Abstract: By comparing, Corrotect's high-temperature heat pump drying unit is used in hotel and hotel as the drying equipment of bedding. The indoor end directly utilizes air-cooled condensing, high temperature of air outlet, energy saving, multi-stage temperature and Drying time setting, automatic wetting and other advantages, and my company to take into account the use of high humidity dryer place, drying equipment using stainless steel shell, has a good corrosion resistance. Compared with other traditional drying equipment (high energy-consuming, high-pollution drying equipment such as electricity, oil and gas), the use of this equipment can reduce the operating cost of hotel bedding drying, easy to operate and labor-saving Waste, and has a safety, environmental protection, energy saving effect.
Keywords: high temperature heat pump drying unit energy saving and corrosion resistant
introduction
Heat Pump Technology New energy technologies that have drawn much attention all over the world in recent years. "Heat Pump" is a kind of low-grade heat energy that can be obtained from the air, water or soil in nature. After the compressor works to provide high-grade Heat pump device. Since the 1970s, the heat pump industry has entered a golden age. Many countries in the world attach great importance to the research of heat pumps and have formulated plans for the development of large-scale heat pumps. Therefore, heat pump technology is also emerging in an endless stream. The heat pump uses are constantly being exploited and widely used in air conditioners And industry, playing a significant role in energy conservation and environmental protection.
At present, drying is an indispensable processing step in many industrial processes and agricultural products processing. With the development of economy in our country, people have higher and higher quality of life, more and more awareness of the protection of the environment, and increasingly depleted non-renewable energy (such as natural gas, coal and oil). The original fuel, coal and other high energy consumption, the use of high-pollution drying equipment has been severely restricted or even banned. Looking for an alternative to the old drying equipment, and safety, environmental protection, energy saving, it is more and more urgent. High temperature heat pump drying equipment in this environment came into being.
High-temperature heat pump dryer introduction
Heat pump is essentially a heat-lifting device, high-temperature heat pump drying unit using anti-Carnot principle, draw heat from the surrounding environment, and passed it to the heated object (the object of higher temperature), its working principle and cooling The same machine, are in accordance with the reverse Carnot cycle, the only difference is the operating temperature range.
High temperature heat pump drying unit working principle
High-temperature heat pump drying unit, the main fin-type evaporator (external), compressor, fin condenser (internal) and the expansion valve is composed of four parts, by continuous evaporation of the working fluid (to absorb heat in the outdoor environment ) → Compression → Condensation (release of heat in the indoor drying room) → throttling → re-evaporation of the heat cycle, so that the external low-temperature heat transfer to the drying room, the refrigerant under the action of the compressor in the system Internal circulation flow. It is in the compressor to complete the gaseous heating process (temperature up to 100 ℃), it enters the machine to release high-temperature heat heating and drying room air, while being cooled and transformed into a liquid state, when it runs to the machine After the rapid liquid heat absorption evaporation into gas again, while the temperature can be dropped to -20 ℃ ~ -30 ℃, then the heat around the air will be an endless stream of heat transfer to the refrigerant.
High-temperature heat pump drying unit at work, and ordinary air-conditioning and heat pump units, the absorption of low-temperature energy in the evaporator medium QA: It itself consumes part of the energy, the compressor power consumption QB: Through the working fluid circulation system in the Therefore, the efficiency of the high-temperature heat pump drying unit is (QB + QC) / QB, while the heating efficiency of other heating equipment is less than 1, so the high-temperature heat pump drying unit heats up Efficiency is far greater than the efficiency of other heating equipment, we can see that the use of high-temperature heat pump drying unit as a drying device can save energy, but also reduce emissions of CO2 and other pollutants to achieve energy-saving emission reduction results.
High temperature heat pump dryer use places
High temperature heat pump drying unit is suitable for the drying of hotel bedding, seafood, vegetable dehydration, AD black fungus, melon seeds, peanuts, fruits and vegetables, meat products, casings, tobacco leaves, leather, mushrooms, wolfberry, dried fruit, mosquito coils, Gong Incense, cloth, clothing, grain and grain, dried noodles, yuba, fertilizer, medicine, Chinese herbal medicine, paper products, wood, seeds, sludge, gypsum, hardware products, metallurgical products, mine byproducts, chemical products, FGD gypsum, , Forage, flue-cured tobacco, pulverized coal, slime, lignite and other drying. In industrial hot water, but also to meet the electroplating bath constant temperature, slaughterhouse hot water heating and insulation, star hotels hot water supply and high temperature hot water needs of industrial enterprises.
Project Overview
The project is to be "Wenchang Gangchang Building," the invitation, according to the hotel used bedding wash, as a result of bed linen washing frequency (once daily), the hotel original bedding drying and disinfection, Are sent to a dedicated laundry, the hotel also need to be equipped with specialized staff responsible for the distribution of bedding, not only a waste of labor, but also increase the drying and disinfection costs, in order to meet the normal business needs and reduce the cost of Huan wash. Xiamen Hong Kong Chang Building bedding wash process to improve. The hotel has a total of six floors, a total construction area of ​​about 3200m2, a total of 80 rooms, is located in Wenchang City, Hainan Province. Located in the east of Hainan Island, east of the South China Sea, Wenchang City belongs to tropical monsoon and humid marine climate zone, the annual average temperature of 24 ℃, the average annual rainfall of 2072 mm, the average annual sunshine 2155 hours, the average annual radiation of 118.99 kcal per square kilometer Frost-free snow throughout the year.
The current employer to reduce bedding costs Huan washing costs and reduce the waste of human resources based on the comprehensive use of Kelaiteike's high-temperature heat pump drying unit to the hotel bedding drying. The project put into use in January 2010, which has achieved good results in saving time, labor, money and environmental protection.
Equipment dehumidification capacity and exhaust volume calculation
Figure 2 high temperature drying unit installation diagram
(1) Dehumidification capacity W (kg / h) can be calculated as follows:
See Table 1 shows that the model for the high-temperature drying unit CAD-13IB heat production capacity of 15kW Taking into account the heat drying room and the air to take away the heat loss, where the actual absorption of heat by 60% of the bed Utilization calculation, take N = 60% Q = 9.0kW, then
W = 3600N / (KΔh) = (3600 × 9.0 × 103) / (1.05 × 2635) = 11.71 kg / h
Where: W-- maximum dehumidification capacity (kg / h)
h ----- enthalpy difference between steam and water, generally desirable â–³ h = 2635 (kJ / kg);
K ----- consider the use of components scaling and the efficiency of the additional coefficient, under normal circumstances K value of 1.05 calculated.
(2) exhaust volume calculation
Assuming indoor environmental parameters: humidity ∮1 = 98%, temperature t1 = 80 ℃,
Outdoor environmental parameters: humidity ∮ 2 = 98%, temperature t2 = 80 ℃,
Check wet air enthalpy chart available: d1 = 27.2g / kg; d2 = 11.0g / kg
Then Δd = d1-d2 = (27.2-11.0) g / kg = 16.2 g / kg
Consider 25% ~ 35% room volume margin, take ξ = (1 + 30%) = 1.3.
Exhaust air volume: L = ξΔh / (d1-d2) = 1.3 × 11.71 × 103 / 16.2≈940m3 / h
Economic Analysis
This hotel uses our high-temperature heat pump drying unit (model CAD-13IB, rated heating 15.0KW, detailed parameters in Table 1), the required calories kcal: 15.0kW × 860kcal / kWh = 12900kcal.
The same produces 12900 kcal of heat, high temperature heat pump drying unit operating costs are as follows:
From the above data we can see that (electricity at 1.0 yuan / degree) high-temperature heat pump dryer operating costs only electric heating dryer 30%, gas dryer 60%, 40% of the oil dryer, Therefore, it can be concluded that the energy-saving effect of the high-temperature heat pump drying unit is very obvious, and the high-temperature heat pump dryer uses environmentally friendly refrigerants, and does not emit any exhaust gas or waste heat during operation, and does not cause any pollution to the environment. And high security, automatic control, high temperature control accuracy (± 1 ℃), without personnel on duty, saving staff costs. This shows that the use of high-temperature heat pump drying unit of the more obvious economic benefits.
For the actual case of this project, the head of the original hotel through the distribution of bedding, washing, drying and disinfecting by others, consume a lot of manpower and financial resources, through the transformation of the use of Kelaiteke high temperature heat pump drying unit , Not only save a lot of wash costs, careful analysis will find that the drying process requires about 70 ℃ temperature range, it is the best available air source heat pump temperature range. In terms of temperature control, heat pump units have already achieved automation, without human intervention in operation, can be accurately and reliably control the temperature. Do not use traditional fuels, but also reduce the environmental pollution, but also to some extent improve the drying speed and quality of bedding, truly "three provinces" (that is, save time, labor, money) results.
Heat pump drying technology prospects
The material drying process is a huge energy consumption process. According to statistics, the energy consumed for drying in most developed countries accounts for 7% -15% of the total energy consumption in the developed countries, while the thermal efficiency is only 25% -50% , And most drying processes, especially for heat sensitive materials such as food and biological materials, have an impact on their color, nutrition, flavor and texture. Heat pump drying technology has the advantages of less energy consumption, less environmental pollution, high drying quality and wide application range. Its excellent energy-saving effect has been proved by various experimental research both at home and abroad.
Foshan armor-resistant air-conditioning Co., Ltd. set scientific research, production and marketing as one, market-oriented enterprises, we focus on energy-saving environmentally friendly refrigeration, air conditioning, heating products and technology research and development. Has now developed a water source heat pump, air source heat pump hot water unit, air conditioning and sanitary hot water multi-function unit, air-cooled cold (hot) water air conditioning unit, industrial chillers, high temperature heat pump drying unit and fan coil unit Seven series of more than 200 models of products. Especially in the field of high-temperature heat pump, it is moving toward improving drying temperature, developing new heat pump drying system, and automatic control technology of heat pump. Looking forward, KoLai Tektronix will constantly invest in the existing technology , Continuous innovation, improve product competitiveness. "Building cold, heat integration experts to solve" is the company's consistent goal, but also a solemn commitment. Win-win development with partners, take the road to brand building, providing customers with high value-added products and services, is the common aspiration of all our Kleinkaike! Warm welcome to all my colleagues visit the guide!