residential energy storage systems GEOTHERMAL HEAT PUMP – THE CHOICE IS YOURS

by:MERITSUN     2019-06-29
Today's technology makes it possible for your home, office building, factory or farmland-the place of your choice-to become a source of heating and cooling geothermal energy (H & C ).This was not the case with geothermal energy decades ago.Geothermal energy comes from the thermal core of the Earth, and its existence is due to the initial formation of the Earth and the radioactive decay of minerals.
For a long time, there have been hot springs for bathing. the oldest hot springs are a stone swimming pool built on Lishan, China in 3rd century BC.Claudius-the oldest geothermal heating system in the worldThe French company Aigues has been operating since the 14 th century.
Geothermal Resources have always been limited to areas near the plate boundary.However, recent technological advances have greatly expanded the scope and scale of viable resources, especially in applications such as space heating or cooling.Applications that require higher levels get the most benefit from high natural heat flow, preferably with hot springs.
The next best option is to drill a well in a hot underground reservoir.If there is not enough Reservoir, an artificial reservoir can be built by injecting water into a hydraulic crack or a rock bed crack.The last method is called hot dry rock geothermal energy or enhanced geothermal system.
The potential of this method may be much greater than that of traditional exploitation of natural reservoirs.Today, geothermal energy is a clean and renewable resource that provides energy to all parts of the world in a variety of applications and resources.Geothermal energy is used for power production, commercial, industrial and residential direct heating, as well as for efficient home heating and cooling through geothermal heat pumps.
Geothermal power generation is developed by drilling wells into geothermal reservoirs from geothermal resources.These wells bring geothermal water to the surface, and geothermal energy is converted into electrical energy in geothermal power plants.Geothermal heating is the direct use of the Earth's heat, without involving power plants or heat pumps, for various applications such as space heating and cooling, food preparation, etc, hot spring bath, agriculture, aquaculture, greenhouse, industrial process.
Geothermal heat pump (GHPs): geothermal heat pumps take advantage of the relatively constant temperature of the Earth in the depths of about 10 to 300.GHPs can be used almost anywhere in the world as they do not require broken rock and water as conventional geothermal reservoirs do.GHPs circulating water or other liquids through continuous circulation pipes placed horizontally or vertically in the landscape area, parking lot or any number of areas around the building.
Environmental protection agencies consider them to be one of the most effective heating and cooling systems available.Compared to conventional heating and cooling systems, GHPs reduces power use by 30-60%, as the power that supplies them is only used to collect, concentrate and deliver heat, not to generate heat.There are currently three different ways of geothermal heating and cooling: 1.
The first (low temperature up to 30 °c) is based on relatively stable groundwater and ground temperatures at shallow depth (up to 500 m) and therefore also close to structural elements of the building.Typically, the heat pump is used to extract energy from the ground and to raise (and amplify) the energy to the level required by the temperature (and thermal efficiency/capacity) heating system for thermal regulation of space and processes.Ground or groundwater can also be used for cooling, and temperature can be applied directly under appropriate conditions.
In addition, the heat pump unit can also be used to provide cooling for the building or process, providing the required temperature again and putting the heat capacity of the large source.Under certain conditions and configurations, geothermal systems can be used manually (to control and optimize) ground temperatures for use as hot or cold storage (underground thermal energy storage.2.The second is to extract heat from the ground and groundwater at a higher depth and temperature around 150 °c.
In agriculture (gardening, drying, fish-Breeding), industrial processing and animal husbandry.It can also be used to provide energy to regional heating or thermoelectric joint units, or to drive a local absorption heat pump to provide cooling for the grid.Regional heating (and cooling) can also be supplied from the residual heat after generating electricity from a high-enthalpy geothermal heat source.
3.
Medium and low temperature applications can also take advantage of the building heating/cooling application or the remaining heat/cooling provided with the solar thermal integration.Unlike other renewable energy industries, the geothermal heat pump industry is currently the most dynamic industry.In the absence of structural subsidies (government support), the low enthalpy ground source (shallow system) experienced rapid growth.
There are different types of heating and cooling applications for GHP: 1.Closed-Loop application (vertical drilling) 2.Closed-Loop application (horizontal and shallow digging system) 3.
Closed-Loop application (basic integration system) 4.Direct expansion.The current industry standard geothermal heat pump unit uses a vertical closed loop drilling collector.Some small residential applications use horizontal collectors.
There is no major geographic limitation in the production of geothermal energy, and geothermal heating and cooling supplies can match H & C needs anywhere, as resources are everywhere.At present, geothermal energy sources are being used for regional heating, as well as for heating (and cooling) of individual buildings, including small (5-50 KW installed heat pump capacity), medium (50-500 KW) and large plan (capacity> 1 MW) (office, shop, health care, residential, school, university building, commercial building, greenhouse, Bath, etc ).).Existing housing infrastructure accounts for an overwhelming share of the low-temperature energy demand that geothermal heating systems can logically supply.
Current benchmarking studies suggest that direct use of geothermal energy sources and regional heating networks may be the most effective option for this market from a carbon footprint and economic perspective.However, these developments are quite complex in nature;Therefore, there is a need to replace the existing fossil energy infrastructure, which will take a longer period of development.The key challenge to the widespread direct use of geothermal energy is the ability to reliably design, design and control geothermal heat pump units in order to be able to use full-Circular potential of geothermal heat pump systems for sustainable energy efficiency.
Intelligent planning with follow functionIncreasing actions and reducing costs will allow the evolution of current "hunters"The collection economy of geothermal energy to systematically and organize the exploitation of geothermal resources.By taking the following steps, the share of shallow geothermal energy in our daily lives can be increased: integrating geothermal energy into a standard residential energy system.This step requires more penetration of geothermal heat pumps into the new residential and commercial construction markets.
This progress depends on renewable energy systems becoming the standard for new energy efficient buildings in all countries.Develop a heating and cooling network for integrated geothermal heat pumps and geothermal storage (UTES.Such developments will mean a wide range of geothermal energy-based heating and cooling networks over a time frame, followed by a continuing part of the third construction and small heating and cooling network market.
This will be based on the rapid diffusion of heating and refrigeration networks, which must be the standard for urban planning.Develop geothermal solutions for existing infrastructure modifications.This progress is based on some key factors.
First of all, it is necessary to develop cost-effective building energy renovation products and methods.Secondly, high temperature heat pumps must have higher performance or use buildings for Low Temperature space heating.Finally, the importance of improving energy efficiency standards as part of renovation activities will be highlighted in the building regulations.
To make the reader feel the costs involved, a summary from the European Geothermal Energy Council is listed below.Heating and Cooling (average speed of European market) deep geothermal-$7-area heatingMedium/kWhGeothermal heat pump system and Z month $-$ To be taken for medium/kWhGeothermal heat pump small system-Cent/kWhEuropean Continental is very active in developing residential geothermal heat pumps.Geothermal heat pumps with a capacity of 10 kW are usually installed at a cost of about $3000-$4000 per kW for closed-loop systems.
When the capacity is over 100 KW (large residential and tertiary buildings, schools, museums), the cost range of the open loop system is $7001000 per kW.Capital costs for commercial and institutional buildings and UTES systems for regional heating and refrigeration are $130,000-£ 190,000 per MWth (10% of the cost of investment), referring to the Swedish and Dutch experience with a running cost of $3040 per MWh
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