摘要:
In order to control the tightness of a central heating system (10, 11) which may be connected to a district heating system (1, 2), the system is provided with a flow meter (8, 9) and a valve (6, 7) in the flow (3) and return pipes (4), respectively. Hereby it becomes possible to monitor the liquid flow through the flow meters (8, 9) and in a control unit (15) to compare the signals from the flow meters (8, 9) in order subsequently to produce a signal for an electric motor on the inflow valve (6) when a certain limit value is exceeded in order to shut off the flow of water into the system (10,11) and to a signalling device (16), if any.
摘要:
An energy system that couples or integrates an electrochemical converter, such as a fuel cell for the production of electricity, with a Heating, Ventilation and Cooling (HVAC) system, is disclosed. Waste heat generated by the fuel cell is radiatively, convectively, or conductively directed to a thermal component, such as a heat-actuated chiller or a boiler, of an HVAC system. The HVAC system receives the waste heat to produce a conditioned fluid, e.g. heated or cooled air or water, or steam, for heating, cooling, or industrial uses. The invention provides an improved efficiency energy system capable of providing electricity, heating and cooling, such as for a commercial facility or for residences. Also disclosed in an interface exchange element for convectively coupling an electrochemical converter to the HVAC system. The interface exchange element receives heated exhaust gases generated by the fuel cell and extracts heat therefrom for transfer to a thermal component, such as heat-actuated chiller or a boiler, of an HVAC system.
摘要:
An arrangement for exchanging heat between a system of pipes which conduct a fluid heat exchange medium and a platelike heat exchange member. The arrangement is particularly intended for use in connection with air temperature regulating means such as solar heaters and waste heat systems which operate at a small temperature differential between the temperature of the plate-like heat exchange member and the fluid medium. Mutually facing surfaces of two substantially parallel material layers form a plenum. One of these surfaces comprises one side of the plate-like heat exchange member. The pipes which conduct the fluid medium are arranged parallel to one another in the plenum and are spaced apart from each other in a longitudinal direction of the plenum. A stream of gas or air is arranged to flow through the plenum. Gaps are formed on opposite sides of the pipes by spacer means. These gaps extend along a considerable part of the outer surface of each pipe and the gaps are dimensioned to cause the air or gas to move in a laminate flow through the gaps.
摘要:
A system for tempering a room is accommodated in a closure of said room, preferably in the floor. On the side of the closure facing away from the room an insulating plate (103) is located, which possibly has projections (18) arranged in the direction of the room. On the side facing the room a wall or floor covering (6) is foreseen. In the interspace between the insulating plate (103) and the outer layer (6), possibly between the projections (18), air can be circulated and a heating and/or cooling line (1) extends, said heating and/or cooling line being at least partially in connection with a thermal conductive sheet (17). The total surface of the thermal conductive sheet (17) exposed to the air flow is about twice as large at the surface of the thermal conductive sheet (17) which directly envelopes or contacts the line (1) and which is exposed to the air flow. The interspace is especially defined by a box section (17, 102) consisting preferably of several parts, of which one as a thermal conductive sheet (17) partially envelopes the line (1).
摘要:
A radiator for heating installations comprises an external container consisting of component elements, and a heat exchanger which goes through the entire assembly of elements forming the radiator acting as the tie-beam which holds the elements together. A second tie beam is positioned in the upper part of the elements to hold them together. The finned tube which constitutes the heat exchanger, is provided with an internal coaxial tube, of length slightly smaller than the external tube. The primary heating fluid returns through the internal tube so that the supply of the fluid is carried out from a single extremity of the apparatus. Since the walls of the radiator are not subjected to high pressure, the radiator may be manufactured of material of modest mechanical resistance, for instance plastic material.