148results about "Central heating exchangers" patented technology

The invention provides a method for directly feeding primary network returned water in the steam condenser as condensed water and a method for reducing the water outlet temperature of the condensed water of a steam condenser step by step, increasing the water supply temperature of a primary network step by step and improving the power generation efficiency and the heat supply effect. The method comprises a thermal power plant steam extraction heat supply system, a returned water temperature adjusting system, a thermal power plant steam condenser cooling water system and a high-temperature-difference heat supply primary pipe network.

A cogeneration system includes a first cooling device disposed in a cooling water circulation path extending between an engine and a waste-heat heat exchanger, and a second cooling device disposed in a hot water circulation pipe extending between a hot water storage tank and a hot air heater. The first cooling device is activated to cool cooling water when the temperature of hot water stored in the hot water storage tank exceeds a first predetermined value, and the second cooling device is activated to cool the hot water when the temperature of hot air inside the hot air heater exceeds a second predetermined value.

A refrigeration cycle apparatus (50) includes: a main refrigerant circuit (21) having a compressor (1), a radiator (2), a first expansion mechanism (5), a second expansion mechanism (6), and an evaporator (4); an injection passage (22) for supplying an intermediate-pressure refrigerant to an injection port 1c of the compressor 1; and a water circuit (30) through which water to be heated in the radiator (2) flows. The refrigeration cycle apparatus (50) includes a sub heat exchanger (3) for cooling the water in the water circuit (30) by exchanging heat between the refrigerant in the injection passage (22) and the water to be heated in the radiator (2).

A heating and hot water supply apparatus is provided with a heat pump unit (2), a water storage tank (1), a heat exchanger (10) in the water tank and pipe lines (31, 32). Hot water stored in the water storage tank (1) by being guided by the pipe line (32) passes through a radiator (30) outside the water storage tank (1), then returns into the storage tank (1) by being guided by the pipe line (31) for circulation. Thus, the radiator (30) can directly use heat of large quantity hot water stored in the water storage tank (1).

A hot water storage type hot water supply device is capable of heating water inside a hot water storage tank appropriately, thereby preventing energy waste. A circulating pump is operated and a burner is incinerated, when the average of detected temperatures from water temperature detectors falls below a predetermined lower limit temperature. The burner is extinguished when an accumulated heating amount from the beginning of operation of a heat source equipment becomes equal to or more than a target heating amount necessary for elevating the total amount of water in the hot water storage tank to a preset hot water delivery temperature. The circulating pump is continuously operated after extinguishing the burner, until an accumulated circulated water amount of a circulating path becomes equal to or more than a predetermined water amount set to be equal to or more than a capacity of the hot water storage tank.

The invention relates to a floor drain comprising a drain compartment having a bottom, at least one side and an open upper portion. The bottom and the at least one side together define a space to collect waste water. The bottom comprises an opening for a drain trap. The floor drain further comprises a heat exchanger element, receivable in the space of the drain compartment, for transferring heat present in the waste water to fresh water. The heat exchanger element is provided with a first connection and a second connection. The first connection and the second connection are arranged inside the space of the drain compartment. A first conduit is connected to the first connection and a second conduit is connected to the second connection.

A combination boiler provides heated water to a boiler loop and heated domestic hot water (DHW) to a DHW loop. A primary heat exchanger is connected to the boiler loop. A burner provides heat to the primary heat exchanger and an input fan supplies a fuel and air mixture to the burner. A secondary heat exchanger transfers heat energy from the boiler loop to a domestic water loop. A controller determines a boiler loop flow rate. The controller measures an input temperature of the boiler loop, an output temperature of the boiler loop, and a DHW output temperature of the domestic water loop. The controller determines a DHW input temperature and estimates a DHW flow rate. The input fan speed is initiated or operated according to a required heat output of the burner corresponding to the DHW flow rate.

Heat exchanger for a high efficiency hot air heating appliance (1), with at least one segment (5) and with a primary section (14) and, viewed in the flow direction (A), followed by a secondary condensing section (15), whereby the segment (5) consists of at least one primary element (16) and at least two secondary condensing elements (19), that form part of the secondary condensing section (15) of the segment (5), and the inputs (20) of each of them are connected in parallel to the output (18) of the primary element (16) in such a way that the gas flow coming from the primary element (16) is divided over the secondary condensing elements (19) connected to it.

The invention discloses an urban heat supply network intelligent balance control system and method. The system includes a first adjustment component, a second adjustment component, a plate type heat exchange unit, and a control cabinet. A first regulating valve is arranged on a one-time water supply pipeline, a first temperature sensor is arranged on a one-time water return pipeline, a second regulating valve and a second temperature sensor are arranged on a second-time water supply pipeline, a third regulating valve is arranged on a bypass pipeline, each valve is adjusted according to the temperature value, the adjustment of a one-time network and the adjustment of a second-time network are separated, the adjustment of the one-time network is realized by relying on the return water temperature of the one-time network, the adjustment of the second-time network is realized by relying on the second-time supply water temperature, when the requirement of the second-time supply water temperature changes, the hydraulic working conditions of the one-time network is unaffected, stability of the hydraulic working conditions of the one-time network is ensured, decoupling operation of the one-time network and the second-time network is realized, and the problem of hydraulic disorder of the one-time network and the second-time network is solved.

A nonvolatile semiconductor memory includes a cell array, redundancy array, erase circuit, timer, and controller. The cell array has a plurality of memory cells. The redundancy array has a plurality of redundant cells capable of replacing the memory cell. The erase circuit performs an erase operation on a target cell including the memory cell or the redundant cell. The timer measures the time elapsed from the start of the erase operation performed for the target cell by the erase circuit. The controller stops the erase operation and replaces the target cell with the redundant cell, when detecting that a predetermined time has elapsed from the start of the erase operation by the measurement of the elapsed time by the timer.

A heat exchanger has an exchanger unit, including at least one first coiled conduit and one second coiled conduit that are substantially coaxial, and a casing for housing the exchanger unit. The casing has a first end wall, a second end wall, and a peripheral part between the two end walls. Each conduit has an inlet and an outlet, where the outlet of the first conduit is connected substantially in series to the inlet of the second conduit. The exchanger unit is supported by the first end wall of the casing, with the inlet of the first conduit and the outlet of the second conduit which are substantially at the first end wall of the casing.

A heat pump type hot water supply apparatus includes a heat pump unit 2 for heating water, a hot water tank 1 for storing therein hot water heated by the heat pump unit 2, and a hot water supply heat exchanger 10 which is placed substantially over a vertical entirety of interior of the hot water tank 1 and in which water flows from lower side toward upper side. Water that has flowed out from the upper side of the hot water supply heat exchanger 10 is discharged out from the top portion of the hot water tank 1.

A screw-in heat exchanger which is adapted to a dedicated heating element receptacle, commonly found on domestic electric hot water heater tanks, which allows a tank's water to be heated or cooled while circulating a hot or cold heat transfer fluid through the heat exchanger.

The invention relates to a warmer and a preparation method thereof, in particular to a valley electricity heat-storage warmer and a manufacturing method thereof. The upper ends and the lower ends of heat-dissipation tubes separately penetrate through an upper connecting plate and a lower connecting plate of a liner, an oil guiding tube is arranged in space between every two adjacent heat-dissipation tubes, the oil guiding tubes are connected with an oil tank, and the residual space of the liner is filled with a paraffin and expanded graphite composite phase-change material. The two ends of themultiple heat-dissipation tubes separately penetrate through the upper connecting plate and the lower connecting plate in a connection manner, each oil guiding tube is arranged in the space between the two corresponding adjacent heat-dissipation tubes, and the oil guiding tubes and the oil tank form a closed cycle so as to connect the optional three of a front connecting plate, a rear connectingplate, a left connecting plate and a right connecting plate which form the liner with the upper connecting plate and the lower connecting plate; after the liner is filled with the paraffin and expanded graphite composite phase-change material, a closed space is formed finally; and the liner is placed in a shell, and space between the liner and the shell is filled with a foaming heat-insulation material. Compared with the prior art, the valley electricity heat-storage warmer has the advantages that part of heat energy is stored during heating, and then the heat storage is facilitated so as to be capable of continuing to supply heat.

The invention discloses a phase change electric heat storage heating system with working-condition-based PID and self-adaptive feedforward compensation and a method. The system includes a wind circulation system and a water circulation system, and the water circulation system and the wind circulation system exchange heat through a heat exchanger, and output heating hot water. The wind circulationsystem includes a frequency conversion fan (1), a lower air duct (3), a phase change regenerative furnace (4) and an upper air duct (5). A working-condition-based PID and self-adaptive feedforward compensation control strategy can control the phase change electric phase change heating system according to the working conditions of the system, the problem that when the heating system working conditions are changed, traditional single closed-loop control is difficult to adapt to dramatic changes in system parameters is solved, and the feedforward compensation can quickly suppress deviation causedby furnace temperature disturbance. When adopting the working-condition-based PID and self-adaptive feedforward compensation control strategy, a water supply temperature fluctuation range is small, and the problem that the heating control stability of the phase change heat storage heating system is not high is solved.

The invention discloses a light gathering and frequency division type solar sludge drying system and a sludge drying method thereof. The light gathering and frequency division type solar sludge dryingsystem comprises a solar energy utilization module, a sludge drying module and a household heating module, wherein the solar energy utilization module comprises a frequency division heat accumulationpart and a power distribution control part; the frequency division heat accumulation part comprises a light gathering device 1, a photovoltaic cell 2, a frequency divider 3, a vacuum heat collectingpipe 4, a photovoltaic cell waste heat collecting pipe 5, a phase change heat storage box 6 and a heat exchanger 7; a first pump 29 drives a heat carrier to flow in a heat carrier circulating flow path composed of the vacuum heat collecting pipe 4, the photovoltaic cell waste heat collecting pipe 5 and the heat exchanger 7; and a sludge drying chamber 8 comprises an air inlet 25 for feeding hot air generated by the frequency divider 3 through a fan 20, a sludge inlet 26 for feeding the sludge to be dried, an air outlet 27 for discharging the hot air and a sludge outlet 28 for discharging the dried sludge.