摘要:
An output controller for a stirling engine is provided in a cooling system 1A that causes common cooling water to flow through both the stirling engine 20 and an internal combustion engine 10 serving as a motive power source other than the stirling engine 20. The output controller for the stirling engine includes a temperature adjustment portion that adjusts a temperature of the cooling water supplied to the stirling engine 20. Specifically, the temperature adjustment portion includes a temperature adjustment valve 34 capable of adjusting the temperature of the cooling water supplied to the stirling engine 20 by switchably setting at least one of partial cooling paths L1 and L2 into a communication state.
摘要:
This Stirling machine comprises a transfer piston (6, 6a) and a moving part (14) of a generator or of an electric motor, the transfer piston (6, 6a) periodically displacing a working gas between an expansion chamber (V E ) and a compression chamber (V c ) which chambers are respectively associated with two working faces of the transfer piston (6, 6a) of which the cross-sectional area ratio a c /a E is > 0.35 so that its displacement along an axis X oriented towards the expansion volume (V E ) generates an in-phase working gas pressure component P x that opposes the displacement of the piston (6, 6a), so that all of the mechanical energy produced is transmitted to the moving part (14). This machine comprises a resonant second piston (10) coupled to the transfer piston (6, 6a) by a quantity of energy that is proportional to the pressure component P x .
摘要:
The present invention provides a heat medium circulation structure for a micro-combined heat and power (micro-CHP) generator in which a heat medium that primarily looses heat by undergoing heat exchange with water in a hot-water tank and thus has a low temperature further performs heat exchange with low-temperature direct water supplied through a direct water line, thereby further loosing heat, in a return line heat exchanger, and then returns to a stirling engine through a heat medium return line, thereby effectively cooling a low temperature portion of the stirling engine. Thus, the heat medium circulation structure enables high electricity production efficiency. Further provided is a hot water temperature control method for a micro-CHP generator in which the consumption of hot water is detected by a flow sensor. First and second predetermined temperatures are defined to operate a stirling engine in the case of temperature droppings of hot water respectively due to natural radiation and consumption of hot water.
摘要:
A heat engine (1000) comprises a first volume (100) designed to be alternately heated and cooled, a second volume (200) designed to be alternately heated and cooled, a working medium (10) contained in the first and second volume (100, 200), and a fluid conduit (400) via which the first volume (100) and the second volume (200) are interconnected. A machine (300) that can be operated using the working medium is connected to the fluid conduit (400) between the first volume and the second volume (200). The heat engine (1000) is designed such that the working medium (10) is heated in the first volume (100) while being cooled in the second volume (200) in a first state, and the working medium (10) is cooled in the first volume (100) while being heated in the second volume (200) in a second state.
摘要:
A Stirling engine (1) includes a reciprocating piston which drives an alternator to provide an electrical output (7). The current signal (7) is measured by a current monitor (60) and a fast Fourier Transform value is produced. The FFT of the current signal (7) has been found to be directly related to the stability of operation of the Stirling engine. As harmonic peaks in the FFT increase, this indicates that the stroke length of the piston is approaching or exceeding a safe maximum. Correction action, such as a reduction in heat to the Stirling engine, can be taken in consequence. A variety of stroke length detectors (110) are also disclosed, for use in combination with, or separately from, the FFT analysis of the current signal (7). Optical and mechanical switches and analogue sensors are disclosed, along with an accelerometer mounted upon the casing of the Stirling engine.
摘要:
A DCHP unit with a Stirling engine (1), a burner (3) and a supplementary burner (11). Water is heated by exhaust gas from the Stirling engine and from the supplementary burner. If a sensor (18) detects that the water temperature has risen indicating that there is insufficient demand for the heat in the exhaust gas, a fan (15), (20) which normally provides the flow of air to the supplementary burner is operated without firing the burner to generate a flow of cool air to cool the water.
摘要:
A method for controlling the fuel-air ratio of a burner having a blower responsive to a blower drive signal for injecting air into the burner. The method is based at least on the concentration of a gas in an exhaust gas product of a combustion chamber of the burner and includes measuring the gas concentration in the exhaust gas product, deriving a gas concentration signal from the measured gas concentration, determining the fuel-air ratio from the gas concentration signal and the sign of the derivative of the gas concentration signal with respect to the blower drive signal, and controlling the fuel-air ratio by adjusting the air flow rate into the burner. The burner may be, for example, in a Stirling cycle engine.
摘要:
The present invention provides a heat medium circulation structure for a micro-combined heat and power (micro-CHP) generator in which a heat medium that primarily looses heat by undergoing heat exchange with water in a hot-water tank and thus has a low temperature further performs heat exchange with low-temperature direct water supplied through a direct water line, thereby further loosing heat, in a return line heat exchanger, and then returns to a stirling engine through a heat medium return line, thereby effectively cooling a low temperature portion of the stirling engine. Thus, the heat medium circulation structure enables high electricity production efficiency. Further provided is a hot water temperature control method for a micro-CHP generator in which the consumption of hot water is detected by a flow sensor. First and second predetermined temperatures are defined to operate a stirling engine in the case of temperature droppings of hot water respectively due to natural radiation and consumption of hot water.