planning:building_services:heating_and_dhw:experience_with_drain_water_heat_recovery:start
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| planning:building_services:heating_and_dhw:experience_with_drain_water_heat_recovery:start [2014/09/18 18:19] – external edit 127.0.0.1 | planning:building_services:heating_and_dhw:experience_with_drain_water_heat_recovery:start [2019/02/21 11:09] (current) – cblagojevic | ||
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| * These simple, passive systems can be planned and installed with little chance of mistakes. | * These simple, passive systems can be planned and installed with little chance of mistakes. | ||
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| * Total hot process water consumption can be decreased by 25 to 35 percent. | * Total hot process water consumption can be decreased by 25 to 35 percent. | ||
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| * Not much space is needed, and a variety of systems is available for different installation situations. | * Not much space is needed, and a variety of systems is available for different installation situations. | ||
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| * The systems are already economically competitive with conventional hot water systems and will become even more so as they become more common. | * The systems are already economically competitive with conventional hot water systems and will become even more so as they become more common. | ||
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| * In bigger buildings, the nominal heat production output and storage tank size can be reduced. | * In bigger buildings, the nominal heat production output and storage tank size can be reduced. | ||
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| * Data measured in accordance with standardized procedures are available. | * Data measured in accordance with standardized procedures are available. | ||
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| * There is already a calculation method for easily determining expected savings in specific cases (see AkkP49).\\ | * There is already a calculation method for easily determining expected savings in specific cases (see AkkP49).\\ | ||
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| * Savings are highest when the heat exchangers supply both cold and hot shower water. | * Savings are highest when the heat exchangers supply both cold and hot shower water. | ||
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| * If cold water connections from multiple showers are connected to the same heat exchanger, cold showers may not be possible. | * If cold water connections from multiple showers are connected to the same heat exchanger, cold showers may not be possible. | ||
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| * If the heat exchanger is only connected to the hot water connection, high hot water temperatures can significantly reduce the utilization rate. | * If the heat exchanger is only connected to the hot water connection, high hot water temperatures can significantly reduce the utilization rate. | ||
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| * If the heat exchanger is only connected to the cold water connection, hardly any heat will be recovered in the case of low hot water temperatures. | * If the heat exchanger is only connected to the cold water connection, hardly any heat will be recovered in the case of low hot water temperatures. | ||
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| * Heat exchangers that replace part of a downpipe must be installed in a completely vertical position. | * Heat exchangers that replace part of a downpipe must be installed in a completely vertical position. | ||
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| * Pressure losses can be relatively high in some systems because thin pipes improve heat transfer and down times. | * Pressure losses can be relatively high in some systems because thin pipes improve heat transfer and down times. | ||
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| * A thermostatic mixing valve is recommended to prevent pressure losses and fluctuating cold water temperatures.\\ | * A thermostatic mixing valve is recommended to prevent pressure losses and fluctuating cold water temperatures.\\ | ||
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planning/building_services/heating_and_dhw/experience_with_drain_water_heat_recovery/start.1411057157.txt.gz · Last modified: 2014/09/18 18:19 by 127.0.0.1