Comparative analysis of natural gas boiler heating method
Comparative analysis of natural gas boiler heating method
Summary In this paper, three methods of heating gas boiler investment, operating costs, per unit area heating gas consumption and pollutant emissions, a comprehensive comparison. Results of the comparison surface, the user should be given priority on the residents use heating gas boiler wall, public buildings and commercial buildings should be given priority use of modular gas boiler heating, gas boiler heating region has to be spread, so most provincial natural gas consumption, pollutant emissions, at least, run lowest cost.
I. Introduction With the restructuring of urban energy, natural gas has become an important energy heating gas boiler heating. Divided into the following three forms: single-family home heating gas boiler, gas boiler heating distributed, centralized regional gas boiler heating, hot water heating is generally used.
Second, natural gas heating single-family Domestic gas boiler heating is to each household as a unit, using domestic gas boiler heating. Domestic gas-fired boiler for heating, bathing and water, are multi-type gas appliances.
1 Features Advantages: high efficiency domestic gas boilers, features and more. 1 1 as a system, while addressing the heating and hot water supply. Single-family gas hot water heating has great flexibility in the regulation of the use of completely independent, self-heating temperature can be adjusted, self-heating time can be controlled freely from room to room temperature control, no boiler room and outside the network of thermal heat loss, saving of foreign net capital investment. Consistent with the principle of charging according to the heat can be accurately measured gas consumption, gas consumption by the user independent control, with such high efficiency heating system (usually 90%), avoiding the central heating energy caused by an area of transition charges waste, which can promote the conservation of gas, so as to promote the use of clean fuels and create high-quality conditions. At the same time heating cycle, low power consumption to save energy and improve the utilization and use of gas pipeline cost.
Problem: the current domestic gas stove in the promotion of use, quality standards are not unified, perfect after-sales service, affecting the user's normal use; gas emissions is generally disorganized, resulting in local pollution; part of the operation of noisy gas furnace ; in cold northern areas much trouble to the user long-term freezing out; people are worried about their safety also.
2 heat consumption Domestic gas boiler heating efficiency of single-family owners, no heat waste. According to Beijing, Tianjin, sample survey, single-family heating gas consumption index for the 7 ~ 8m 3 / M 2 . Gas consumption of the main building impact indicators causes indoor temperatures to maintain the insulating properties and sealing, construction of the wall to the size, heating system operation mode and adjust the thermal efficiency of boilers, gas heating gas consumption than the other two methods.
3 Uses Way that heating is suitable for residential areas. During operation, the user requirements according to their own control heating temperature and run time, to carry out metering, save gas, while providing sanitary hot water, reduce emissions and lower operating costs.
Third, scattered gas boiler heating Dispersed into modular gas boiler heating heating heating and dispersion concentration, a construction unit, a building used as a gas boiler heating heating module (also known as cell-type gas heating). The use of multiple adjacent properties of the same room with a gas boiler room building called the distributed heating central heating, a heating network is characterized by a direct supply.
1 Features Advantages: building a flexible, gas boiler centralized management for easy maintenance. Heating each system size, easy to adjust and control. Building for the use of the same nature, especially in schools, offices and other public buildings, using this heating method to use according to building characteristics, to adjust the control of heating temperature and heating time, especially a short time without frost or freezing the area, according to rest time control of heating time is very effective. No one in the holidays or at night can reduce the heating temperature or stop heating, saving gas and running costs. Outside the small size of the network, without intermediate heat exchange station, or power consumption, heat loss is small, easy to overcome the hydraulic imbalance, energy conservation, integrated heating efficiency is usually 80% to 90%, the heating is distributed in Europe, the United States is a wide way for the popular heating. Flue gas emissions can be concentrated.
Disadvantages: take up a separate boiler room, boiler and boiler room heat loss can not be used. For residential buildings can not be directly realized metering, end without conditioning, when the room is overheated, the user side is not cooling off a small window heating, some heat loss, generally 8% to 15%, but lower than the regional gas boiler heating heating efficiency is lower than single-family heating, higher than the regional boiler heating. Boiler quantity management is decentralized. NOX higher than the total emission of gas-fired boiler for domestic heating.
2, heat loss Outside the network due to heat loss, the average heating temperature is also higher than single-family home heating gas boiler, the end of the current control devices are generally not equipped to generate some heat loss. Beijing is distributed according to sample heating gas consumption indicators 9-12m3/m2. Gas consumption of the main building impact indicators causes indoor temperatures to maintain the insulating properties and sealing, construction of the wall size, external network of heat loss, heating means for operation and boiler thermal efficiency.
3 Uses Way that heating public buildings, commercial buildings are suitable for residential heating and concentrated. During operation, according to the use of building control heating temperature and heating time, save gas, reduce pollution emissions, lower operating costs.
Fourth, regional heating A district heating A district or a district of more than a few buildings share a gas boiler room heating, use of secondary heating network, with intermediate heat exchange station, larger outside heat supply network. Heating area up to several million square meters, flue gas emissions at high altitude.
2 Features
Benefits: investment in more decentralized heating boiler province, enabling centralized management, maintenance and users can realize high-altitude emissions of pollutants. On coal to gas projects, can be used directly to existing heating pipe network system and the boiler room auxiliary equipment, saving the initial investment. Disadvantages: relatively low thermal efficiency, external network and
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