What kind of heating method is better in areas without central heating

For heating in rural areas, industrial and mining enterprises, and buildings, the first choice is to use gas supply pipes, but for those far away from central heating pipes, the current heating methods include solar-assisted electric heating, gas condensing wall-hung boiler heating, and air-source heat pump heating.

 

1. Solar-assisted electric heating and heating: Solar-assisted electric heating and heating utilizes solar radiation during the day, which is converted into heat by the collector plate for use by the system. When the heat load of the system is insufficient, it is provided by the electric heater.

2. Gas condensing wall-hung boiler for heating: Gas-fired wall-hung boiler is more suitable for heating in areas where gas pipeline networks have been built, otherwise the cost of using canned gas is relatively high.

3. Air source heat pump heating: Air source heat pump technology is an energy-saving and environmentally friendly heating technology. It obtains low-temperature heat sources through natural energy and becomes a high-temperature heat source after efficient heat collection and integration of the system. It is used for heating or hot water supply. The entire system integrates High thermal efficiency. Through the actual investigation of coal-to-electricity projects, it is found that the COP of air source heat pump heating in winter can reach about 2.5.

 

Select rural houses for research. The main functional rooms of a typical single-storey rural house include bedrooms, living rooms, kitchens, bathrooms, etc., with a construction area of about 120 square meters. Calculate the initial investment and annual heating costs of three clean heating technologies including solar-assisted electric heating, gas condensing wall-hung boiler heating, and air source heat pump heating. For comparison, the relevant data of traditional scattered coal heating are also calculated.

(1) Comparison of initial investment

Equipment cost: solar-assisted electric heating> air source heat pump heating > gas wall-hung boiler heating > electric boiler > coal-fired boiler

(2) Comparison of heating costs

Heating costs: electric boiler > solar assisted electric heating> air source heat pump heating > coal-fired boiler > gas condensing wall-hung boiler.

(1) Although the gas condensing wall-hung boiler heating system has the lowest initial investment, it is more suitable for areas where gas pipeline networks have been built.

(2) Among the three clean heating methods, the gas condensing wall-hung boiler (note that it is not a gas-fired wall-hung boiler) has the lowest cost. Air source heat pump heating is more suitable for rural heating without gas pipelines.

(3) Both the initial installation cost and the annual operating cost of air source heat pump heating are slightly higher than those of traditional scattered coal furnace heating. But lower than municipal central heating.

(3) Combination of new heating technologies

The current transformation methods are single transformations, either without electricity or gas, in fact, they ignore the auxiliary heating effect of solar energy. The air source heat pump absorbs the cold and heat of the air. Solar energy harnesses the energy of light. Rural households, enterprises, and individual buildings with conditions can add solar energy. Traditional solar energy auxiliary heating uses electric heating rods, which leads to a substantial increase in operating costs. In fact, condensing gas boilers or air source heat pumps are used as auxiliary heat. The operating cost will drop to 70% of the current single cost, and the investment cost will not increase. It can be directly used for bathing or kitchen and bathroom hot water without heating in summer. It's just that the combination technology is a bit complicated, but we have a very solid experience and can completely solve it.

(4) Transformation of indoor heating facilities:

Traditional indoor heating uses heating or floor heating, which can only heat, not cool. And it cannot be controlled by time period, room and temperature. Now the fan coil unit can be used for heating and cooling and can be controlled by time, room and temperature. That is to say, when it is used, it is turned on, when it is not used, it is turned off, and the temperature can be controlled at will. Reduced equipment output rate. It saves resources and saves money, so it is very important to transform indoor facilities.

(5), comparison between air source heat pump and air conditioner:

The initial installation cost of air source heat pump is slightly higher than that of air conditioner. But the operating cost is only 25% of the air conditioner. Because the water cooling and heating technology is more comfortable than the air cooling technology of the air conditioner. And no harm.

(6) Comparison of low-nitrogen condensing boilers with traditional wall-mounted gas furnaces:

The traditional gas-fired wall-hung boiler adopts the fire row direct-firing technology, and the nitrogen emission exceeds the standard. More than 150 mg. continue to cause air pollution. Low thermal efficiency results in large gas consumption. Increase the user's heating costs. The nitrogen emission of the low-nitrogen condensing boiler is less than 30 mg, which meets the requirements of environmental protection, and the thermal efficiency is 1.3 times that of the traditional wall-hung boiler, and the operating cost is equivalent to the cost of coal combustion.

 

To sum up: for heating in villages and industrial and mining enterprises without central heating, the first choice is air source heat pump heating.