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3524 results about "Energy loss" patented technology

Figure 1. Energy losses in an incandescent light bulb are very large; most of the input energy is lost in the form of heat energy. When energy is transformed from one form to another, or moved from one place to another, or from one system to another there is some energy loss.

Distributed power harvesting systems using DC power sources

A photovoltaic panel with multiple photovoltaic sub-strings including serially-connected photovoltaic cells and having direct current (DC) outputs adapted for interconnection in parallel into a parallel-connected DC power source. A direct current (DC) power converter including input terminals and output terminals is adapted for coupling to the parallel-connected DC power source and for converting an input power received at the input terminals to an output power at the output terminals. The direct current (DC) power converter optionally has a control loop configured to set the input power received at the input terminals according to a previously determined criterion. The control loop may be adapted to receive a feedback signal from the input terminals for maximizing the input power. A bypass diode is typically connected in shunt across the input terminals of the converter. The bypass diode functions by passing current during a failure of any of the sub-strings and/or a partial shading of the sub-strings. The bypass diode may be a single bypass diode connected across the parallel-connected DC power source. The DC power converter may convert the input power at high current to the output power at a lower current. The output terminals may be connectible with wire cables to a load, and the DC power converter is configured to reduce energy loss through the wire cables to the load.

Device for concentrating optical radiation

A holographic planar concentrator (HPC) for collecting and concentrating optical radiation is provided. The holographic planar concentrator comprises a planar highly transparent plate and at least one multiplexed holographic optical film mounted on a surface thereof. The multiplexed holographic optical film has recorded therein a plurality of diffractive structures having one or more regions which are angularly and spectrally multiplexed. Two or more of the regions may be configured to provide spatial multiplexing. The HPC is fabricated by: (a) recording the plurality of diffractive structures in the multiplexed holographic optical film employing angular, spectral, and, optionally, spatial multiplexing techniques; and (b) mounting the multiplexed holographic optical film on one surface of the highly transparent plate. The recording of the plurality of diffractive structures is tailored to the intended orientation of the holographic planar concentrator to solar energy. The HPC is mounted in the intended orientation for collecting solar energy and at least one solar energy-collecting device is mounted along at least one edge of the holographic planar concentrator. Examples of suitable solar energy-collecting devices include photovoltaic cells and fiber optic light guides for transmitting collected light into an interior of a building for illumination purposes and for transmitting collected solar radiation into a hot water tank for heating. The HPC permits efficient collection of solar energy without expensive requirements, while minimizing energy losses.

Variable air volume air-conditioner control system with variable frequency fan and digital air valve for adjusting tail end air volume and implementation method

The invention discloses a variable air volume air-conditioner control system with a variable frequency fan and a digital air valve for adjusting tail end air volume and an implementation method, belonging to the technical field of the control of a variable air volume air-conditioner system. The variable air volume air-conditioner control system structurally comprises a master station DDC (direct digital control) controller, a tail end temperature controller, a filed bus, a tail end variable air volume box (VAV-BOX) and an air valve driver, comprises mater station DDC control and tail end temperature controller control in control types, and adopts a strategy of collective processing at first and decentralized control later. Through a method for adjusting the tail end air volume by the variable frequency fan and the digital air valve, the variable air volume air-conditioner system eliminates throttle energy loss of the air valve without a device for measuring the air volume, has simple control type and no influence on the operation of the whole variable air volume system, and has the advantages of good system stability and obvious energy-saving effect; and the fault on the variable air volume tail end device of certain node has no influence on the normal operation of other variable air volume tail end devices.

Energy-saving control method and energy-saving control device for refrigerator, and refrigerator

The invention provides an energy-saving control method and an energy-saving control device for a refrigerator, and the refrigerator. The energy-saving control method for the refrigerator comprises the following steps: detecting and judging an environment temperature interval of an environment temperature of the current environment where the refrigerator is located, and determining a compressor rotational speed gear, a fan rotational speed gear and a defrosting period gear according to a judgement result; and detecting opening-closing action of a door of the refrigerator, and adjusting the compressor rotational speed gear and the fan rotational speed gear or controlling turn-on and turn-off of a fan according to a detection result. According to the technical scheme of the invention, intelligent comprehensive control for the compressor rotational speed gear and the fan rotational speed gear, or control for the turn-on and turn-off of the fan and the defrosting period gear is realized through detecting and judging the environment temperature interval of the environment temperature of the current environment where the refrigerator is located, and detecting the opening-closing action of the door, thus the refrigerator achieves intelligent energy saving, the storage quality of foods in the refrigerator is ensured, the noise of the refrigerator is lowered, energy loss is reduced, and user experience is improved.

Rocking ship propulsion and the rocking propelled ship

For any directed sea waves the rocking propelled ship can reach high speeds if it utilizes an sea waves energy by means of 1. A rocking propulsor, which is a couple of hydrofoils kept elastic cross by pivots on the extreme points of streamline narrow keel-rocker, extended far out off long sizes of the ship and thus wags hydrofoils vertically with a speed and an amplitude being sufficient for its proper work; 2. A "pendulum design" of a rocking propelled ship, described by a light wide body with weight, concentrated in a middle lowest ship's part and having a vertical keel with a heavy bob. This design provides the highest efficiency of an energy transmission from waves to ship rocking. In case of need to increase ship's speed some more its rocker should be rigged by an on-board oscillator, which is a central heavy flywheel, which is alternately twisted up to speed by a serve motor in both directions on cross axle in time (resonance) of ship rocking. In order to accelerate and change revolution directions without energy loss the flywheel is supplied by spring returners. If the ship is assigned to navigate in both sea state cases (high or calm) the oscillator is mounted into the rocking propulsor, which is attached to the ship bottom with a hinger. It can be locked to the bottom to be swinged by a rocking ship hull to propell the ship by wave generated rocking motion. It can be unlocked to be swinged by the board oscillator undependently from the ship hull to propel the ship in case of calm sea.
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