Abstract:
Method and apparatus for operating a combined heat and power system with greater flexibility, reliability, control and stability, for providing operational flexibility and energy efficiency in operating a combined heat and power plant which includes a backpressure steam engine that expands a high temperature heat source of a thermodynamic fluid to generate mechanical power and discharge its spent heat for a beneficial use comprises a vessel subsystem for the spent heat, said vessel subsystem including: at least one main indirect heat exchange device or vessel (7) in heat exchange communication between its primary space (10) and its secondary space (11). The present invention also discloses the use of a method and apparatus to operate a combined heat and power system.
Abstract:
Method for modifying a solar thermal power plant (2) operating on conventional oil based technology into a hybrid solar thermal power plant (1), wherein the method comprises: • providing an oil based solar thermal power plant (2) comprising a solar collection system with at least one radiation absorber tube containing a heat transfer oil to be heated by means of the solar collection system, • providing an molten salts solar thermal power plant, (4) wherein the molten salts solar thermal power plant comprises a solar collection system to heat a molten salts mixture • coupling of the respective plants such that the hybrid solar thermal power plant is configured to heat medium temperature steam that is generated by the oil based solar power plant by means of the molten salts mixture thereby producing high temperature steam and subsequently supplying it to a steam turbine (40) to generate electricity.
Abstract:
A turbine bypass system comprises a bypass path (10) which is selectively operable to deliver hot gases to a gas cooler (12) and a pebble bed (16) positioned in the bypass path (10) upstream of the gas cooler (12). The pebble bed (16) absorbs heat from the bypass gases and thereby reduces the temperature of the bypass gases prior to delivery of the bypass gases to the gas cooler (12).
Abstract:
A power plant uses an energy source (1) to produce electricity in a first generator. The electricity from the first generator provides heat to a solid heat storage medium (2). The solid heat storage medium (2) is a heat exchanger and water is pumped through the solid heat storage medium to receive heat in order to convert the water into steam. The steam is then used to drive a set of second generators (4) to produce electricity. In this way, electricity can be produced using heat from the heat storage medium (2) whether or not the energy source (1) is operable. For example, if the energy source (1) is a wind turbine and the wind is not traveling at sufficient velocity to produce electricity, the heat storage medium can be used to convert water into steam, and reheat steam which is then used to generate electricity in a second generator (4).
Abstract:
Die Erfindung betrifft einen Energiespeicher, eine Kraftwerksanlage mit einem derartigen Energiespeicher und ein Verfahren zum Betreib desselben. Der Energiespeicher weist einen Wärmetauscher auf, der auf einem vorzugsweise über eine erste Zuleitung mit Wasser befüllbarem, als See ausgebildetes Unterbecken schwimmend angeordnet ist, wobei über eine zweite Zuleitung Wasser aus dem Unterbecken und über eine dritte Zuleitung den Wärmetauscher durchdringendes Kühlmittel einer Wärmepumpe in getrennten Kreisläufen zuführbar ist, so dass Energie über den Wärmetauscher unter Vereisung des Wassers des Unterbeckens oder in Form von sensibler Wärme aus dem Wasser des Unterbeckens entnehmbar und an einen Verbraucher zur Wärmeabgabe und/oder zur Kälteabgabe weiterleitbar ist.
Abstract:
Es wird eine Vorrichtung und ein Verfahren zur Abwärmenutzung einer Brennkraftmaschine (2) vorgeschlagen, wobei in einem Leitungskreis (4), in dem ein Arbeitsmedium zirkuliert, eine Speisepumpe (6), ein Wärmetauscher (8), eine Expansionsmaschine (10) und ein Kondensator (12) angeordnet sind. Im Leitungskreis (4) ist weiterhin ein Dampfspeicher (40) zur Speicherung des dampfförmigen Arbeitsmediums angeordnet.
Abstract:
A system and method for storing electric energy in the form of thermal energy is described. A thermoelectric energy storage system comprises a working fluid circuit for circulating a working fluid through a heat exchanger (16) and a thermal storage medium circuit for circulating a thermal storage medium, the thermal storage medium circuit having at least one hot storage tank (24), one intermediate temperature storage tank (22) and one cold storage tank (20) connected together via the heat exchanger (16). A proportion of the storage medium is redirected to or from the intermediate storage tank from or to the hot or cold storage tank, joining another proportion which flows directly between the cold and hot storage tank.
Abstract:
The invention relates to an engine assembly comprising an internal combustion engine (1) and a steam engine (7) connected to a driving assembly (23), and a heat exchanger (4), by which the heat losses from the internal combustion engine (1) is utilized for generation of steam to the steam engine (7). In order to obtain an engine assembly with small weight and size and small environmental harmful emission, but still being able to give high power output when required, the steam engine (7) is of displacement type, and excessive steam from the heat exchanger (4) which is not required for driving the steam engine (7) is arranged to be fed to a steam buffer (20), which is designed to emit a heavy flow of steam for short time periods, when required, to the steam engine (7).
Abstract:
High temperature thermal energy exchange system with horizontal heat exchange chamber and method for exchanging thermal energy by using the high temperature thermal energy exchange system A high temperature thermal energy exchange (heat) exchange system is provided. The high temperature thermal energy exchange system comprises at least one horizontal heat exchange chamber with chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber, wherein the chamber boundaries comprise at least one inlet opening for guiding in an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one outlet opening for guiding out an outflow of the heat transfer fluid out of the heat exchange chamber interior, at least one heat storage material is arranged in the heat exchange chamber interior such that a heat exchange flow of the heat transfer fluid through the heat exchange chamber interior causes a heat exchange between the heat storage material and the heat transfer fluid and the heat high temperature thermal energy exchange system is developed such that horizontal heat exchange flows of the heat transfer fluid through the heat exchange chamber interior differ from each other in vertical direction. The horizontal heat exchange flows are different in vertical direction of the heat exchange chamber. The heat transfer fluid is led into heat exchange channels via the inlet openings and is led out of the heat exchange channels via the outlet openings. Preferably, the heat transfer fluid is air with ambient pressure. An operating temperature of the high temperature thermal energy exchange system is more than 600 °C.