364 results about "Low demand" patented technology

The present invention provides a hybrid central / distributed and tiered video on demand (VOD) service network with tiered content structure. In particular, the present invention uses media servers located in both the headend station and the hub stations. Set-top boxes generally would be supplied VOD services from the high-demand content media servers located in the hub station nearest to the user. The central media server located in the headend would be used as an installed backup to the hub media servers; as the primary source for lower demand VOD services and as the source of the real time, centrally encoded programs with PVR (personal video recorder) capabilities.By distributing the servers to the hub stations, the size of the fiber transport network associated with delivering VOD services from the central headend media server is reduced. The invention provides that each user has access to several server ports located on at least two servers. Multiple paths and channels are available for content distribution to each user, assuring high system reliability and enhanced asset availability. Substantial cost benefits are derived from the reduced need for a large content distribution network and the reduced storage capacity requirements for hub servers.

A system for charging a multiplicity of commuter EVs without dependence on the power grid is provided, using the EV batteries themselves as distributed off grid storage for all EVs connected to the system. The EV charging system comprises low cost solar modules and an intelligent charge management system capable of a providing flexible charge rate to EVs based on user demand, that is decoupled from the grid and thus does not add to peak power demands. Only a low capacity grid connection is provided for backup, and buffer solar panels may be provided for load balancing. Excessive solar energy is fed into the grid during times of low demand at the charging stations, such as on weekends.

A compressed air pumped hydro energy storage and distribution system includes a first reservoir of water and a second reservoir of air and water. An air pressure source, connected to the second reservoir, develops a pressure head in the second reservoir. A pump / turbine-motor / generator, received by the first reservoir, is connected to a regional energy grid. During peak demand periods, the pressure head forces water through the pump / turbine-motor / generator to generate power, delivered to the grid. During low demand periods, the pump / turbine-motor / generator pumps water back to the second reservoir, regenerating the pressure head. A third air reservoir interconnected with the second reservoir and a gas turbine generator can be used to generate power during peak demand periods. The reservoirs can be tunnels or abandoned mines, reinforced and sealed by pressure grouting and / or an internal liner, maintained well beneath the earth's surface and intersecting the path of the grid.

The invention relates to an energy storing method and apparatus for use by end-users of energy, such as commercial property owners and operators. The system differs from past systems, insofar as it is not intended to be used by and in connection with energy suppliers, such as large utility and power supply plants and grids. The system preferably relates to the manner in which an end-user of energy can implement energy and costs savings, by using energy storage and time-shifting methods, to control and regulate the consumption of energy in a manner that achieves a cost savings over a period of time. One aspect of the method relates to accurately forecasting and predicting the energy demands and peaks that might occur on a daily basis, by recording and analyzing the prior day's history, as well as the overall energy demand histories, using short and long term forecasts, and then setting up a variable energy storage / use plan or schedule that helps to reduce the peak demands by time-shifting the energy that is used, i.e., reducing consumption during high demand / high cost periods, and using the energy stored during low demand / low cost periods during the high demand / high cost periods.

Consumer, merchant, and transactional data from a closed loop network and external sources may be leveraged to increase demand of a merchant's inventory during normally low-demand periods. Extensive data mining is used to determine the excess merchant inventory and demand patterns at different times and different locations for merchants and groups of merchants. Similar data mining is used to analyze cardmember demand patterns to identify the cardmember preferences regarding when and where they which to purchase goods and / or services. Cardmembers may also be grouped based on their demand patterns. Using pricing as a lever, cardholders with specific preferences are targeted to shift the demand from peak periods and locations to non-peak periods and locations, and to increase the non-peak demand by location as well as time period. Higher precision may be obtained using product level transaction data from point-of-sale terminals used by merchants wherever applicable.

A power plant that is used for storing energy during a low demand and returning the energy to a power plant during high or peak demand. A concrete tank is placed on the bottom of a deep body of water. A compressed air line connects the tank to a compressor and turbine assembly on land at the power plant. An electric motor drives the compressor to supply compressed air to the tank and displace the water within the tank during the low demand period. At high demand, the compressed air is allowed to flow through the turbine that drives an electric generator to produce electric power. The tank includes a water outlet pipe for the tank is displaced of the high pressure water and to allow the water to flow into the tank and displace the compressed air under high pressure to drive the turbine.

A method of storing and supplying a gaseous hydrogen product to a pipeline under a product purity specification in which a hydrogen stream made up of gaseous hydrogen is compressed to form a compressed hydrogen stream and introduced into a salt cavern for storage. A crude hydrogen stream, contaminated from storage in the salt cavern is recovered and purified by sufficiently removing at least carbon dioxide and water vapor to produce a hydrogen product stream having an impurity level at or below the product purity specification. The hydrogen product stream is supplied back to the pipeline. Alternatively, during periods of low demand, hydrogen produced by a production facility is both purified and supplied to the pipeline and stored in the salt cavern. During high demand period, both the output of the production facility and hydrogen retrieved from the salt cavern are purified and supplied to the pipeline.

A thermal energy transfer unit is provided for conventional Freon air conditioning. One or several thermal energy transfer units are operatively interconnected to one or several conventional air condition systems and share a common energy storage tank. Each thermal energy transfer unit converts energy from the compressor and condensing coil of the conventional air conditioner and stores it in the common energy storage tank when electricity is in low demand. Each thermal energy transfer unit retrieves stored energy from the common storage tank and provides air conditioning without the use of the compressor when electricity is in high demand. Each thermal energy transfer unit can be disabled to allow the air conditioning unit to perform as if they and the energy storage tank were not connected. One or all of the units can be disabled without affecting the performance or purpose of the others.

The invention relates to a dual-cycle circuit limestone / lime-gesso wet smoke desulfuration method. It uses dual-circuit adsorption tower spray system while each system has independent spray layer, slurry cycle pump and slurry collector and two slurry collector are connected via connecting tubes. Said dual-circuit adsorption tower spray system are operated in different pH, while the pH of upper circuit is between 5.5-6.8 and the pH of lower circuit is between 4-5. The invention has strong adaptability to the change of coal kinds and the change of boiler load, with lower demand for limestone slurry preparing system. It can confirm the desulfuration efficiency without adding spray layer and increasing the height of adsorption height, and it can effectively reduce the cost. The invention especially apply the purification of the smoke whose sulfur content is above than 3.5% while the desulfuration efficiency is higher than 97%.

The method involves storing and transporting power in the form of compressed air energy, via a pipeline. The method preferably consists of using at least one power source such as a wind turbine to drive a compressor to compress air into storage, wherein the size and length of the pipeline can be adapted to reduce the pressure losses that are experienced along the length of the pipeline. The facility or community using the energy can use energy in the form of electricity, or to drive pneumatic tools or equipment, or to generate chilled air as a by-product, which can be used for refrigeration, air conditioning or desalination. A utility or grid can be provided to generate compressed air energy when the wind is not blowing, wherein compressed air energy can be produced and stored during low demand periods, and used during high demand periods.

The invention relates to a method for preparing dexmedetomidine, which comprises the following steps of: 1) providing 4-imidazole formic ether, 2) reacting the 4-imidazole formic ether with stronger ammonia water and ammonium chloride so as to form 4-imidazole acid amide, 3) reacting the 4-imidazole acid amide with a cyaniding agent so as to form 4-cyano-group imidazole, and 4) generating the dexmedetomidine from the 4-cyano-group imidazole. The method of the invention needs no blocking group and de-blocking group, uses the cheap raw materials which are easily obtained, has simple route, requires mild reaction condition, has low demand on production device and has a small volume of the three wastes. The prepared dexmedetomidine has high yield coefficient and high purity and is fit for industrial production.

The invention discloses a wireless network multi-path routing network transmission method aiming to solve the problem that the existing network coding transmission methods need many time slots, and have too many data transmission times and too high demand for nodes. The main steps of the method are network initialization and data transmission; the network initialization is mainly to determine the level of each node and the neighbor node information and complete networking; the data transmission is that a node judges the zone bits of message packets to perform different treatments to different kinds of message packets, judges the zone bits of the levels of message packets to selectively receive the desired information, judges the local information pool and neighbor information list to select the optimal network coding and performs primary data transmission to complete information transmission and the information transmission of the node. The invention has the advantage of less time slots and data transmission times and lower demand of nodes for network and can be used for multi-user wireless data transmission.