Provide a hot water project design, to give you a reference:
A basic introduction to the project
1. Project Overview
The building for the Zhanjiang City XX unit, the design of the daily water consumption of 2 tons, choose 2 tons of water tanks, water supply using pressurized water supply, hot water design back to the water.
2. Geographic location and climate
Zhanjiang average annual temperature of 23.2 ℃, the highest in July, the monthly average of 28.9 ℃, the highest had reached 38.1 ℃; January the lowest, the monthly average of 15.5 ℃, the lowest had reached 2.8 ℃. The temperature is pleasant, the grass is evergreen, and there is no frost or snow all year round. The average annual precipitation is 1417-1802.
3. Design Concept
3.1 Adopting the principle of integrated design, the whole process from the project to the construction design, the comprehensive consideration of the user's building, the use of the working conditions, air-source heat pump specifications and performance parameters, the system configuration and mode of operation, the use and maintenance, energy saving and safety, and economic benefits should be in line with the project system The design principle of the engineering system.
3.2 Strive to make the air-source heat pump effect the best, minimize the consumption of electricity, so as to achieve the purpose of cost savings.
3.3 The system design of advanced, safety, reliability, durability and other comprehensive consideration.
3.4 Better economic and social benefits, to provide a reliable set of hardware facilities for customers in environmental protection, energy saving, civilized water, bathing grade.
4. System operation mode
4.1 The start and stop of all units of the system are controlled by the water level switch in the domestic hot water tank. When the tank level is lower than SL2, the unit turns on the water intake; when the tank level is higher than SL1, the unit turns off the water intake.
4.2 When the water temperature in the tank is lower than the set temperature, the thermostatic pump turns on and the main unit turns on to raise the water temperature.
4.3 Hot water supply adopts pressurized water supply.
4.4 The water tank is equipped with low liquid level protection, when the liquid level is lower than SL3 low liquid level, the forced water replenishment solenoid valve opens, forced water replenishment; when the liquid level reaches SL1 high liquid level, the system returns to normal.
5. Design basis
Building Water Supply and Drainage Design Manual
Code for Building Water Supply and Drainage Design (GB50015-2003)
Design Code for Building Water Supply and Drainage and Hot Water Supply
National Architectural Standard Design Atlas for Water Supply and Drainage
Commercial or Industrial and Heat pump hot water heater for commercial or industrial use and similar purposes (GB/T 21362-2008)
Selection and installation of heat pump hot water heating system (06SS127)
Heat pump product samples and manuals (TIANSHU ELECTRICAL CO.,LTD.
Operating data of heat pump intelligent environment simulation laboratory (TIANSHU ELECTRICAL CO.,LTD.
Data provided by the customer
6. Design parameters
Cold water temperature in the coldest month: 10℃
Maximum water supply temperature for hot water: 55℃
Maximum daily water consumption: 2m?
Specific heat of water: C=4.187KJ/kg.℃=1kcal/kg.℃;
7. Description of the design calculations
7.1 Hot water Load design calculations:
1) Maximum daily water consumption Mmax = water unit (52 people) × water consumption per person per day (40L) = according to the user's requirements for normal water supply of 2 tons per day;
2) Design of the maximum load of hot water: 2 tons / day
3) Maximum daily load of hot water: Q total = cm △ t = 1 cal/g.℃ ×2000kg × (55-15) ℃ = 8 × 104kcal = 8 × 11.63 = 93.04kw;
Where: C - specific heat of water 1 cal/g. ℃ = 1 kcal/kg. ℃
M - hot Water volume kg
△t - water temperature rise (℃) to take the lowest tap water temperature of 15 ℃,
11.63 - 1 × 104 kcal/h = 11.63kw
Air source heat pump hot water Selection
According to the customer's requirements, we have selected one Tianshu KRS-220/G-A01.
Basic operating parameters:
One Tianshu KRS-220/G-A01 air-source heat pump hot water mainframe at an ambient temperature of 10 ℃ power output P1 is 7.41KW,
Designed for heat pumps in the most unfavorable ambient temperature of 10 ℃, the inlet water temperature is 12 ℃, the inlet water temperature is 12 ℃, the inlet water temperature is 12 ℃, the inlet water temperature is 12 ℃, the inlet water temperature is 12 ℃, the inlet water temperature is 12 ℃.
One TIANSHU KRS-220/G-A011 air-source heat pump in the design working time
The total output power is P=P1×h=7.41×13=96.33KW＞93.04KW
Where:
Total output power(KW): ----- output power (KW)
P1---- mainframe input power (KW)
H---- in the most unfavorable environment of 10 ℃, the cold water temperature of 12 ℃, the design of the heat pump working time per day (hours) h = 13 hours
Conclusion:
1), according to the above calculations, the selection of 1 set of KRS-220/G-A01 air source type heat pump water heater unit, can fully meet the Zhanjiang City, Chikan District, Mr. Liang private hotel hot water supply requirements.
2), in the most unfavorable ambient temperature of 10 ℃, the cold water temperature of 12 ℃, the actual heat pump day working time of 13 hours. With the rise of ambient temperature and water temperature, the working time will be further shortened.
Two, product introduction
1. unit working principle
Heat pump is the use of equipment within the heat-absorbing medium (refrigerant) from the air or the natural environment of the collection of heat energy, compressed by the compressor to increase the temperature of the refrigerant, and through the heat exchanger refrigerant heat release heating cold water, while discharging the cold, the hot water produced through the water circulation system to send the user for heating or directly for hot water supply.
A heat pump device mainly has evaporator (air heat exchanger), compressor, condenser (hot water exchanger) and the expansion valve consists of four parts, through the mass of the work is constantly completed evaporation (absorbing the heat in the environment) → compression → condensation (heat release) → throttling → evaporation of heat cycle process, so that the environment of the heat transferred to the water (as shown in the figure)
Heat pumps at work, the environmental media in the cold media release heat to heat cold water, while discharging cold air, the production of hot water through the water circulation system to the user for heating or directly for hot water supply. When working, the environmental media stored in the energy Q2 in the evaporator to be absorbed; it itself consumes part of the energy, that is, the compressor power consumption Q1; through the mass circulation system in the condenser exothermic Q3, Q3 = Q1 + Q2, it can be seen that the heat pump output energy for the compressor to do the work of Q1 and the heat pump absorbed from the environment in the heat of the Q2; therefore, the heat pump technology can save a lot of electric energy.
The heat pump is a heat pump that can save a lot of electricity.
The Tenshu heat pump unit can be operated 24 hours a day, 7 days a week, all year round, with convenient management, safety and reliability, without the need to set up a machine room and full-time staff, saving the annual labor costs, annual inspection costs, fuel procurement costs, etc., as long as a small amount of electricity can produce a large amount of hot water and does not produce any pollution, that is, responding to the national advocacy of the use of renewable energy, and also reflecting the managers of green, energy-saving, environmentally friendly awareness and ideas, the service life can be up to 10 years, and the heat pump can be used for a long time. The service life can reach more than 10 years.
2. Tianshu air source heat pump features
2.1 Personalized configuration, reasonable energy saving
Technical energy-saving increase 1/3 of the evaporator area in order to absorb the free heat in the low heat source, the heating efficiency (COP) up to 6.5, in regular operation than other hot water equipment to save 75% of the electricity, 40% of natural gas, gas and 50% of the running cost of diesel. diesel running costs.
System energy-saving each unit of the finalization of the national laboratory as many as 3,000 experimental tests, debugging and evaluation of the optimal configuration of the unit system and the most reasonable COP value of the unit.
The best regional energy-saving deployment of the industry's most complete regional temperature database for the four seasons, each type of unit factory for the local regional temperature characteristics of the four seasons debugging, in order to achieve the unit in a particular region to maintain the best operating conditions throughout the year.
2.2 Multiple protection, more peace of mind
System protection is equipped with high and low voltage protection, compressor overcurrent and overload protection, startup delay, water flow protection, high temperature water protection, and other multiple safety protections!
Electrical protection compressor overload protection, leakage protection, grounding protection, phase sequence protection, evaporation pressure is too high protection, exhaust gas is too high protection, in and out of the water temperature difference is too large protection, water temperature protection!
The factory inspection system pressure, halogen inspection, two halogen inspection, etc., to ensure that the factory of each unit 100% pass rate!
2.3 Leading technology, intelligent embodiment
High-impact convection anti-scaling design, electric separation of calcium and magnesium ions in the water, preventing condenser scaling, to ensure that the unit service life is extended!
Automatic energy regulator, automatic adjustment of seasonal climate temperature difference, to ensure normal and stable operation of the unit in all seasons, there will be no overloaded operation, more prolonged service life of the unit, and at the same time to achieve a higher energy efficiency ratio.
Microcomputer intelligent control, dual automatic control of water temperature and water level in the water tank, automatic circulation heating, not subject to weather conditions, can be operated all year round, without the need for special care, according to the user's water needs, to achieve timed, fixed-temperature water supply, can be set between 10 ℃ -55 ℃ freely set the water temperature.
2.4 Green products, **** enjoy environmental protection
Only a trace of electricity drive, low energy consumption, heat pump unit operation process without any pollutant emissions, in line with the national requirements on energy use, environmental protection, belong to the green environmental protection products.
2.5 Excellent quality, optimized system
Select the world's leading brands of high-temperature compressor, ALCO (ALCO) expansion valve, intelligent chip, optimized by the company's technical staff to ensure that the unit system operates optimally, and at the same time extend the service life of the unit to more than 10 years.
High-efficiency four-way valve frost, an effective solution to the winter unit evaporator frost blocking the host "dead" problem, the evaporator selection of high-quality materials to reduce the probability of frost, to ensure that the unit even in the cold winter as the same stable operation.
2.6 Professional installation, easier
Professional installation feasibility report program, professional installation engineers to guide the installation, professional installation team, excellent products by the professional embodiment.
Simple installation, not affected by residential floors, does not occupy permanent floor space, no need for light, can be widely installed on the roof, balcony, basement and other ventilation places, do not need to erect complex and expensive specialized piping projects, easy to arrange.
4. Working parameters of the unit
Current product model DKFXRS-9II 01
Note: 1. Nominal working conditions of the ordinary type: ambient dry-bulb temperature of 20 ℃, wet-bulb temperature of 15 ℃, the initial temperature of 15 ℃, termination of the water temperature of 55 ℃.
2, low-temperature type nominal working conditions: ambient dry bulb temperature of 7 ℃, wet bulb temperature of 6 ℃, the initial temperature of 9 ℃, the termination of water temperature 55 ℃.
3, the maximum load conditions: ambient dry bulb temperature of 43 ℃, wet bulb temperature of 26 ℃, into the water water temperature 55 ℃.
5, the main configuration of the heat pump host list
a, compressor: the world famous brand Copeland ZW heat pump compressor.
b, expansion valve: the use of the United States famous brand ALCO (AICO)
c, condenser: with a national patent casing heat exchanger.
d, evaporator: high-efficiency heat exchanger specially designed for heat pump water heaters.
e, chip: selected chips produced by the U.S. Motorola.
f, SIEMENS (Siemens) overload protector and contactor
Three, heat pump and conventional energy comparison
1, running cost analysis
The following is calculated in accordance with the use of 2 tons of water every day, the daily heat required for a fixed value. The calculated cost is only a heating cost, excluding return water heating, system heat loss.
Zhanjiang average annual temperature of 23.7 ℃, the average temperature of cold water 15 ℃. Electricity price 0.9255 yuan/kW-h (not considering peak and valley electricity prices); natural gas calorific value of 8600kcal/m?, thermal efficiency of 80%, the unit price of 4.5 yuan/m?; diesel calorific value of 10,200kcal/kg, thermal efficiency of 85%, the unit price of 5.5 yuan/kg.
The ambient temperature of 20 ° C, the heat pump's average COP value of 4.02
The average COP value of 2 tons of water daily, according to the formula, the average daily water temperature of 15 ° C, cold water. According to the formula to calculate the daily heat consumption of 2 tons of water is: 93.04kw.
1) Using heat pump system
93.04kW ÷ 4.02 × 0.9255 yuan/kW-h × 365 days = 7818.31 yuan
Annual operating costs: 7818.31 yuan
Costs per ton of water: 10.71 yuan
2) Using gas boiler
94277.6625kcal÷8600kcal/m?÷80%×4.5 yuan/m?×365 days=22507.42 yuan
The cost of each ton of water is: 30.8 yuan
3) Using oil boiler
94277.6625kcal÷ 10200kcal/kg÷85%×5.5 yuan/kg×365 days=21829.57 yuan
The cost per ton of water is: 29.9 yuan
2. Analysis of the payback ratio
Heat pump heating cost per ton of hot water is only 10.71 yuan, and the annual operating cost is 0.7818 million yuan; gas boiler heating cost per ton of hot water is 30.8 yuan, the annual operating cost of 22.507 million yuan; oil boiler heating per ton of hot water costs 29.9 yuan, the annual operating cost of 21.829 million yuan. The heat pump system has unparalleled advantages.
3. Conclusion
1) Oil and gas boilers have the advantages of fast heating and large water output, but it uses oil and gas as fuel, requires fuel delivery piping, and must pass fire safety inspection and acceptance, and the use of the process of insecurity, and the combustion process will pollute the surrounding air, and the oil and gas boilers need a special machine room, which occupies indoor space. Specialized management, and the boiler should be regularly inspected by the technical supervision department. Compared with heat pump water heaters, their operating costs are higher. Air-source heat pump water heaters run fully automatically, without the need for manned, but also to save some of the management costs.
2) Electric boilers have easy to use, can adapt to any weather changes, but need a special machine room, occupies indoor space, easy to scale, the operation of the process of power consumption is great, a great waste of electricity, high operating costs. Now the market new electric water heater built-in anode magnesium rod descaling device to solve the problem of easy scaling of the product, but the anode magnesium rod must be replaced once every two years, bringing trouble to the maintenance.
3) The heat pump water heater unit is not restricted by weather conditions, easy to use, does not occupy indoor space, the system operates without any safety hazards, absolutely safe and environmentally friendly, the service life can be up to 15 years or more, the equipment has a stable performance, and can be unmanned operation (fully automated intelligent control). Although compared with other heating systems, the initial investment is relatively high, but the heat pump water heater unit only requires very low operating costs, coupled with the preheating of the solar energy system, the operating costs of the entire system has dropped significantly, the user only needs to run for a short period of time can be fully recovered from the initial investment.
Four, the total budget of the air heat pump project
Five, the owner with the content
In order to cooperate with the project's planned schedule for the various stages of the work carried out, the bidder must specify the need for the owner to cooperate with the content of the work (including delivery, storage of goods, storage, engineering, commissioning, acceptance, etc.) and specific requirements.
1, the owner should be improved in advance of the day surface, fully delivered at the time of entry into the construction.
2. The road through which the crane passes shall be completed before entering the site, and the position of the crane shall be well leveled and able to bear the weight of the crane.
3. Provide working power and water source.
4, the delivery of the owner to send a person to the scene, *** with the unpacking, inspection.
5, Placement of temporary warehouse to place the goods, and send a person responsible for the safety of goods.
6, the goods placed in the requirements of dry, ventilated air, and away from dangerous flammable and explosive substances.
7, in the equipment into the field, to provide certain security services to ensure that the equipment is not damaged.
8, to ensure that the room hot water piping is in place, the return pipe is set up reasonably, with the effect of water return.
9, to ensure that the power distribution box meets the power requirements of the bidding equipment, to ensure easy access to electricity.
10, in the commissioning process, appoint a person to supervise.
11, after the completion of the project, after receiving our notice of completion of the amount of work, in no later than 7 days to arrange for acceptance of the work, and according to the actual determination of acceptance of the project.
Are you satisfied with the above answer?
Please adopt.