Water dispenser hotel

Comparative case analysis of traditional boiler and energy-saving boiler before purchase

The energy-saving project of water heater in Beijing Xuanwu Hospital of Traditional Chinese Medicine is mainly distributed in the inpatient building of the hospital. At present, the type of water heater in use is traditional numerical control electric water heater, and the power is mainly 12KW.

Before the renovation of water heater energy-saving project, Beijing Yaneng Lijie Trade Co., Ltd. conducted a sampling (hospital inpatient department) energy consumption test according to the actual application of the traditional numerical control electric water heater in use.

Table 1: Sampling Inspection Table for Raw Water Boiler in Hospital

Type of water heater Basic parameters of water heater Energy consumption value of boiling water consumption test cycle

Traditional numerical control electric water boiler (insulated water tank type) AC 380/12kw; The boiling water 100L/H is about 40L/D (liter/day of boiling water). Normally open (repeatedly boiling water (6 times per hour) for 5 days, 288 kWh.

As can be seen from the table, the rated power consumption of the existing traditional water boiler is 288 kWh per week (5 days), so the estimated annual power consumption and consumption of this single water boiler are as follows:

Wt 1=Wo×Aw=288 degrees× 52 cycles = 14976 degrees (annual rated total power consumption of a single unit)

According to the analysis of parameters such as water consumption and water consumption cycle, we suggest that the staged instant energy-saving water heater be selected for energy-saving transformation of this project, for the following reasons:

(1), the main reason to avoid engineering energy consumption-insulation energy consumption. Step-by-step energy-saving water heater adopts the principle of step-by-step use, which can continuously produce boiling water without repeated heating when water is not used, thus minimizing energy consumption.

② Factors of healthy drinking water. The hospital itself belongs to the aristocratic class and pays more attention to water hygiene. No matter the traditional type or the stepped type, there is a water tank to keep warm, and the boiled water will be heated repeatedly or heated again the next day for drinking. From the perspective of healthy drinking water, nitrite is easy to breed, which is not conducive to the concept of health. The instant water heater burns as much as possible and drinks fresh water at all times, which fundamentally solves the problem of boiling water and relieves the psychological obstacles of staff and patients.

According to the previous test method, under the same conditions, the test results of Yaneng Lijie walking-step hot water boiler are shown in Table 2:

Table 2: The same environmental test table of Yaneng Lijie energy-saving water boiler in 2:XX Hospital.

Type of water heater Basic parameters of water heater Energy consumption value of boiling water consumption test cycle

EK-J 120 instant energy-saving water boiler ek-j120/12kw; The open water volume is 140L- 160L/H, which is about 40L/D (liter/day of boiling water), and it lasts for 5 days, 16kW.

As can be seen from the table, the rated power consumption per week (5 days) of a single energy-saving boiler of Yaneng Lijie is 16 kWh, so the estimated annual power consumption and consumption of this single boiler are:

Wt2=Wo×Aw= 16 degrees× 52 cycles =832 degrees (annual rated total power consumption of a single unit)

Economic and social value of energy saving in this project (30 units are planned in this project)

The annual power consumption and energy consumption cost of the traditional electric water boiler are: 288 degrees× 52 cycles = 14976 degrees; 14976 degrees× 0.876 yuan/degree (general lighting) = 13 1 18.9 yuan RMB.

The annual total energy consumption of raw water boilers in this energy-saving project is:131kloc-0/8.9 yuan× 30 units = 393,569.2 yuan.

The annual power consumption and energy consumption cost of Yaneng instant energy-saving water boiler are 16 degrees× 52 weeks =832 degrees respectively; 832 degrees ×0.876 yuan/degree (general lighting) =729 yuan.

The annual total energy consumption of Yaneng Lijie instant energy-saving hot water boiler is: 729 yuan× 30 sets = 2 1.870 yuan RMB.

Economic value: energy consumption before transformation-annual energy consumption after transformation = 393,569-21870 = 371699 yuan.

It can be seen that the cost savings reached 94%.

Social value: total energy consumption before transformation-total energy consumption after transformation = 449,280-24,960 = 424,380 kWh.

It can be calculated from the conversion table of energy saving and emission reduction ratio.

A, energy unit conversion table

1 kWh) = 3600000 joules, and the definition of standard coal is that any fuel that can generate 29.27mj heat (low level) is equivalent to 1kg standard coal. In this way, how much electricity can be generated theoretically by one kilogram of standard coal (that is, under the condition of complete energy conversion). But in fact, because it is impossible to completely transform, it will definitely be lower than the theoretical value. The data provided by the National Development and Reform Commission are:

The average coal consumption of thermal power plants is 1 kwh (1 kwh), which has dropped from 392g standard coal in 2000 to 360g standard coal and will reach 320g standard coal in 2020.

In other words, one kilogram of standard coal can generate three kilowatt hours (3 degrees) of electricity.

Second, the emission calculation standard number reference

According to experts' statistics, for every 1 kWh saved, 0.4 kg of standard coal, 0.785 kg of carbon dioxide (equivalent to 0.9) and 0.0263 kg of sulfur dioxide (equivalent to 0.03) are saved.

Then the hospital will save about 424,380 * 0.4 =169,728 kg =169 tons of standard coal a year, reduce 424380 * 0.785 = 299824kg = 299 tons of carbon dioxide emissions, and reduce 424,380 * 0.03 = 65438+.

Energy consumption and energy-saving rate of Li Jieya Neng EK-B90 step-by-step energy-saving water boiler.

Basic situation of using environment:

The ambient temperature is 20 degrees Celsius.

0.8 yuan/kWh for electricity and 3 yuan/ton for water.

Calculated according to 12 hours per day.

Basic information of the employing unit:

Average daily water consumption 100L, 200L and 300L.

Take water from cups, kettles and buckets.

At present, the old-fashioned water boiler is 9KW, with boiling water 100 l/ hour.

Basic situation of old-fashioned water boiler:

1 kwh boiling water 10L, and then boiling water 100L, with power consumption of 9 kwh.

The volume of the tank liner is 80L.

(When the ambient temperature is 10 degrees Celsius in winter) 1 hour, boiling water for 6 times, from 80 degrees to 95 degrees each time, requires additional energy consumption of 6 *15 * 9/(95-20) =10.8 degrees.

Boiling water for three times (from 80 degrees to 95 degrees each time) 1 hour requires additional energy consumption of 3* 15*9/(95-20)=5.4 degrees.

Take boiled water 10L, and pour cold water from the top of the water tank. 1 day (12 hours) will be yin and yang at least twice, and the water temperature will instantly cool to 80 degrees. The extra energy consumption is 2*20/80*9=4.5 degrees.

Basic situation of energy-saving water boiler:

1 kwh of boiled water 12.5L

Step-by-step water boiler, if the power consumption is calculated according to the actual water consumption, it will take 9 degrees to build a 1 10L water boiler.

There is no repeatedly boiled water, and there is no yin and yang water.

Step-by-step energy-saving water heater 9KW, water heater 1 10L/ hour.

Step-by-step energy-saving water heater has no boiling water, but it will produce extra heat preservation. The power consumption of heat preservation changes with the change of water consumption. The more you use it, the shorter the actual heat preservation time will be. If the daily average water consumption is between 100L-300L, the heat preservation consumes 2-4 degrees of electricity.

To sum up: According to the hospital situation, the theoretical energy consumption (in winter) is as follows:

Then the energy consumption of the old boiler burning the boiler 100L is:

The energy consumption of the old boiler is 10.8+4.5+9=24.3 degrees.

Boil 200L of water every day, and the theoretical energy consumption value is as follows:

The energy consumption of the old boiler is 10.8+4.5+ 18=33.3 degrees.

Boil 300L of water every day, and the theoretical energy consumption value is as follows:

The energy consumption of the old boiler is 10.8+4.5+27=42.3 degrees.

Theoretical energy consumption (summer) is as follows:

Then the energy consumption of the old boiler burning the boiler 100L is:

The energy consumption of the old boiler is 5.4+4.5+9= 18.9 degrees.

Boil 200L of water every day, and the theoretical energy consumption value is as follows:

The energy consumption of the old boiler is 5.4+4.5+ 18=27.9 degrees.

Boil 300L of water every day, and the theoretical energy consumption value is as follows:

The energy consumption of the old water boiler is 5.4+4.5+27=36.9 degrees.

The energy consumption of Yaneng Lijie step-by-step energy-saving hot water boiler is as follows:

Daily boiling water 100L:9+4= 13 degrees.

Boiling water is 200 l per day:18+3 = 21degree.

Boil water 300 l per day: 27+2 = 29 degrees.

According to the hospital energy consumption calculation, the summer calculation standard is as follows:

Theoretical daily energy consumption value:

Water heater category test season daily water consumption 100L energy consumption daily water consumption 200L energy consumption daily water consumption 300L energy consumption.

Winter old water boiler 24.3 33.3 42.3

Old boilers in summer 18.9 27.9 36.9

Yali Nengjie Water Heater 13 2 1 29 is open all year round.

To sum up:

Compared with the traditional boiler EK-B90, the energy-saving rate of Yaneng Lijie step-by-step energy-saving boiler is as follows:

Energy saving effect of seasonal water use

Winter effect100l/day 46%

200 liters/day 36%

300 l/d 3 1%

Summer effect 100L/D 3 1%

200 liters/day 24%

300 l/d 2 1%

As can be seen from the table, compared with the old traditional water boilers, Yaneng Lijie multi-stage water boilers can save up to 46% energy and the lowest energy consumption can save up to 265,438+0%.

The maximum power saving of single machine is 16 kwh, and the minimum power saving is 6 kwh. The average annual energy saving rate is 33%.