp. 51-56

Author(s):

Aleksey N. Vasil’ev ◽

Irina G. Ershova ◽

Dmitriy V. Poruchikov ◽

Mikhail A. Ershov

Keyword(s):

Magnetic Field ◽

Phase Transition ◽

Heat Exchanger ◽

Heat Exchange ◽

Heat Pump ◽

Experimental Sample ◽

Water Ice ◽

Heat Pump Unit ◽

Heat Exchange Equipment ◽

Ice Phase

Production of heat power equipment and provision of agricultural production facilities with it is less than 40 percent, so it is important to conduct research on the development of domestic heat exchange equipment. (Research purpose) The research purpose is in developing the initial requirements for the heat exchanger of an experimental installation in order to gather the energy of the water-ice phase transition for its manufacture. (Materials and methods) Authors conduct patent search on the websites of the World Intellectual Property Organization, Rospatent, Google patents, the European Patent Office and the Eurasian Patent Organization. The article presents drawings using the COMPASS-3D V17 graphic editor. (Results and discussion) The article presents an energy-saving system for maintaining the microclimate of an agricultural facility using a heat pump. It was found that the thermal and physical parameters of the coolant (freezing point, thermal conductivity, solubility of salt, density) as water and salt solutions of various concentrations, as well as electrical and physical parameters (permittivity, tangent of the dielectric loss angle, electrical conductivity, temperature coefficient of electrical conductivity) change during external electrophysical treatment (exposure to an electric field, including electric freezing), magnetic field (including alternating magnetic field in the ultrahigh frequency range, low-frequency magnetic field, weak infra-low frequency magnetic field). (Conclusions) The energy-saving, eco-friendly heat exchange equipment with a heat pump unit is designed to maintain the microclimate of agricultural facilities. The article presents the initial requirements for the heat exchanger of the experimental installation for obtaining the energy of the water-ice phase transition, which will allow producing an experimental sample. Authors have developed a scheme for a heat exchanger of an experimental sample of heat exchange equipment with a heat pump unit for gathering energy of the water-ice phase transition.

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Research of the Effect of Microwave Radiation on the Speed of the Water-Ice Phase Transition

10.2507/32nd.daaam.proceedings.068 ◽

2021 ◽

pp. 0472-0476

Author(s):

Andrey Novikov ◽

Nikolay Grebenshchikov ◽

Denis Shilin ◽

Dmitry Shestov ◽

Pavel Ganin ◽

...

Keyword(s):

Phase Transition ◽

Microwave Radiation ◽

Water Ice ◽

Ice Phase

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Electromagnetic Properties of Ice near the Water–Ice Phase Transition Temperature

Physics of the Solid State ◽

10.1134/1.1913986 ◽

2005 ◽

Vol 47 (4) ◽

pp. 715 ◽

Cited By ~ 3

Author(s):

G. S. Bordonskiı̆

Keyword(s):

Phase Transition ◽

Transition Temperature ◽

Phase Transition Temperature ◽

Electromagnetic Properties ◽

Water Ice ◽

Ice Phase

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Experimental Testing of a Thermoelectric-Based Hydronic Cooling and Heating Device With Transient Charging of Sensible Thermal Energy Storage Water Tank

Volume 8: Energy Systems: Analysis, Thermodynamics and Sustainability; Sustainable Products and Processes ◽

10.1115/imece2008-69235 ◽

2008 ◽

Author(s):

Michael J. Kazmierczak ◽

Sreenidhi Krishnamoorthy ◽

Abhishek Gupta

Keyword(s):

Energy Storage ◽

Heat Exchanger ◽

Heat Pump ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Storage Tank ◽

Hot Water ◽

System Component ◽

Water Tank ◽

Te Modules

Experiments were performed to charge either cold or hot water thermal energy storage tanks using a heat exchanger equipped with multiple thermoelectric (TE) modules. The primary objective was to design a simple, but effective, modular Peltier heat pump system component to provide chilled or hot water for domestic use at the appliance level, and when arranged in multiple unit combinations, a system that can potentially satisfy small home cooling and heating requirements. Moreover, when the TEs are directly energized using solar PV panels, the system provides a renewable, pollution free and off-the-grid solution to supplement home energy needs. The present work focuses on the design and testing of a thermoelectric heat exchanger component that consists of two water channels machined from two aluminum plates with an array of three or five thermoelectric modules placed in between to transiently cool and/or heat the water in the thermal energy storage tank. The water passing over either the cold or hot side of the TE modules is recirculated to charge the cold or hot thermal storage tank, respectively. The temperatures in the prototype Peltier heat exchanger test component and thermal energy water storage tank were measured during both cold tank charging and hot tank charging operation. The thermal efficiencies of TE heat pump cooling/heating system are reported. The effects of TE power input, number of TE units and rate of fluid flow are studied.

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