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Thermal hydrodynamic pumps must heat conditional typical (matching the requirements of Construction regulations) residential, household, cultural-entertaining premises, premises of industrial-economic purposes, etc., of the volume: TS1-055 – 5180m3, TS1-075 – 7060m3, TS1-090 – 8450m3, TS1-110 – 10200m3 (the thermal hydrodynamic pump marking specifies the installed capacity of the used electric motor).
Necessary temperature mode can be maintained in heated premises. For example, 20 - 22°C for living spaces, 15 - 18°C – industrial spaces, 8 - 12°C – warehouse. Temperature mode regulating is made by setting the heat carrier temperature range on the control panel. As heat carrier heats up to the set maximum temperature the thermal hydrodynamic pump turns off, as heat carrier cools to the minimum set temperature – turns on. It is generated exactly as much thermal energy as much heat loss of a heated object. During winter periods the operating time is more and less for autumn-spring periods. For the average heating season (for Moscow region it makes 210 days) the equipment operates 25-30% of time (see Table 1). Therefore we apply factor Koper. = 0.3 to preliminary calculation of financial expenditure for heating.
Automatics allow to make change-over of a temperature mode within a minute. In the evening a duty engineer can lower temperature in premises and before the beginning of working day set comfortable temperature in premises again. It allows additionally lower heating cost at least on 35%.
Table 1.
Organization
|
Building material
|
Volume of Premises Cube. m. |
Object purpose |
Average temperature degree |
Electric power expenditure for a month, kW/hour |
Consumed Thermal power per hour KW |
volume heated 1 kW, cubic m |
Branch “Plastimex M” |
Brick |
20 433 |
Workshop |
18-20 |
45 455 |
63,13 |
323,66 |
OOO “Rubej” |
Sandwich-panels |
22 000 |
Warehouse |
8-10 |
20 000 |
27,78 |
792,00 |
ZAO “Spline-Centre” |
Brick |
7 000 |
Office |
20-22 |
15 000 |
20,83 |
336,00 |
PBOYuL Zamotaeva |
Metallic hangar |
4 500 |
Repair shop |
16-18 |
8 171 |
11,35 |
391,56 |
OOO “Tuba” |
Sandwich-panels |
26 500 |
Department |
18-20 |
54 000 |
75,00 |
353,33 |
OOO “Alex Terminal” |
Sandwich-panels “Vental” |
3 850 |
Office |
22-24 |
40 318 |
44,29 |
569,78 |
28 400 |
Warehouse |
8-10 |
|||||
OOO “Sever Svet” (Cherepovets) |
Sandwich-panels |
7 200 |
Production department |
15 |
10 117 |
13,74 |
523,81 |
OOO “Steklocenter” (Kaliningrad) |
Brick |
6 000 |
Workshop |
15-18 |
3 556 |
4,94 |
1214,80 |
Table 1 presents real expenses of the users only for one type - energy carrier (electric power) costs. Comparison of costs for heating and heat supply, which we conducted on the basis of six-years operating experience, show that energy carrier costs with thermal hydrodynamic pumps are lower than with heating coil and electrode boilers in 3-5 times, diesel fuel – in 8-10 times, gas-fired boilers – on 15%, central heating – in 3-5 times. Besides, multitariff electric counters are installed in many places. For example, the “Dubna” holiday camp (Sergiev Posad, Moscow region), where thermal hydrodynamic pumps work, has five-tariff counters. Water for heating and HWS heats up in an accumulative tank at the minimum tariff that sharply reduces the costs.
Maintenance costs for heating, heat supply and HWS with thermal hydrodynamic pumps much lower than with gas-fired boilers. Thermal hydrodynamic pumps are fire- and explosion-proof. They are simple in maintenance, an electrician without special training can serve them. Gas boiler-houses must be served by the specially qualified personnel, numerous controlling bodies regularly check an equipment condition, etc.
Maintenance of diesel and gas boiler-houses attached to a building is prohibited in some regions of Russia. We recommend to re-equip such boiler-houses with thermal hydrodynamic pumps as it minimizes capital outlays and also lowers maintenance costs.
Since a stage of licensing documentation reception capital outlays for construction of a gas boiler-house are more in many times than for thermal hydrodynamic pumps. Design of a gas boiler-house is more expensive, auxiliary equipment nomenclature is more difficult and more in terms of quantity, so-called “binding” including chimney. Expenses for gas pipeline from a main to a boiler-house, which cost can be more than the boiler cost, are separate charges. At the same time we regularly see users who could not lay a gas tube or heating main at all due to existing buildings.
The above-stated definitely leads to conclusion that construction of a heat supply station with thermal hydrodynamic pumps considerably cheaper and faster than construction of a gas boiler-house, and in some cases construction of a gas boiler-house is simply impossible.
Some not much competent persons express an opinion on higher reliability of heat sypply with gas and diesel boiler-houses in case of power cutoff. However, they forget that even solid-fuel boiler-houses have automatics and pump equipment, which require electricity. For socially important objects diesel-generators ensuring equipment functioning at off-design situations are provided. The Diesel-generator must have high capacity to maintenance operation of thermal hydrodynamic pumps. Off-design situations do not happen often, therefore economy with a normal heat supply will repay with interest a little higher cost of the diesel-generator.
Thermal hydrodynamic pumps can be applied not only in stationary heat supply stations. Practically always fast-erected constructions of modular type are used in construction. Heating of such constructions is possible and necessary to make with building block heat supply station (BBHSS), which construction includes one or two thermal hydrodynamic pumps, circulating pumps, expansion tanks, filters, sensors, automatics, etc. We developed design of a typical BBHSS, and some modules in modification - with one and three TS1-055 installations – were manufactured. Full-scale tests and design adjustment of a pilot BBHSS for heating of derricks have been successfully conducted for 2007/2008 heating season.