Before improved design the exhaust smoke heat loss is between 10.65% and 33.18% on 4 states, after improved design the exhaust smoke heat loss is between 7.58% and 17.07% on 4 states, after improved design 7.58～17.07% has been saved.
Ignition process of H2-O2(N2) mixture in an airtight system are simulated by using detailed chemistry, and ignition limits at different conditions of heat loss and ratio of fuel to oxidation are obtained.
From above formula an air temperature of equal H can be yielded by following equation assuming that the solar radiation is absent and the air is calm (V=.35 m/s), and we called this temperature The Equivalent Heat Loss Temperature (EHLT,℃). EHLT=15.948-5.2449H.
由此推导出无太阳辐射、无风情况下,H相同时的Ta,称为“等散热温度”(Equivalent Heat Loss Temperature,EHLT),EHLT=15.94-5.2449H。
This paper caculates the error caused by the lateral heat loss of the 1:1 calibrating device of heat flux meter,the system error can correct the calibrating result,so increase the precision of calibrating of the this device.
When heat-insulating layer's outer-radius is shorter than rc, with increasing of thethickness of heat insulation, the whole thermal resistance will decrease, so the heat loss will increase. If heat-insulating layer's outer-radius is bigger than rc, the whole thermal resistance will increase with the increasing of the thickness of heat insulation, so the heat loss will decrease.
The paper explains diffculty of charge for central heating after residential commercialization, reasonably designs and reforms the old heating system,installs heat flowmeter and temperature control valve every house, improves heat efficiency,reduces heat loss every link,makes user pay fees reasably according to heat value, and solves difficulty of charge for heating in real estate management.